Saline and alkali land improvement method

Abstract

The invention relates to a land transformation method, in particular to a saline and alkali land improvement method. The method comprises the following steps: the saline and alkali land to be improved to is changed into an alternant land for a trench land and ridges; a layer of fine flowing sand or sandy loess with thickness of 3-3.5 cm is evenly laid on the trench land, the saw powder and the chopped grass with thickness of 1-1.5 cm are laid, and the plowing depth is 5-15 cm and is not excessively deep; the trench land is filled with water during the watering process and the ridge cannot be filled with water as possible; the saline and alkali tolerant high-quality corn variety is selected and planted or the agropyron elongatum can be planted; after the young seedlings grow out, the traditional intertillage management is carried out; after the seeds are harvested, the straw returning is carried out; as for the land tillage in the second year, the sand with thickness of 2-5 cm is laid, the saw powder and the chopped grass with thickness of 1-3 cm are laid, then a certain amount of farmyard manure is applied and the rest is the same as the tillage in the first year; as for the land tillage in the third year, the ridges on both sides of the land are respectively taken as the lands with one eighth width during the tractor-ploughing process, so the trench land is increased, and other parts are repeated according to the tillage in the second year; as for the land tillage from the fourth year to the sixth year, the tillage method in the third year is repeated; and the improvement of the whole saline and alkali land is finished after six years. The invention can enable the saline and alkali land to be changed into a fertile land, thereby thoroughly harnessing the saline-alkali land.

Description

technical field [0001] The invention relates to a land improvement method, in particular to a saline-alkali land improvement method. Background technique [0002] The soil in saline-alkali land is compacted, and only some saline-alkali grasses grow, but no crops grow, which is a great waste of land resources. At present, the treatment methods for saline-alkali land at home and abroad mainly include the following types: salt discharge method, salt pressing method, and salt blocking method. The salt discharge method is to flush the saline-alkali land with a large amount of water for a long time, so as to reduce the salt content of the surface layer of the saline-alkali land; the salt pressure method is to use natural precipitation or artificial flood irrigation to promote part of the salt to penetrate downward along the soil pores and cracks , bringing the salinity of the surface soil to the bottom layer with water; although the above method can reduce the salinity of the sur...

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Problems solved by technology

ZL200510016634.7 "A Method for Renovating and Utilizing Saline-Alkali Land", mainly adopts partial trenching on the saline-alkali land to set up an isolation layer, and the method of planting vines with a small amount of

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