Method of increase of fertility sandy soils

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture and forestry. In the method the soil is applied into the ground. As soil a mixture of loess loam, organic-mineral soil, peat, borofoska is used in the following content, wt %: loess loam - 35-40, organic-mineral soil - 45-50, peat - 11-12, borofoska - 0.01-0.02.

EFFECT: method enables to increase soil biological activity, to improve physical, physical-chemical, water and physical properties, to improve nutrient status of soil, as well as to use local meliorants and mixed fertilisers.

2 dwg, 2 tbl

 

The invention relates to forestry and agriculture, in particular to increase the fertility of sandy soils, and provides high-quality planting material softwoods.

The known composition of the mixture as a way of increasing the fertility of sandy soils containing powder comprising 50...70% of the oxide of silicon, and the substrate containing 10...20% cellulose, 1...20% mineral wool, 10...20% straw, hemp, 20...40% compost, 1...10% clay and 10...20% filler, which is described in the patent WO 03050060, IPC 05D 9/00, published in 2003, the Use of this method improves the water balance, and promotes the growth of the root system of plants, but quite expensive and complicated from for the preparation of multicomponent mixtures.

There is also known a method of increasing the fertility of sandy soils, which are described in the patent RU 2265980, IPC AV 79/02, A01C 21/00, published in 2005, in which to improve the fertility of sandy soils produce zapaska clay at a dose of 25...50 t/ha, This method increases the content of physical clay in the soil, but is ineffective for improving soil properties and nutrient regime of the soil.

The objective of the invention is to increase the fertility of sandy soils to increase the output of high-quality planting material softwoods.

This object is achieved due to the fact that the proposed method of increasing the fertility of the sandstones is different soils in the mixture contains, wt.%: loess loam - 35-40, organo-mineral soil (a mixture of humus horizon A1 and ashed humus horizon AA) - 45-50, peat - 11-12, borovska - 0.01 to 0.02, which has the following physico-chemical characteristics: humus - 2,97%, physical clay is 27.2%, mobile phosphorus - 475 mg/kg, exchange potassium - 566 mg/kg, pH 7.0.

The results showed that the introduction of soil (soil removed from the excavation in preparation of the construction site; in our case is a soil consisting of a mixture of humus, humus podzolic and partially illuvial horizons of grey forest soil) helped to create a soil structure with arable horizon power 0-20 see the Content of physical clay in the middle of the experimental area in the layer 0-20 cm 19,2%, humus - 2,64%, available phosphorus - 425 mg/kg, exchangeable potassium -164 mg/kg, the response of the soil medium pH of 6.4, the sum of exchangeable bases to 14.1 mEq/100 g soil.

The use of the proposed method of increasing the fertility of sandy soils allow without significant cost to increase their fertility and get significant output standard planting material.

The inventive method of increasing the fertility of the sandy soils used for growing seedlings of Scots pine in the nursery. The experiment was conducted in a field experience in a fourfold popcorn the STI. As a control option, served as the experimental plots on sod-podzolic sandy soil in the binomial fluvioglacial sediments and quartz-glauconitic Sands.

Table 1
Changes of agrochemical properties of a sandy soil making soil, peat and borofsky
Options experienceHumus, %pH (KCl)P2O5K2ONgSEV%
mg/kg soilmEq/100 g soil
spring, 2005spring, 2005spring, 2005spring, 2005spring, 2005spring, 2005spring, 2005spring, 2005
autumn, 2006autumn, 2006autumn, 2006 autumn, 2006autumn, 2006autumn, 2006autumn, 2006autumn, 2006
Natural background (sod-podzolic sandy soil)
He eats. background+peat*+borovska**+N60
Soils (arts. background)
A lawsuit. background+peat+borovska+N60
* peat - 300 t/ha; ** borovska - 60 kg/ha of active ingredient

The use of the proposed method of increasing the fertility of sandy soils increased humus content of 5.2, available phosphorus - 9.3, exchange potassium - 9.8 times.

Introduction soil has created the best water-physical properties for growing pine seedlings: the density of addition 1,04...1.10 g/cm3retained the e physical clay 18,33...21,90%, full vaccum 49,58...55,34%. The maximum content of physical clay is observed in the artificial soil - 21,90%.

Table 2
The change of water-physical properties of sandy soil making soil, peat and borofsky
Options experienceThe density slogen soil, g/cm3PorosityCapillary water capacityFull vaccumThe content of physical clayThe silt
%
spring, 2005spring, 2005spring, 2005spring, 2005spring, 2005spring, 2005
autumn, 2006autumn, 2006autumn, 2006autumn, 2006autumn, 2006autumn, 2006
Natural background (sod-Pozo the East sandy soil)
He eats. background+peat*+borovska**+N60
Soils (arts. background)
A lawsuit. background+peat+borovska+N60
* peat - 300 t/ha; ** borovska - 60 kg/ha of active ingredient

When adding soil to the height of the barrel two-year seedlings above by 43.1% tfact.>ttable, 8,72>to 3.33, P=99,9%), diameter at root collar more by 37.3% tfact.>ttable, 8,30>to 3.33, P=99.9%of the increase above 110,4% (tfact.>ttable, 9,71>to 3.33, P=99,9%), the length of kvotnoj part by 52.3% higher (tfact.>ttable, 7,35>to 3.33, P=99,9%), wet weight 100 two-year seedlings on the land mass has increased by 34.9% compared with the natural background.

1 and 2 - change the height and diameter at root collar two-year seedlings of Scots pine depending on the physical and agrochemical properties of the soil.

The standard output of the seedlings in the soil ranged from 69.2 to 80.2 per cent. The highest yield of seedlings obtained by simultaneously adding peat Borovskoy on the background soil (2767 cisst). According to the "Standards output standard seedlings of trees and shrubs in forest nurseries of the Russian Federation" in the zone of deciduous forests exit standard seedlings of Scots pine is 1600 tesst/ha Additional yield is conventional seedlings when using the proposed method of increasing the fertility of sandy soils amounted to 614...1167 tesst/ha or 38,4...72,9%.

Table 3
Indexes of output seedlings of Scots pine, depending on
soil fertility
Options experienceAll seedlings tesst/haIncluding standard, cisst/haThe output of standard seedlings, %
Natural background (sod-podzolic sandy soil)285064122,5
Natural background+peat+borovska (60 kg/ha A.I)+N603350586of 17.5
Soils (artificial background)3200221469,2
Artificial background+peat+borovska (60 kg/ha A.I)+N6034502767an 80.2

The use of the proposed method of increasing the fertility of sandy soils results in high soil biological activity, improve physical, physico-chemical, water and the physical properties increase fertility, increase in the output of standard planting material

Method of increasing the fertility of sandy soils by adding soil to the soil, characterized in that the quality of soil is a mixture of loess loam, organic soil, peat, borofsky the following content, wt.%: loess loam - 35-40, organic-mineral soil - 45-50, peat - 11-12, borovska - 0,01-0,02.



 

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