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Method for controlling salinity of saline and alkaline land

A saline-alkali land and salt content technology, which is applied in the direction of soil preparation methods, applications, agricultural machinery and tools, etc., can solve the problem of salt accumulation on the ridge surface, achieve the effects of fertilizing the soil, reducing ground evaporation, and improving the local salinization environment

Active Publication Date: 2015-09-09
INST OF SOIL FERTILIZER & WATER SAVING AGRI GANSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, there are also some problems, such as the phenomenon of salt accumulation on the ridge surface, especially in the salinized cultivated land.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the land is leveled in spring, spread the crushed wheat straw evenly on the surface, and bury the straw 20cm below the plow layer when ridging to form a salt barrier layer with a thickness of about 10cm. The amount of straw burying is 7500kg / hm 2 , adjust the carbon-nitrogen ratio by adding 1 kg of urea per 100 kg of straw. 5 to 7 days before corn sowing, use a corn ridge filming machine to complete the ridge filming operation at one time. The ridge width is 60cm, the furrow width is 40cm, the ridge height is 20cm, and the film is covered on the ridge. Corn is sown in mid-April, planted in 2 rows on the ridge surface, the row spacing is 50cm, the plant spacing is 25cm, and the sowing density is 67,500 plants / hm 2 . The amount of fertilizer applied is 45t / hm of agricultural fertilizer 2 , all base application; chemical fertilizer N 375kg / hm 2 , P2O5 120kg / hm 2 , of which all phosphate fertilizers are used as base fertilizer, 40% of nitrogen fertilizer is us...

Embodiment 2

[0027] After the land is leveled in spring, spread the crushed wheat straw evenly on the surface, and bury the straw 20cm below the plow layer when ridging to form a salt barrier layer with a thickness of about 5cm. The amount of straw burying is 3750kg / hm 2 , adjust the carbon-nitrogen ratio by adding 1 kg of urea per 100 kg of straw. Other ridging, sowing, fertilization, irrigation, and field management measures are the same as in Example 1. The results show that compared with the traditional method of flat cropping and flood irrigation, the corn yield increased by 6.8%, the salt content of the plow layer soil decreased by 22.5%, and the water saving was 80m3. 3 / mu.

Embodiment 3

[0029] After the land is leveled in autumn, spread corn stalks crushed in advance evenly on the surface, and bury the stalks 20cm below the plow layer when ridging to form a salt barrier layer with a thickness of about 10cm. The amount of burying straw is 7500kg / hm 2 , adjust the carbon-nitrogen ratio by adding 1 kg of urea per 100 kg of straw. Other ridging, sowing, fertilization, irrigation, and field management measures are the same as in Example 1. The results show that compared with the traditional method of flat cropping and flood irrigation, the corn yield increased by 19.7%, the salt content of the plow layer soil decreased by 28.6%, and the water saving was 80m3. 3 / mu.

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Abstract

The invention discloses a method for controlling salinity of a saline and alkaline land. The method comprises the steps of: adopting a way of covering ridges with films and putting straws below ridges, that is to say, paving straws below ridges, and covering the ridges with films to prevent salinity of soil from moving upwards. The provided method for controlling salinity of the saline and alkaline land has the beneficial effects that: 1) straws are paved below the ridges to prevent salinity from moving upwards; 2) the ridges are covered with films, so that effects of temperature increase and preservation of soil moisture are obtained, floor evaporation is reduced, and salinity is prevented from moving towards the earth surface along with capillary water; 3) straws deeply buried in soil can generate organic acid and active organic substances in the decay process, so that the soil can be fertilized, and local salinization environment is improved.

Description

technical field [0001] The invention relates to the field of land improvement, in particular to a method for salt resistance and control in saline-alkali land. Background technique [0002] The lack of water resources in irrigated areas of arid oasis in northern China is a major factor affecting crop yield and fertilizer use efficiency. Ridge planting and furrow irrigation have reformed the surface irrigation technology, organically combining ridge planting technology and furrow irrigation lateral seepage technology, reducing soil water evaporation and deep irrigation water leakage, and improving the utilization rate and utilization efficiency of irrigation water. It is a simple, practical, energy-saving Water-efficient farmland water-saving cultivation technology. However, in the actual application process, there are also some problems, such as the phenomenon of salt accumulation on the ridge surface, especially in the salinized cultivated land. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00A01B79/02
Inventor 杨思存霍琳王成宝姜万里
Owner INST OF SOIL FERTILIZER & WATER SAVING AGRI GANSU ACAD OF AGRI SCI
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