Method for improving soil fertility of saline-alkali land by planting erect milkvetch

Abstract

The invention is applicable to the technical field of saline-alkali land improvement, and provides a method for improving soil fertility of saline-alkali land by planting erect milkvetch. The method comprises the steps of land selection, wherein the saline-alkali land which is smooth, has the pH value of 9.5-10.0, has the salt content of 0.3%-0.4%, and does not store water is selected; deep ploughing and irrigation salt leaching, wherein harrowing is conducted to loosen surface soil, and a spray irrigation mode is utilized to conduct salt leaching on the ploughed land; sowing, wherein 1-2 cm of soil covers the land after sowing, phosphate fertilizer serves as base fertilizer, and pressing is conducted in the next spring at the right time; fertilizing improving management, wherein nutrientslike calcium, phosphorous, molybdenum and boron are properly supplied, weeding is timely conducted, diseases and insect pests are prevented, and ponding is drained; ripeness fertilizer retaining treatment, wherein erect milkvetch can be directly subjected to green manuring to serve as base fertilizer, or can be turned over and then serves the base fertilizer. In this way, the fertility improvingand soil improving effect on the saline-alkali land is obvious, and the subsequent crop growth is guaranteed.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land improvement, in particular to a method for improving soil fertility of saline-alkali land by planting sandawang. 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. The fundamental reason for the formation of saline-alkali soil is poor moisture status, so in the early stage of improvement, the focus should be on improving the soil moisture status. G...

AI Technical Summary

Problems solved by technology

And long-term observations show that the current improvement of saline-alkali land has defects such as high cost of improvement, long cycle, and slow effect.

[0003] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

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