Method for improving alkaline land and recovering plant cover by overlapping the earth's surface with superficial lamella extra-soil

Abstract

The invention relates to a method for improving saline-alkali land and restoring vegetation by covering land surface with shallow foreign soil, which aims to restore the vegetation ecosystem of saline-alkali land. The method comprises the following steps: the area of the saline-alkali land needing vegetation restoration is determined first; the amount of needed foreign soil is calculated according to the coverage height of the foreign soil; off-site foreign soil is dug and transported to the severe saline-alkali land needing improvement by use of machinery, and is placed in separate piles on standby; in early spring or autumn, the high-quality foreign soil is spread on the saline-alkali land according to the salinization degrees differentiated through the original vegetation characteristics, wherein the largest amount of the foreign soil is spread on saline-alkali bare land; a medium amount of the foreign soil is spread on seepweed communities and Chloris virgata ruins; the smallest amount of the foreign soil is spread on the communities of Guinea grass together with forbs thereof; and closed management is carried out on the basis of the previous steps, and good vegetation landscapes can be restored in the same year .

Description

Technical field: [0001] The invention uses a relatively small amount of alien soil to cover the surface of the saline-alkali land, and then quickly restores the vegetation ecosystem of the saline-alkali land. Background technique: [0002] my country is a big country with agriculture and animal husbandry, and the development of agriculture and animal husbandry is one of the important components of national economic development. Soil desertification and soil salinization are the main soil problems facing our country. my country has more than 20 million hectares of salt wasteland and 6.7 million hectares of salinized land. These lands cannot be cultivated normally, and even the growth of forage plants has problems. Saline-alkali soil refers to harmful salts such as potassium, sodium, calcium, and magnesium chlorides, sulfates, and bicarbonates in the soil; or the soil has little salt content, but the soil exchangeable sodium accounts for cation exchange capacity. a certain p...

AI Technical Summary

Problems solved by technology

However, these methods, or the required cost is too high, or the vegetation restoration time is too long, can not meet the purpose of rapid restoration of vegetation under limited economic conditions.

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