Method of rice irrigation
SUBSTANCE: method includes intermittent flooding of rice checks, water supply to rice crops is carried out in the form of asymmetrical triangular impulses regulated in space and time, reducing the bare soil moisture between the impulses is not allowed below 85% of the total water capacity (TWC), the program distribution of water in the irrigation network between the consumers is carried out on schedule by assigning time intervals of water supply to each of them on the parameters of the regulated impulse, which are determined by the following formulas: - The height of the impulse (water layer), hL;
hL=σ+Δh, mm, where: σ is mean-square deviation of the roughness on the surface of checks, mm; Δh is a layer of water, ensuring flooding of high areas on the check and creating a favourable thermal regime of the soil, mm, it is assigned equal: in a phase of the "shoots-tillering" - 60 mm, in the phase of formation of the embryonic panicle - 100 mm; - The duration of the water supply to create a given impulse height, t1: t1=(hL/q)·α, day, where: q is a hydromodule of flooding equal to 100 mm/day; α is coefficient taking into account evaporation losses equal to about 1.05; - Duration of drawdown of the water layer in a natural way through evapotranspiration (E) and filtration (F) t2: t2=hL/(E+F), day; - Duration of bare soil between impulses t3:
EFFECT: increased efficiency of use of water resources.
1 cl, 4 tbl, 1 dwg
The invention relates to agriculture and can be used for rice irrigation systems.
There is a method of irrigation, called "permanent flooding", in which the layer of water on the pitch, depth from 5 to 20 cm is maintained throughout the growing season from planting to harvesting (See, for example, Aleshin, H.E., Konkova VP Quick reference rice farmers // M: Agropromizdat, 1986. S-91).
The disadvantages of this method are high waste water filtration and forced discharges for the lower layer due to temperature, phase of the development of rice and weeds;
severe thinning of seedlings due to mass mortality of seedlings of rice in flooded anaerobic conditions of the soil.
There is a method of irrigation of rice, called "shortened flooding", in which shoots were obtained when watering watering for short-term aeration of the topsoil, and the flooding of crops with a layer of 12-15 cm is performed with the phase of the sprouts and remove it from the field in stage dough stage of grain (See, for example, Aleshin, H.E., Konkova VP Quick reference rice farmers // M: Agropromizdat, 1986. S-96).
The disadvantages of this method are: a) high non-productive water losses, which are 10-15% higher than at constant flooding associated with forced sbro the AMI water when soaking horizontal surface checks; b) thinned seedlings, due to the fact that some of the rice seeds buried in the soil more than 3 cm, were in anaerobic conditions.
There is a method of irrigation of rice, called "intermittent inundation, when you create a layer of water-specified value, the filing of a check stop, give the layer to absorb and for the soil to dry to a certain moisture content, and then create a layer of water and so on in the same sequence (See, for example, Popov V.A., Alekseenko I.A. Irrigation rate and yield of rice in intermittent flooding of crops /rice, 2006, №8. P.67-69), taken as a prototype.
The disadvantage of this method is the elimination of the possibility of rational software distribution of water in irrigation network due to the lack of a science-based process regulation of irrigation, size of the length of the elements intermittent flooding, which makes rational use of water resources and their savings.
The objective of the proposed method is efficient use of water resources.
The solution of this problem is achieved by the use of intermittent flooding in the form of an asymmetric triangular pulse, regulated in space and time, reducing the moisture content of bare soil between pulses lead up to 85% full VL is Giamatti (RO) software distribution of water in irrigation network between consumers carried out according to the schedule, assigning time intervals to supply water to each of them according to the parameters regulated pulse.
The parameters of the pulses is determined by the formula:
1. Pulse height (water layer), hSL
hSL=σ+ ∆ H, mm
where σ is the standard deviation of the roughness on the surface of checks, mm;
Δh - water layer, providing high flooding areas on the receipt and favorable thermal regime of the soil, mm is Assigned equal in phase "shoots - tillering" - 60 mm, in the phase of formation of the embryonic panicle - 100 mm
2. The duration of water flow to create the desired height of the pulse, t1:
where q is the water ratio flooding equal to 100 mm/day;
α - coefficient taking into account losses to evaporation, approximately equal to 1.05.
3. Duration sabotai water layer in a natural way by evapotranspiration (e) and filter (f) t2:
4. The duration of bare soil between pulses t3:
where ω is the humidity where it woodenjewelry close to 0. the intensity of transpiration is not reduced. For loamy soils it was equal to 85% duty cycle (Fig.1).
5. The number of cycles of rotation N, the commercial distributor is determined by the formula:
where Ttotal- the total duration of the pulse d.
A specific example of the method
Tests of the new method of irrigation were carried out on rice irrigation system LTD ESP "Red" Krasnoarmeysky district of Krasnodar Krai in 2009 on 8 fields with a total area of 48 hectares Experimental checks were served one fill and one waterer, agrotechnics the same on all checks.
All checks were fixed at seven fixed sites 1×1 m to monitor the dynamics of growth, drainage, soil moisture and other
During the irrigation period was conducted gauging, biometric and hydrochemical observations and surveys. Humidity the surface of bare soil between pulses varied from 100 to 85% duty cycle.
A record harvest of rice was performed in two ways: 1) biometric analysis of sheaves of stationary platforms, and 2) a solid combine harvesting.
Biometric analysis of the structure of the crop showed that its value was almost the same (table 1).
However, Shearer records indicated a significant difference: in the experimental map, it was found to be 4 kg/ha higher (73,05 C/ha against 69,75 kg/ha). This is due to the following: on the map with the constant flooding, there was a noticeable lodging of crops, while on the pulse flooding it almost was not observed at all. And as you know, when cleaning polegshey rice losses increase by 3-4 kg/ha, and under adverse conditions reach 16-18 kg/ha
As shown by the results of observations, pulse irrigation had no negative impact on the contamination of crops, the chemical composition of irrigation water and yield of rice.
|The content of mineral substances in the soil water, mg/l|
|map 10 (control)||107,1||0,7||,15||0,02||2,85||7,0||0,02||0,1|
|map 12(start pulse)||133,88||0,95||0,1||0,02||4,3||7,0||0,02||0,1|
|map 10 (control)||107,1||0,95||0,2||0,02||a 4.9||7,0||0,02||0,1|
|map 12 (mid-start)||196,35||0,15||0,15||0,02||3,35||7,0||0,02||0,1|
The average yield on experimental receipts were $ 73.5 kg/ha, for control - 69,75 kg/ha, and creating aerobic conditions in the soil, increases the resistance of crops to lodging, prevents diseases of the roots of plants, reduces water consumption for rice cultivation.
Water saving primulinum rice irrigation and petititon circulation compared with the control amounted to 4 thousand m 3/ha.
|Analysis of the characteristics of novelty|
|The proposed method||Prototype method|
|Intermittent flooding in the form of an asymmetric triangular pulse, regulated in space and time.||Intermittent flooding without preset pulse parameters.|
|Reducing the moisture content of bare soil between pulses do not allow below 85% of full capacity (PV).||Science-based humidity is not installed.|
|Software distribution of water between users perform on schedule, assigning time intervals to supply water to each of them according to the parameters regulated pulse||Preparation of scheme water allocation is not feasible|
|Analysis of the essential features of the proposed solutions|
|Signs offer solutions||New properties acquired through the use of technical solutions||Achieved by ogically effect|
|Intermittent flooding In the form of an asymmetric triangular pulse, regulated in space and time.||You can design the software distribution.||Rational use of water resources.|
|Reducing the moisture content of bare soil between pulses do not allow below 85% of full capacity (PV).||Science-based parameter humidity between pulses.||Rice yield is not reduced.|
|Software distribution of water in irrigation network between consumers carried out according to the schedule, assigning time intervals to supply water to each of them according to the parameters regulated pulse.||You receive the most efficient distribution of irrigation water.||Reduced irrigation rates on 4 thousand m3/ha.|
The irrigation of rice, including intermittent flooding of rice paddies, characterized in that the water supply to the rice crops is carried out in the form of an asymmetric triangular pulse, regulated in space and time, reducing the moisture content of bare soil between pulses is not to the will escaut below 85% of full capacity (PV),
software distribution of water in irrigation network between consumers carried out according to the schedule, assigning time intervals to supply water to each of them according to the parameters regulated pulse, which is determined by the formula:
pulse height (water layer), hSL:
hSL=σ+ ∆ H, mm
where σ is the standard deviation of the roughness on the surface of checks, mm;
Δh - water layer, providing high flooding areas on the receipt and favorable thermal regime of the soil, mm, is assigned equal in phase "shoots-tillering" - 60 mm, in the phase of formation of the embryonic panicle - 100 mm;
the duration of water flow to create the desired height of the pulse, t1:
where q is the water ratio flooding equal to 100 mm/day;
α - coefficient taking into account losses to evaporation, approximately equal to 1.05;
the duration of the drawdown of the water layer in a natural way by evapotranspiration (e) and filter (f), t2:
the duration of bare soil between pulses, t3:
where ω is the humidity is ü, when her woodenjewelry close to 0, and the intensity of transpiration is not reduced, for loamy soils it was equal to 85% RO;
the number of cycles of rotation N, the commercial distributor is determined by the formula:
where Ttotal- the total duration of the pulse, days.
SUBSTANCE: invention relates to agriculture, in particular, to mechanisation of watering and can be used for irrigation of agricultural crops by discrete (impulse) water supply in the centers of moistening. The set of locally-impulse watering comprises a storage container, a feeding tube with tap, a siphon with the drain outlet, a receiver-collector and irrigation pipes with water outlets. The water outlets are made in the form of microtubes connected with the inlet ends to the irrigation pipes, and with the outlet ends - with the atmosphere. The irrigation pipes are located below the outlet ends of the microtubes. The receiver-collector cavity is hermetically connected to the drain outlet of the siphon. The upper and lower ends of the receiver-collector are communicated respectively with the atmosphere above the level of the drain outlet of the siphon and with the irrigation pipes at the level of the irrigated area.
EFFECT: increased reliability and efficiency of operation of the set and uniform distribution of irrigation water through the water outlets.
SUBSTANCE: invention relates to the field of agriculture, in particular, to reclamation. The method includes planting seeds or seedlings of vegetable crops and their vegetative irrigation with electroactivated aqueous solutions - anolyte and catholyte. The first irrigation after planting is carried out with the activated aqueous solution of anolyte and catholyte at their ratio (70:30)-(80:20). The subsequent irrigations are carried out with the activated aqueous solution of with the ratio of anolyte and catholyte (30:70)-(20:80). At that after the first irrigation with the activated solution one irrigation with light water is carried out, and the subsequent irrigations with the said solutions are alternated with irrigations with light water so that one irrigation with the activated aqueous solution is accounted for two irrigations with light water with the predetermined irrigation norm. Prior to mixing the components of the activated water the anolyte pH is 3.2-4.7, and the catholyte pH is 10.5-12.0.
EFFECT: method enables to improve the quality of vegetable produce and increase productivity, reduce energy consumption and improve the environmental friendliness of the process, and also reduce the consumption of activated aqueous solutions during irrigation.
2 cl, 1 tbl, 1 ex
SUBSTANCE: invention relates to the field of agriculture and land reclamation. The method includes division of sloping areas to at least two levels, performing the preparatory works associated with digging and displacement the soil to create the limited amounts on the areas of different levels. And on the sloping and divided to sections areas the diking is made with the creation of the reservoir for moisture collection located upward the irrigated areas. Then in spring period of thawing of soil to the depth of 0.5-0.8 height of topsoil the water is released from the reservoir into the lower irrigated diked areas with its uniform distribution on the irrigated areas. The moisture collection in the reservoirs located at a higher level is carried out throughout the year with use of underwater channels and trays made in the soil.
EFFECT: method provides long-term conservation of water and physical soil properties when used effectively.
2 cl, 3 dwg
SUBSTANCE: invention relates to the field of agriculture, in particular, to soil reclamation. The method includes conducting of primary and pre-sowing soil treatment, planting in furrows of cuttings from licorice rootstocks, narrow-row sowing of wheatgrass and harvesting wheatgrass-licorice hay and licorice rootstocks. Formation of agrophytocenosis is carried out in I-II decade of October by alternating the bands of common licorice - 3 rows and wheat grass - 5 rows. And the distance between the furrows of licorice is 0.3 m, and between the rows of wheatgrass is 0.15 m. In the first year of formation of the plantation the two-fold mowing for hay of wheatgrass tops is carried out to a height of 0.12-0.15 m. On the 2-5th year, up to 2-3 mowing of wheatgrass-licorice hay is carried out. And during five years after each mowing of tops of wheatgrass-licorice agrophytocenosis the mineral feeding is carried out, irrigation with water with the salinity of less than 1.8-3.0 g/l while maintaining the threshold of preirrigation soil moisture not lower than 65-70% minimum water capacity. The rootstocks of licorice are harvested at the end of the growing season of the 5th year of life of wheatgrass-licorice agrophytocenosis.
EFFECT: method enables to improve the phytomeliorative effect contributing to reduction of content of water-soluble salts in the arable soil layer, to reduce the level of ground water, and increase the yield of high-protein cereal-legume hay and medicinal licorice raw material.
SUBSTANCE: system comprises a source of irrigation, water intake facilities connected to self-pumped pipeline, irrigation sites with compacted irrigation furrows. The self-pumped pipeline is connected through valves with diaphragm actuators to a pair of distribution pipelines. The irrigation pipelines are laid on the maximum slope of the terrain. The upper part of the irrigation sites with compacted irrigation furrows is laid at an angle to the terrain contour lines, and the lower part - parallel to horizontal lines. On the irrigation pipelines the hydraulic step motors are mounted. The hydraulic motors are connected to the spherical distribution valve. The spherical distribution valve outlets are connected by tubes to the water-distributing furrows. Through the water-distributing furrows the water is supplied to pairs of compacted irrigation furrows located at the edges of the beds. The upper part of the irrigation furrows is laid at a mild slope along the terrain contour lines. The lower part of the irrigation furrows is made in the form of deep irrigation furrows laid without slope. In the middle of the beds the trenches of up to one metre depth are laid, which are filled with peat and manure. The center of the beds is covered with trash mulch. The screens of ameliorative film are laid below the irrigation furrows. Above the screens of ameliorative film in the soil active layer of the beds a 5-10 cm layer of sand or gravel is laid. The irrigation control unit is connected to the valves diaphragm actuators.
EFFECT: construction enables to improve the uniformity of soil moisture, moisture capacity of the soil active layer, to prevent the water loss for depth filtration.
SUBSTANCE: system comprises a source of irrigation, a dam, water overshot wheel, a water intake device in the form of a mesh scouring cylinder, a liquid-gas ejector and a water pump, generators of air ions and ozone, a reservoir with manure, a subsoil system of moistening and aeration of soil in the greenhouse, a unit of soil humidity control. A mesh scouring cylinder is installed inside the water overshot wheel. Inside the scouring cylinder a waste chute is located with a perforated pipeline. The perforated pipeline is connected through the gate to the inlet of the circulating-water intake. The outlet of the circulating-water intake is connected through the gate to the input of the water pump. The water wheel shaft is connected through the reducer to the water overshot wheel. The outlet of the water pump is connected to a water pipe of the liquid-gas ejector. The ejector air nozzle is connected through the gates to the generators of air ions and ozone, the atmosphere, the reservoir with manure. The reservoir with manure is connected through the gates with the generators of air ions and ozone. The output of the liquid-gas ejector is connected to the conductive pipeline. The conductive pipeline is connected to the perforated irrigation pipelines. The perforated irrigation pipelines are mounted under the trenches filled with manure. The trenches are located in the middle of the beds covered with film tunnels. Above the beds the greenhouse is placed. In the active layer of the soil of the greenhouse a capacitance sensor of integrated humidity of soil horizon is placed. The sensor is made in the form of two parallel metal strips. Between the parallel metal strips a layer of porous ceramic is laid, connected to the unit of soil humidity control.
EFFECT: design enables to improve the quality of moistening, aeration and heating the active layer of soil in the greenhouse.
SUBSTANCE: group of inventions relates to the field of land reclamation and may be used to improve quality of water under trickle irrigation of crops, when watering is done with water of high salt content. The method includes mixing of mineralised and distilled water. Production of irrigating water of required mineralisation is provided with the help of a device that separates irrigating water into two parts. One of the parts remains unchanged, and the other one is demineralised, with their subsequent mixing at the necessary proportion or without mixing, using each one separately. The device for method realisation comprises a body, an evaporating element, a condensate collector and a device for distillate drainage. The body is equipped with a hollow dismountable cover. The upper and lower surfaces of the cover are made as spherical from optically transparent material with different radii of curvature. The cover, when filled with irrigating water, forms a collective concave-convex lens, which focuses solar radiation at a focal plane. The evaporating element is made in the form of a detachable sleeve. Drainage of distillate and control of mineralisation of irrigating water is carried out with pipelines equipped with control devices and communicating with the cover cavity, environment and condensate collector. The collector is made in the form of a ring to form a circular inclined tray between the body and the ring, and this tray collects distillate.
EFFECT: invention provides for production of irrigating water with salt composition that minimises negative effect at structure of irrigated lands soil.
2 cl, 1 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to gas-drop jet generation and may be used in fire fighting, agriculture, etc. Fluid feed comprises forcing fluid axially via feed branch pipe, confuser and cylindrical nozzle aligned and communicated with said branch pipe. Fluid tangential feed is executed via conical cartridge aligned with cylindrical nozzle with vortex annular chamber secured atop cylindrical part of said cartridge and provided with fluid feed pipe. Two lines of fluid feed tangential channels are made along edges of said annular chamber. At least three tangential channels are arranged in every said line to communicate annular chamber with housing cylindrical chamber.
EFFECT: higher efficiency of fire fighting.
2 cl, 2 dwg
SUBSTANCE: invention relates to agricultural reclamation, in particular to subsurface irrigation. The humidifier comprises a water-supplying container (1), the main subsurface injector (6), and flexible water-supply hoses (12). The main subsurface injector (6) is made with a perforated lower part (10) and a mesh filter (9). The water-supplying container (1) is made removable, is equipped with a threaded connection (5), a mesh filter (3) and a shut-off valve (4). The humidifier is equipped with additional subsurface injectors (11) to provide uniform saturation with water throughout the root zone area.
EFFECT: design enables to improve the efficiency of delivery of soluble fertilisers, to avoid water loss through evaporation, and create favorable air conditions in the soil.
3 cl, 2 dwg
SUBSTANCE: wheel comprises a tire 12 with a rim 11, a hub 10 with lateral discs 5 and an axis 9, a drive ring 7, fasteners 2 to connect the drive ring 7 to the hub 10, a pusher 13, and an anti-recoil brake 16. On the drive ring 7 the stops 8 are mounted. The brake 16 interacts with the stops 8. The drive ring 7 has joint plates 15 with holes 14, mounted in the center plane and fixed on the inner surface of the drive ring 7. The drive ring 7 is mounted with the ability to change the axial position and fixation by the fasteners 2 on the pins 6 with screw 3, located parallel to the axis and rigidly attached to the lateral disc 5. The lateral disc diameter is made larger than the diameter of the hub 10. The pins 6 pass through the holes 14 in the joint plates 15 of the drive ring. In the pins 6 there is a set of radial holes 4 located in planes parallel to the center plane of the wheel. In the holes 4 of the pins 6 the removable thrust pins 1 are mounted.
EFFECT: constructive implementation enables to improve the control accuracy of the axial position of the drive ring relative to the tire of the rim.
SUBSTANCE: invention relates to the field of agriculture, in particular, to cultivation of rice. The method of weed control comprises obtaining the rice seedling according to the mode of shortened flooding, processing of weeds with the herbicide Nominee in combination with a surface active agent (surfactant). After obtaining the rice seedlings the water level in checks is raised to 7-10 cm to cover the seedlings with a layer of water. Weeds of genus Echinochloa in full tillering phase are located above water, they are treated with herbicide Nominee in a dose of 95-100 ml/ha at a rate of working fluid at aerial treatment of 50 l/ha. Then in two days after the treatment the water layer in the checks are lowered until the appearance of rice leaves over the surface of the water and nitrogen top dressing is carried out, such as with urea to remove the stress load on the rice sprouts.
EFFECT: proposed method enables to increase effectiveness of barnyard grass control in phase of 6-7 leaves, outgrowing in growth and development the rice crops, to prevent their re-occurrence, to eliminate thinning-out of the sprouts and herbicidal burn of young rice seedlings, and hence to keep the rice harvest.
SUBSTANCE: invention relates to agriculture, in particular to preparation of soil for planting rice. The method includes autumn under-winter ploughing of soil, repair and reclamation works in the inter-vegetation season, spring presowing treatment of soil. In autumn, after harvesting rice or previous crop on the rice field of the soil suitability condition of the rice irrigation system is defined. The condition of the rice irrigation system is evaluated according to the criteria: "good", "satisfactory" or "unsatisfactory". After that, taking into account the objects of influence relevant to the soil suitability condition, the optimal-adaptive complex of manufacturing operations is developed and implemented.
EFFECT: method enables to reduce energy consumption and labor intensity of the soil suitability measures performed, to improve the quality of treatment and soil grading, to increase productivity, to reduce the production cost of rice, to improve the ecological situation in the rice irrigation system.
SUBSTANCE: invention relates to the field of agriculture and land reclamation. The method includes watering, disking of the soil after mass weed emergence, harrowing and moisturising watering followed by surface treatments. First a provocative wetting the soil with water is carried out to complete moisture saturation of its root zone with a depth of 0.06-0.08 m. Then, after the mass emergence of the weeds, disking of the soil is carried out to a depth of 0.1-0.12 m with simultaneous harrowing to complete destruction of the grown vegetation. After new weed sprouting emergence and red grained forms of rice a layer of water is created, covering completely the vegetative plants, which is supported for one or two weeks till the complete destruction of weeds and red grained forms of rice, and then it is left it without treatment until spring. Before sowing rice in spring surface tillage is carried out to a depth of seeding down with simultaneous destruction of the remnants of weed vegetation.
EFFECT: method enables to obtain rice fields clean from weeds, to increase the degree of equalisation of checks plane, to eliminate chemical treatments of rice crops against weeds, to improve reclamation-ecological condition in the rice system, and to increase yields.
2 tbl, 1 ex
SUBSTANCE: method includes transformation of the obtained image, and calculation of the areas of marked contours. And in non-vegetation period with the navigation system the coordinates and numbers of points of soil sampling and level measurements and groundwater salinity are applied to the map of the rice field. Then a quantitative assessment of ameliorative state of the soil is carried out of rice irrigation system according to the level and salinity of groundwater, humus content, acid-base properties of the soil, provision of hydrolysable nitrogen, mobile potassium and mobile phosphorus, the percentage of soil aggregates in the ploughed horizon, the degree and type of soil salinity by assigning each ameliorative criteria from 1 to 5 points, depending on the extent of its impact on the ameliorative state of the soil. After that, according to the score of ameliorative criteria the ameliorative state of the soil is evaluated, and with a score of 8-20 the ameliorative state of the soil is considered good, 20-30 - satisfactory, 30-40 - unsatisfactory. Then, for each ameliorative state of the soil the flow process chart with optimally-adaptive complex of manufacturing operations is developed.
EFFECT: method enables to increase the agro-resource potential of the rice irrigation system and rice yield.
2 tbl, 1 ex
SUBSTANCE: invention relates to agriculture, in particular the cultivation of rice. Since the beginning of the growing season of rice the water supply is carried out from the distributor to the rice fields. Then, an outflow of seepage water is performed from the rice fields into the waste channels and seepage water is re-used. Weeds are mowed to the water level in the discharge canal of the irrigation system during the transition of plants from one vegetation phase to another.
EFFECT: invention enables to reduce water losses for evaporation and transpiration of irrigation water from discharge canals.
1 tbl, 1 ex
SUBSTANCE: invention relates to the field of agriculture and land reclamation. The method includes discharge and drainage outflow of seepage water, application of nitrogen fertilisers and herbicides, transferring of map and site drainage and discharge channels to the mode of backwater and return the water through a water lift. Thereat the air-heating installation is mounted at the site of conjugation of the site drainage and discharge channel and the intra-entity collector, and is used for energy conversion of the hydraulic drop in the air pressure, which is reported to the water lift to return the water.
EFFECT: method enables to reduce the number of hydro-mechanical devices per area unit of rice irrigation system, to increase the use of drainage and discharge runoff, to improve the conditions of mixing and dilution with water from the waste ditch with clean irrigation water, along with an increase in fertiliser use efficiency for rice growing.
SUBSTANCE: invention relates to agriculture, in particular the cultivation of rice. The method includes the supply of water from the distributor to the rice fields, the outflow of seepage water from the checks in the waste channels and re-use of seepage water for flooding checks. The outflow of seepage water is carried out by the use of mowing weeds from the waste channels. Mowing weeds is carried out in the period from emergence of grains of rice to the end of tillering to stem height of 0.2-0.3 m, then from the end of tillering and to coming to the phase of the tube - to the height of the stem 0.6-1.0 m, as well as in the period before tasseling the tassels to the middle of the phase of maturation - to the height of the stem 0.2-0.3 m.
EFFECT: invention enables to provide an optimum temperature mode in a rice field and reduce the irrigation rate by reducing water losses for seepage from the rice check and increase rice yield.
1 tbl, 1 ex
SUBSTANCE: invention relates to the field of agriculture and land reclamation. The method includes an autumn tillage by disking, harrowing, sowing of winter crops and wintering intercrops, their harvesting and planting rice. After harvesting of winter crops and wintering intercrops a general planning of checks planes with simultaneous repair of water-inlet and water-outlet irrigation network, restoring check rollers and roads. Then, on the checks surface a maximum layer of water is created and supported until the end of the irrigation season. Thereat the soil is maintained in a condition of maximum water capacity for the entire winter period, after which the density of the plow layer reaches 1.05-1.1 t/m3.
EFFECT: method enables to save energy capacity and reduce the labour intensity of melioration measures carried out; it does not require a spring presowing processing and agro-technical measures; to improve the quality of control of weeds, to increase yields, to reduce the cost of produced grain of rice, to improve the ecological situation in the rice irrigation system.
3 tbl, 1 ex
SUBSTANCE: method includes sowing rice seeds with their placement in soil at the depth 2.5-3 cm. After that fields are flooded with water for 3-5 days for seed soaking. Then water is drained for period of seed germination. After that re-flooding of fields with water is carried out.
EFFECT: method insures dense shoots and reduces decree of rice layering, which allows to increase rice yield and its harvesting.
SUBSTANCE: method includes preplanting treatment of seeds with a plant growth regulator. In order to enhance capacity of survival of rice, aqueous solution of Melaphen at strength of 1·10-6-1·10-9 g/l is applied as a plant growth regulator.
EFFECT: efficient increase of viability and germinating ability of the seeds, enhancement of survival capacity of rice, increase in productivity and positive impact upon technological characteristics of the products.
FIELD: agriculture, in particular, controlling of weedage in rice growing.
SUBSTANCE: method involves sowing rice crop to obtain young crops through wetting of soil in checks and provoking germination of weeds (barnyard grass); treating weed sprouts having no more than 3-4 leaves with binary bacteriological mixture of two kinds of herbicides used in doses of 0.9-4.0 l/hectare, respectively, at flow rate of up to 500 l/hectare; creating constant water track in check of 5-7 cm depth 48 hours after treatment of weeds.
EFFECT: increased efficiency in controlling of weeds, such as barnyard grass, and increased rice yield.
1 tbl, 1 ex