Saline-alkali soil deep-improving method by chemical-biological technology

Abstract

A saline-alkali soil deep-improving method by chemical-biological technology includes steps of S1, improving chemical components of the saline-alkali soil by chemical measures, firstly, adding humic acid fertilizer into the saline-alkali soil, then adding chemically acidic fertilizer into the saline-alkali soil, applying physiologic acidic fertilizer, and finally adding mineral chemical fertilizer into the saline-alkali soil; S2, improving the saline-alkali soil by biological measures, firstly, planting suaeda salsa of euhalophyte on the saline-alkali soil to be treated, or planting scutellaria strigillosa hemsl when salt content of the saline-alkali soil ranges from 0.2% to 0.3%. The saline-alkali soil deep-improving method provides a feasible, economic and efficient scheme for improving the saline-alkali soil in coastal regions, improvement time is short, effect is good and no backflow is caused after improvement.

Description

technical field [0001] The invention relates to a method for improving saline-alkali land, in particular to a method for deeply improving saline-alkali land by integrating biological technology and chemical technology. Background technique [0002] With the deterioration of the ecological environment, soil salinization is expanding at an unprecedented speed. Therefore, rational use of saline-alkali land, thorough improvement of saline-alkali land, and cultivation of saline-alkali-resistant plant varieties will be the future development direction. [0003] As far as my country is concerned, the total population has reached 1.3 billion, and the total cultivated land area is less than 2 billion mu, but the total area of ​​saline-alkali land has reached 2.045 billion mu, and its area is constantly expanding; the per capita cultivated land and fresh water resources in my country are far lower In addition, in the process of modernization, arable land shrinking, fresh water polluti...

AI Technical Summary

Problems solved by technology

However, this method also has obvious defects: it is easy to cause secondary compaction of the soil, and the saline-alkali backlash is serious

Biological improvement requires the smallest investment, but the requirements for salt-tolerant plants are relatively high. It is necessary to have a better understanding of the salt-tolerant mechanism of halophytes, and biological improvement is often slow to take effect

[0017] Therefore, the effect of adopting the traditional single governance method is not ideal, and due to the serious mutual constraints among the various methods, simply integrating the traditional single governance method will only be time-consuming and laborious, and the effect will be extremely slow, and even some It may exacerbate the degree of saline-alkali land (for example, when chemical fertilizer improvement conflicts with biological improvement, it may lead to the death of organisms, and the absorbed salt re-enters the soil; when physical improvement conflicts with irrigation salt, it may cause the groundwater table of saline-alkali land to rise, seawater intrusion occurs)

Also because of this, there are many technical difficulties in combining various means to treat saline-alkali land