Four-dimensional saline-alkali soil improvement method

Abstract

The invention discloses a four-dimensional saline-alkali soil improvement method which includes the steps: M1 taking local rice varieties, water-heat conditions and cultivation planting modes as a base to perform a block experiment, and screening suitable rice varieties and matched planting modes; M2 cultivating rice in an upland rice direct seeding mode and a paddy rice transplanting mode; M3 applying plant growth regulators; M4 applying a soil improvement agent; M5 circulating water, soil, fertilizer and pesticides and intelligently controlling a plant growth process by the aid of a micro-sensor and an NS-IOT communication technology. According to the method, a straw returning method capable of reducing soil slat is utilized, and the method includes influences of the straw returning method on different straw returning methods, so that the salt content of a land is reduced in an optimal straw returning mode.

Description

technical field [0001] The invention relates to the technical field of crop cultivation, in particular to a method for improving saline-alkali land in four dimensions. Background technique [0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country is the largest 99.13 million hectares. The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive. [0003] Saline-alkali soil is a kind of soil that is "sick" due to excessive salt content or strong alkalinity. The grading indicators of saline-alkali land are as follows: mildly salinized soil, the soil salt content is...

AI Technical Summary

Problems solved by technology

[0014] Predecessors have done a lot of work on saline-alkali soil improvement. The improvement methods are mainly divided into two categories. One is to protect vegetation or introduce saline-alkali-resistant plants to allow them to recover naturally.

The second is physical (covering with cement, returning straw to the field, entraining sand, burying straw, etc., and chemical (polymer modifier, phosphogypsum, etc.) methods to make the soil properties significantly change in a short period of time, making it suitable for plant growth. So as to achieve the purpose of controlling salinity, the disadvantage is that the cost is too high and it is difficult to promote it in a large area

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