A method for comprehensively controlling saline-alkali land for planting crops

Abstract

The invention discloses a method for comprehensive treatment of crop planting in saline-alkali lands, which is used for the treatment and the planting in the saline-alkali lands and comprises the steps: (a) irrigation and salt elimination comprise underground salt elimination and ground surface salt elimination which are completed by three steps, wherein the underground salt elimination is firstly carried out for at least three days, the ground surface salt elimination is then carried out, and the underground salt elimination is repeated for 1-3 days at the third step; (b) the planting and salt reduction are realized by that a large area of suaeda salsa is planted, the irrigation and the salt elimination are conducted continuously before sprouting of the suaeda salsa and within two weeks after the sprouting, and the slightly wet irrigation is carried out at an interval when branching of the suaeda salsa is begun till the end of a growth peak period of the suaeda salsa; and (c) the planting of salt-tolerant crops is completed by that the slightly wet irrigation is continued for at least three days through the underground salt elimination, the large-area ground surface salt elimination is conducted for one time quickly, wheat is then seeded, the slightly wet irrigation is continued within one week after the seeding and after the sprouting, large flow irrigation is carried out for one time before the winter, and the slightly wet irrigation is carried out at an interval till the wheat gets ripe.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land improvement, in particular to a technology for comprehensively controlling saline-alkali land and planting crops in turn. Background technique [0002] With the continuous deepening of economic development, ecological problems have become increasingly prominent, especially the problem of land salinization in coastal areas has become more prominent. The saline-alkali land in coastal areas has the disadvantages of high salinity, low nutrient, large specific gravity and bulk density, low porosity and permeability coefficient, etc., which greatly restricts the ecological construction and agricultural production in coastal areas. Moreover, in saline-alkali land areas, fresh water resources are severely lacking and irrigation conditions are very limited, which are the main factors affecting plant growth. Therefore, in order to improve the ecological problems in saline-alkali land areas, it i...

AI Technical Summary

Problems solved by technology

Since the water absorption process of plants is a continuous process, all irrigation methods in the past, whether watering, sprinkler irrigation, drip irrigation or infiltration irrigation, are intermittent irrigation. All intermittent irrigation methods are difficult to avoid water infiltration, evaporation and ground runoff. Low utilization rate, resulting in waste of water resources

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