CN-121533215-B - Method for repairing grassland saline-alkali soil and grassland saline-alkali soil by using plant materials

Abstract

The invention discloses a method for repairing grassland saline-alkali spots and grassland saline-alkali spot soil by using plant materials. The invention provides a method for repairing saline-alkali soil, which comprises the following steps of sequentially applying organic fertilizer, ploughing, applying amino acid water-soluble fertilizer and paving plant materials to the saline-alkali soil. The invention has the advantages of simple construction and low cost, is a green sustainable mode, and can realize the recycling of waste resources. The invention establishes a method for recovering the saline-alkali spots of the degraded meadow grassland near nature, and has important practical significance for improving the productivity of the grassland, improving the ecological environment of the grassland and promoting the healthy development of grassland industry.

Inventors

• Chi Xiaoxue
• Guo Siqun
• CAO WEI
• WANG CHANG
• ZHANG HAIFANG
• LI XIN
• CHEN DI
• LI YANHONG

Assignees

• 呼伦贝尔市林业和草原科学研究所
• 农业农村部环境保护科研监测所

Dates

Publication Date

20260505

Application Date

20260121

Claims (4)

1. 1. A method for repairing saline-alkali soil comprises the following steps of sequentially applying organic fertilizer, turning over, applying amino acid water-soluble fertilizer and paving plant materials, wherein the plant materials are pasture, the method comprises the steps of paving the plant materials in two layers, namely, the lower layer close to the saline-alkali soil surface and the upper layer close to the open air, the pasture paved on the lower layer is cut into sections with the length of 3cm, fresh weight of 2000g is paved per square meter, the pasture paved on the upper layer is uncut pasture, fresh weight of 550g is paved per square meter, the pasture is collected from a land block with vegetation within 2km around the saline-alkali soil, stubble is reserved for 5-6cm when the pasture is harvested, and the pasture is harvested for use in the day.
2. 2. A method for repairing saline-alkali soil comprises the following steps of sequentially applying organic fertilizer, turning over, applying amino acid water-soluble fertilizer and paving plant materials, wherein the plant materials are pasture, the method comprises the steps of paving the plant materials in two layers, namely, the lower layer close to the ground of the saline-alkali soil and the upper layer close to the open air, wherein the pasture paved on the lower layer is cut into sections with the length of 3cm, the fresh weight of 2000g is paved per square meter, the pasture paved on the upper layer is non-cut pasture, the fresh weight of 550g is paved per square meter, the pasture is collected from a land block with vegetation within 2km around the saline-alkali soil, the stubble is left for 5-6cm when the pasture is harvested, and the pasture is harvested for use in the day.
3. 3. Use of the method of claim 1 or 2 for improving saline-alkali spots.
4. 4.A method for repairing saline-alkali soil and saline-alkali soil comprises the following steps: (1) Sequentially applying organic fertilizer, ploughing, and applying amino acid water-soluble fertilizer to the saline-alkali soil; (2) After the step (1) is completed, the land crust on the saline-alkali soil spots and the land crust on the normal land are mutually replaced, so that the normal land crust with the saline-alkali soil spots and the saline-alkali soil spot with the normal land crust are obtained; (3) After the step (2) is completed, the saline-alkali spot land crust on the normal land with the saline-alkali spot land crust is subjected to the following operation of paving plant materials; The land parcels with vegetation are arranged in a range of 2km around the saline-alkali soil, and the land parcels refer to soil with a depth of 15-20 cm from the soil surface layer; The plant material is pasture, the plant material is laid in two layers, the lower layer close to the saline-alkali soil surface and the upper layer close to the open air are laid, the pasture laid in the lower layer is cut into sections with the length of 3cm, 2000g fresh weight is laid per square meter, the pasture laid in the upper layer is uncut pasture, 550g fresh weight is laid per square meter, the pasture is collected from a land with vegetation within 2km around the saline-alkali soil, stubble is left for 5-6cm when the pasture is harvested, and the pasture is harvested for use in the day.

Description

Method for repairing grassland saline-alkali soil and grassland saline-alkali soil by using plant materials Technical Field The invention belongs to the technical field of biology, in particular to the field of soil preparation in agriculture or forestry, and relates to a method for repairing grassland saline-alkali soil and grassland saline-alkali soil by using plant materials. Background The grassland saline-alkali spots are plaque-like areas which are degraded and form bare or sparsely covered vegetation due to excessive accumulation of soil salt in the grassland ecological system, and are one of important types of grassland degradation. Because of drought, little rain and strong evaporation, the salt content in the underground is accumulated along with the rising of water vapor to the surface layer, water is easy to accumulate in the low-lying part of the terrain, the salt content remains after the evaporation of the water, the mineralization degree of the underground water is high, and a large amount of salt content is brought in when the soil is supplied, so that the saline-alkali soil is formed. At present, methods of salt irrigation, salt removal, transplanting, soil covering, chemical improvement and the like are mainly adopted for treating the saline-alkali spots, but the problems of high cost, complex procedures and high implementation difficulty generally exist. Disclosure of Invention The invention aims to provide a method for repairing grassland saline-alkali soil and grassland saline-alkali soil by using plant materials. The invention provides a method for repairing saline-alkali soil, which comprises the following steps of sequentially applying organic fertilizer, ploughing, applying amino acid water-soluble fertilizer and paving plant materials to the saline-alkali soil. The restoration method can be used for directly restoring the saline-alkali soil on the saline-alkali soil. The restoration method can also be used for restoring the saline-alkali soil obtained from the saline-alkali soil, and the restored soil can be transplanted to other land areas. The restoration method can also be used for restoring the saline-alkali soil on the land where the saline-alkali soil is transplanted. The plant material is pasture, the laying mode is that the pasture is divided into two layers, the lower layer close to the saline-alkali soil surface is the upper layer close to the open air, the pasture laid on the lower layer is cut into 3cm sections, 2000g of fresh weight is laid per square meter, and the pasture laid on the upper layer is non-cut pasture, and 550g of fresh weight is laid per square meter. The plant material is fallen leaves, and the laying thickness is 2-3cm. The plant material is a straw curtain, and the paving thickness is 2-3cm. The effect of repairing the saline-alkali soil is represented by improving the plant community height on the saline-alkali soil and/or improving the plant community coverage on the saline-alkali soil and/or improving the plant community density on the saline-alkali soil. The effect of the restoration of the saline-alkali soil is that the plant community height on the saline-alkali soil is improved and/or the plant community coverage on the saline-alkali soil is improved and/or the plant community density on the saline-alkali soil is improved compared with the restoration. The effect of repairing the saline-alkali soil is that after finishing laying plant materials for 2 months, the plant community height on the saline-alkali soil reaches more than 3cm and/or the plant community coverage on the saline-alkali soil reaches more than 8% and/or the plant community density on the saline-alkali soil reaches more than 5 plants/m 2. The effect of repairing the saline-alkali soil is that after finishing laying plant materials for 2 months, the plant community height on the saline-alkali soil reaches more than 5cm and/or the plant community coverage on the saline-alkali soil reaches more than 10% and/or the plant community density on the saline-alkali soil reaches more than 5 plants/m 2. The effect of repairing the saline-alkali soil is that after finishing laying plant materials for 2 months, the plant community height on the saline-alkali soil reaches more than 5cm and/or the plant community coverage on the saline-alkali soil reaches more than 10% and/or the plant community density on the saline-alkali soil reaches more than 6 plants/m 2. The effect of repairing the saline-alkali soil is that after laying plant materials for 1 year, the plant community height on the saline-alkali soil reaches more than 18cm and/or the plant community coverage on the saline-alkali soil reaches more than 30% and/or the plant community density on the saline-alkali soil reaches more than 8 plants/m 2. The effect of repairing the saline-alkali soil is that after laying plant materials for 1 year, the plant community height on the saline-alkali soil reaches more than 58cm and/or the plant comm