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Compound ecological improvement method for severe soda saline-alkali soil

A soda saline-alkali land, heavy-duty technology, applied in the direction of soil preparation, climate change adaptation, agricultural machinery and implements, etc., can solve the problems of water resource waste, high application amount, high cost, etc.

Inactive Publication Date: 2020-03-27
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of high cost and waste of water resources caused by using a high amount of improver in the existing improvement method of heavy soda-alkali land, and to provide a compound ecological improvement method of heavy soda-saline-alkali land

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Specific implementation mode one: the compound ecological improvement method of severe soda saline-alkali land in this implementation mode is carried out according to the following steps:

[0023] 1. The first stage:

[0024] (1) In the autumn of severe soda saline-alkali land and "alkali-spotted land", field plots shall be constructed according to paddy field utilization specifications, water intake and drainage channels shall be built, ring ditches with a width of 1-2m and a depth of 1-1.5m shall be dug, and dams shall be excavated. Use agricultural machinery to turn the fields shallowly for 15 to 18 cm, and level them for later use;

[0025] (2) In the autumn of the current year or the spring of the second year, apply the gypsum modifier evenly into the established field according to the application rate of 5-10t / ha, and mix it into the 1-18cm soil layer by rotary tillage;

[0026] or without the application of modifiers;

[0027] (3) In the spring of the second ye...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment is different from Embodiment 1 in that the second stage is repeated for 1 to 3 years, that is, the complex ecological improvement of the heavily soda saline-alkali land is completed. Others are the same as the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the herbivorous fish described in step (4) is grass carp, and the omnivorous fish is carp or gibel carp. Others are the same as those in Embodiment 1 or 2.

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PUM

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Abstract

The invention discloses a compound ecological improvement method for severe soda saline-alkali soil and relates to a saline-alkali soil improvement method. The invention aims to solve the technical problems of high cost and water resource waste caused by the adoption of a modifier with a high application amount in an existing severe soda alkaline land improvement method. The method comprises the following steps: (1) digging a circular groove, and shallowly ploughing a field; (2) in autumn of the same year or spring of the second year, applying a gypsum modifier to the field blocks; or not applying a modifying agent; (3) in spring of the second year, draining water to soak the field or not draining water to soak the field; (4) selecting fish and crabs; (5) performing stocking management; and (6) fishing fish and crabs, so as to finish improvement. According to the method, a 10t / ha modifier is applied in the first stage, and draining is carried out once; 78.6 kg / ha adult crabs are harvested; the pH value of the soil of 0-15 cm is reduced to 9.25 from 10.0, and the salt content is reduced to 1.05% from 1.2%. In the first stage, the modifier is not applied, water is not discharged forfield steeping, and the development cost is reduced; 42.6 kg / ha adult crabs and 272 kg / ha fish are harvested. The pH value of 0-15cm soil is reduced to 9.15 from 9.50, and the salt content is reducedto 0.83% from 1.0%. The invention belongs to the field of saline-alkali land improvement.

Description

technical field [0001] The invention relates to a method for improving saline-alkali land. Background technique [0002] The distribution area of ​​soda saline-alkali land in the west of Songnen Plain is about 3.73 million ha, and the soil shows "three highs and two lows" (ie, high pH, ​​high soda content, high exchangeable sodium content, low permeability, and low nutrient availability). Large areas of severe soda saline-alkali land and "alkali-spotted land" are left idle and abandoned because it is difficult to develop and utilize by conventional means or the cost of development and utilization is too high, resulting in a great waste of land resources. In recent years, the development and utilization of soda saline-alkali land by improving soil-growing rice through physical, chemical and biological means has been developed. [0003] Chemical improvement is one of the main ways for the heavily soda-alkali land that was difficult to utilize under past production conditions....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00A01K61/10A01K61/59
CPCA01B79/00A01K61/10A01K61/59Y02A40/81
Inventor 陈国双刘宏远李秀军鲁新蕊杨富亿
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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