A kind of transformation method of saline-alkali land

Abstract

The invention relates to a transformation method for saline-alkali soil. The transformation method for the saline-alkali soil aims at solving the problems of low economic benefits and a poor production capacity of the saline-alkali soil in an existing saline-alkali soil transformation method. The method comprises the steps of step 1, drilling a three-layer water mixed deep well, step 2, a sprinkling irrigation system of reasonable salt leaching, wherein a self-propelled sprinkling irrigation system is constructed around the drilled well, step 3, surface soil improvement within the range of a sprinkling irrigation circle, wherein smashed corn stalks or dune sand obtained from local materials are applied in soil within the range of the sprinkling irrigation system, and rotary tillage is carried out, step 4, mixed forage grass crop planting, wherein oat grass or sorghum sudanense is planted in the middle of every April, and the transformation for the saline-alkali soil is finished. According to the transformation method for the saline-alkali soil, a sprinkling salt leaching technology is adopted, at the same time, a corn stalk improvement soil surface permeability technology is implemented, the soil fertility is improved, the planting of cash crops such as the oat grass, the sorghum sudanense and sunflower is achieved, and a significant effect is achieved that economic benefits are increased by 50-60 times. The transformation method for the saline-alkali soil is used for transforming the saline-alkali soil.

Description

technical field

[0001] The invention relates to a method for transforming saline-alkali land. Background technique

[0002] The Songnen Plain is located in the hinterland of Northeast China, surrounded by mountains on three sides and ridges on one side, forming a saline-alkali basin. The soil is rich in saline-alkali components, with a soluble salt content of more than 0.6% and a pH value of more than 8. It covers an area of ​​200,000 square kilometers, accounting for 2% or more.

[0003] There are saline-alkali lands widely distributed in the Songnen Plain, and the research results of geology, hydrology and soil science on its formation process are highly consistent: on the basis of Cenozoic lacustrine deposition, the hydrological cycle determines the formation. Geology and hydrology focus on the source of salt in Quaternary submerged water and its relationship with saline-alkali land, and soil science focuses on the composition and dynamics of salt ions within the range o...

Examples

specific Embodiment approach 1

[0022] Specific embodiment one: the transformation method of saline-alkali land of this embodiment comprises the following steps:

[0023] Step 1. Drilling deep-water wells for mixing "three waters": at the depth of 170 meters and 70 meters in the well, respectively weld the flower pipes for well drilling, that is, use flower pipes instead of ordinary well pipes at the depths of 70 meters and 170 meters , and fill the gap between the outer wall of the well pipe and the soil with corresponding sand and gravel, fill it to a depth of 20 meters in the well, and fill it with clay above the depth of 20 meters, and drill a deep-water well for mixing three layers of water;

[0024] Step 2. Sprinkling irrigation system for rational salt washing: build a self-propelled sprinkler irrigation system around the wells drilled, and the land area that can be sprayed by each sprinkler irrigation system is 30-130 hectares;

[0025] Step 3. Surface soil improvement within the sprinkler irrigation...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, the water output from the deep water well is 120-170 tons per hour, and the salt content of the water output from the deep water well is less than 0.3%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: This embodiment differs from Embodiment 1 in that: in step 1, the water output from the deep well is 140-150 tons per hour, and the salt content of the water output from the deep well is less than 0.3%. Others are the same as in the first embodiment.

technical field

[0001] The invention relates to a method for transforming saline-alkali land. Background technique

[0002] The Songnen Plain is located in the hinterland of Northeast China, surrounded by mountains on three sides and ridges on one side, forming a saline-alkali basin. The soil is rich in saline-alkali components, with a soluble salt content of more than 0.6% and a pH value of more than 8. It covers an area of ​​200,000 square kilometers, accounting for 2% or more.

[0003] There are saline-alkali lands widely distributed in the Songnen Plain, and the research results of geology, hydrology and soil science on its formation process are highly consistent: on the basis of Cenozoic lacustrine deposition, the hydrological cycle determines the formation. Geology and hydrology focus on the source of salt in Quaternary submerged water and its relationship with saline-alkali land, and soil science focuses on the composition and dynamics of salt ions within the range o...

Examples

specific Embodiment approach 1

[0022] Specific embodiment one: the transformation method of saline-alkali land of this embodiment comprises the following steps:

[0023] Step 1. Drilling deep-water wells for mixing "three waters": at the depth of 170 meters and 70 meters in the well, respectively weld the flower pipes for well drilling, that is, use flower pipes instead of ordinary well pipes at the depths of 70 meters and 170 meters , and fill the gap between the outer wall of the well pipe and the soil with corresponding sand and gravel, fill it to a depth of 20 meters in the well, and fill it with clay above the depth of 20 meters, and drill a deep-water well for mixing three layers of water;

[0024] Step 2. Sprinkling irrigation system for rational salt washing: build a self-propelled sprinkler irrigation system around the wells drilled, and the land area that can be sprayed by each sprinkler irrigation system is 30-130 hectares;

[0025] Step 3. Surface soil improvement within the sprinkler irrigation...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, the water output from the deep water well is 120-170 tons per hour, and the salt content of the water output from the deep water well is less than 0.3%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: This embodiment differs from Embodiment 1 in that: in step 1, the water output from the deep well is 140-150 tons per hour, and the salt content of the water output from the deep well is less than 0.3%. Others are the same as in the first embodiment.