Weed controlling method

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

 

The invention relates to the field of agricultural production, particularly rice, to control annual grass weeds of the genus Echinochloa - ezhovnikami: risovidnym, borodaty and ordinary.

In the practice of international and national rice various methods of weed control: agronomic, land improvement, breeding and seed and chemical.

There is a method of weed control, including the combination of a deep (20-22 cm) autumn plowing with the turnover of the reservoir and subsequent spring butchering it (see V.p.konohova. Textbooks rice farmers. M: “Kolos”, 1982, s.138). The disadvantage of this method is that the plowing of the top layer of the soil, weeds with seeds, weeds completely destroyed, as some of them remain viable for several years, hence the need to conduct additional spring agricultural, which makes this method is energy-intensive.

There is a method of weed control (ezhovnikami), consisting in the use of herbicide systemic effects of cacciola (70% EC), which is deposited into the soil before planting with incorporation to a depth of 3-5 cm or after sowing of rice is not more than 24 hours (see the System of measures for the protection of crops from pests, diseases and weeds in the Krasnodar region. Normative materials and technological laws is s. Krasnodar, 2000, p.24)

The disadvantage of this method is that sakima only destroys germinating weeds and has a short period of toxicity, resulting in re-contamination of crops.

There is a method of weed control (ezhovnikami), we adopted as a prototype, which after planting rice on the bill creates a layer of 10-12 cm of water and maintain it until naklevyvaniya of Fig. After which the water is discharged and rice seedlings and weeds grow in moist soil in check. After the formation of weeds no more than 3-4 leaf crops treated with facet at a dose of up to 1.8 l/ha (see System of measures for the protection of crops from pests, diseases and weeds in the Krasnodar region. Normative materials and production schedules. Krasnodar, 2000, p.24).

The disadvantage of this method is low efficiency, due to the need of using a layer of water for at least 10-12 cm as a deterrent to rapid weed growth before treatment, as well as the destruction of only the first tier of weeds, which promotes the re-contamination of crops of rice weeds.

The present invention is to increase the effectiveness of the fight against ironically on crops and increase rice yields. This object is achieved in that after planting rice seedlings and weeds p is get in moist soil. After reaching the weeds age not more than 3-4 leaves them handle binary tank mixture protivorakovykh herbicides: facet (25% CU) - to destroy emerged seedling weeds and cacciola (70% EC) is to prevent re-clogging taken in doses of: a facet of 0.9 l/ha + sakima 4,0 l/ha (recommended dose in case of separate application of 1.8 and 8.0 l/ha, respectively).

The experiments were carried out in 2001-2002 experimental experimental station of the research Institute of rice, map No. 14, check 1 in 3 versions (control - rice cultivation without treatment against weeds, cultivation of rice weed control method prototype; the cultivation of rice weed control offered by the way).

An example of implementation of the proposed method

After spring tillage on the adopted technology (see Technology of rice cultivation. Methodical instructions. M.: Kolos, 1983) in may planted cheque seeds of rice varieties Brine. After sowing, the water layer was not created, and rice seedlings were obtained when soil moisture in check, causing the maximum germination of weeds (Ionikos).

When forming a seedling weeds no more than 3-4 leaves were processed last binary tank mixture of facet and cacciola. The mixture in the form of an aqueous solution was prepared immediately before use by mixing herbicides, taken from the calculation of operating the fluid 500 l/ha in the following doses:

water 495,1 l + facet of 0.9 l/ha + sakima 4,0 l/ha

48 hours after the weeds have created a permanent layer of water depth 5-7 see

The results of field tests in the form of average for 2001-2002 are presented in the table.

Table

Comparative biological and economic efficiency of existing and proposed ways of dealing with ezhovnikami (rice research Institute, 2001-2002)
OptionsDose of herbicide (l/haThe number of rice plants, units 1 m2Biological effectiveness (destruction of weeds)% The yield of rice,

t/ha
Control (without treatment)to 130.653,6x)3,5
Existing: facet(prototype)1,8176,296,26,6
Offer: facet + sakima0,9+4,0210,0the 98.97,2
x - the number of weeds before cleaning units per 1 m2

The biological effectiveness of the proposed method is not inferior to existing and economic surpasses them. The latter can be explained by the use of a longer time watering irrigation p and the sprouting rice and halved doses of herbicides, consequently, less toxic and their effect on the rice plants. As a result, as it follows from the data of a two-year field experiment, not less than 11.5-19.2 percent maintained a strong density of rice plants and formed its higher yield (see table).

With consideration actually received increase rice yield, on average, over two years of research amounting to 0.5 t/ha, the economic efficiency of the proposed solution in terms of money, under the current procurement price for paddy rice 3,5 rubles/kg, estimated 1.75 RUB with 1 hectare

At the current annual amount protivorakovykh herbicides in rice industry of Krasnodar region for the last five years 1998-2002 20 thousand hectares, joint application halved doses of facet and cacciola allows to obtain the expected economic effect of 35.0 million rubles

Thus the use of the proposed method allows to obtain the following benefits:

- reduce consumption of facet and cacciola in two times in comparison with separate their application without reducing the biological and economic efficiency;

- to combine different type of herbicide action in one technology way - destruction appeared in sowing weeds and prevent new growth of their seedlings. Each of the herbicides applied separately, takemikazuchi does not possess;

- longer time to grow rice seedlings in moist soil in check, to use lower and less toxic doses of herbicides, thereby retaining more number of plants per unit area;

to obtain greater economic benefit by increasing yields of rice;

Analysis of the characteristics of novelty
Prototype methodThe proposed method
SeedingThe same
Bay cheque water layer 10-12 cm after planting until naklevyvaniya riceNo
Water dischargeNo
The moist soil in check after discharge to the formation of weeds no more than 3-4 leavesThe moist soil in check after sowing of rice to the formation of weeds no more than 3-4 leaves
Management of weeds facet dose

1.8 l/ha
Management of weeds binary tank mixture of facet and cacciola taken in doses of 0.9 and 4.0 l/ha, respectively
Flooding cheque layer of water at 48 hours after treatment of weedsThe same

Analysis of the essential features of the proposed solutions
Signs offers the suggested solutions New properties acquired through the use of signs technical solutionsBenefits
The moist soil in check after sowing of rice to the formation of weeds no more than 3-4

leaves
Provocation greatest number of weedsThe destruction of more weeds, increasing the density of rice and, as a consequence, the effectiveness of the struggle
Management of weeds banernoj mixture of facet and cacciola at doses of 0.9 and 4.0 l/ha, respectively, from the calculation of fluid flow to 500 l/haThe combination of different herbicide action in one technology way - destruction appeared in the sowing of weeds and preventing the growth of new shootsIncreased yields, reduced pesticide load, increase of efficiency of struggle

Method of weed control, including planting of rice, moist soil in check until the formation of weeds no more than 3-4 leaves, processing herbicide and subsequent flooding cheque layer of water after 48 h after treatment of weeds, characterized in that the moist soil in check until the formation of weeds no more than 3-4 leaf carried out after planting rice, and processing of weeds produce binary tank mixture facet is and cacciola, taken in doses of 0.9 to 4.0 litres per hectare, respectively, from the calculation of fluid flow to 500 liters per hectare.



 

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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

FIELD: agriculture, in particular, rice cultivation method.

SUBSTANCE: method involves tillage of soil; providing presowing application of mineral fertilizers; treating rice seeds with growth promoter used in an amount of 1-30 ml/t; sowing and irrigating. Method allows dose of nitrous fertilizer applied during presowing period to be reduced by 30% without reducing rice yield.

EFFECT: reduced production costs and decreased influence of agronomical chemicals upon environment owing to reduced technogenic loading thereof.

6 tbl, 1 ex

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