A method for repairing bald spots in alpine lakeside saline-alkali wetland

Abstract

The invention belongs to the field of vegetation restoration, in particular to a method for restoring bald spots in alpine lakeside saline-alkali wetlands. It consists of the following steps: 1. Ridges on the surface of the bald spot treatment area; 2. Add 5-10 cm foreign soil to the bald spot treatment area; 3. Supplement grass in the bald spot treatment area; 4. Bald spot treatment The area is covered with film for insulation. The invention solves the problem that the high salinity and alkalinity of the bald spots in the grasslands in the alpine lakeside area hinders the germination of forage seeds and the high cold and low temperature in the early stage of forage growth, so that the temperature of the bald spot repair area is increased by 1-3°C; the number of seedlings can reach more than 7,000 plants / m2 , which is similar to the germination rate of pasture planted in farmland soil, the coverage is increased by 3 to 5 times, reaching 50%; the salinity is reduced by 20%, the water conservation rate is increased by 10%; the biomass on the ground is increased by 10 times, and the annual pasture output reaches 38.5kg / mu, and finally achieve the purpose of restoring bald spots in alpine lakeside wetlands.

Description

1. Technical field [0001] The invention belongs to the field of vegetation restoration, in particular to a method for restoring bald spots in alpine lakeside saline-alkali wetlands. 2. Background technology [0002] At present, the vegetation restoration technology of alpine lakeside wetland degraded grassland is limited to restoring vegetation status through mechanical or artificial reseeding. This technology is more effective for non-saline-alkali grasslands with 20-60% of the original grassland vegetation, while For the treatment of bald spot areas with high salinization degree and less than 10% of the original vegetation, the technology of supplementary seeding treatment is almost ineffective. The main reasons for this result are as follows: 1. The saline-alkali bald spot area Salinity and alkalinity hinder the seedling growth of re-sowing forage seeds; 2. Saline-alkali water and high cold and low temperature jointly inhibit the growth of re-sowing. 3. Contents of the...

AI Technical Summary

Problems solved by technology

The invention solves the problems of high salinity and high salinity in the bald spots of grasslands in the alpine lakeside area, hindering the germination of forage grass seeds, and the high cold and low temperature in the initial stage of forage growth, and increases the temperature of the bald spot restoration area by 1-3°C; the number of seedlings can reach 7,000 plants / m2 or above, similar to the germination rate of forage grass planted in farmland soil, the coverage increased by 3 to 5 times, reaching 50%; the salinity decreased by 20%, the water conservation rate increased by 10%; the aboveground biomass increased by 10% Accompanied, the pasture production reached 38.5㎏ / mu that year, and finally achieved the purpose of restoring bald spots in alpine lakeside wetlands