Saline-alkali soil improvement method

Abstract

The invention discloses a saline-alkali soil improvement method. The saline-alkali soil improvement method comprises the following steps: a step I of leveling and cultivating, wherein the saline-alkali soil is firstly leveled and then deeply cultivated by 40 centimeters by virtue of deep-ploughing machinery; after being diluted by 100 times with water, green manure nutrient liquor brewed by a three-in-one leavening agent is used for irrigation; a step II of applying fertilizer and cultivating, wherein aeolian sandy soil easily obtained locally is uniformly scattered on the surface of primarily leveled and cultivated soil; a step III of preparing rectangular pieces of land in a field and planting, wherein planting ridge rectangular pieces of land in the field are designed and manufactured; a step IV of subsequently governing, wherein measures of not using fertilizers and substances which are not chemically synthesized in early-stage, middle-stage and later-stage filed management processes after the plants are planted, not watering and uninterruptedly irrigating the green manure nutrient liquor are taken. The saline-alkali soil improvement method disclosed by the invention can be used for strengthening soil fertility, and changing physical and chemical properties and microbial activity of the soil.

Description

technical field [0001] The invention relates to agricultural technology, in particular to a method for improving saline-alkali land. Background technique [0002] Soil salinization is a worldwide problem. The area of ​​saline soil in the world is about 1 billion hectares. my country has 99.13 million hectares, or about 1.47 billion mu. More than 100 cities in the country are located in saline-alkali distribution areas. Nearly 500 million mu of farmland has been lost or abandoned due to salinization, mainly concentrated in the arid and semi-arid regions of North China, Northwest China and Northeast China. In addition, during the cultivation process, the long-term excessive application of chemical fertilizers leads to the intensification of secondary salinization of the soil, serious compaction, and the continuous expansion of salinized and alkalized soil. [0003] The area of ​​salinized land in the Hu, Bao and E regions of Inner Mongolia is 47.45 million mu. Due to the irra...

AI Technical Summary

Problems solved by technology

In short, judging from the currently widely used saline-alkali land improvement methods in China, there are mainly problems such as high input costs, slow improvement speed, and it takes 3-5 years to get results, and it is difficult to fully promote them.