Soil improvement method for restoring saline-alkali soil based on biological method

Abstract

The invention discloses a soil improvement method for restoring saline-alkali soil based on a biological method, and relates to the technical field of soil improvement. In order to solve the problem that ardealite easily causes soil heavy metal pollution, the method specifically comprises the following steps of preparing the saline-alkali soil; dividing the saline-alkali soil into regions, and detecting the PH value and the EC value of the soil in each region; digging pits in the surface of the saline-alkali soil, and leaching the saline-alkali soil in rainy seasons; uniformly spreading diluted microbial fertilizer on the surface of the saline-alkali soil and in the pits; performing deep ploughing and deep scarification of saline-alkali soil; performing land leveling; reasonably distributing and planting salt-tolerant crops; and performing intertillage of the saline-alkali soil before the salt-tolerant crops are reasonably distributed and planted. The depth of the deep ploughing and deep scarification saline-alkali soil is 50-60 cm. The saline-alkali soil subjected to biological improvement has the effects of being durable and stable in desalination and beneficial to water and soilconservation and ecological balance, microbial activities are promoted, the physical and chemical properties of the soil are further improved, and heavy metal pollution of the soil cannot be caused.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a soil improvement method for restoring saline-alkali land based on a biological method. Background technique [0002] Land salinization not only endangers the soil conditions on which crops depend for survival, but also harms the growth of crops, resulting in the lack of seedlings or death of crops, thus hindering the development of agricultural production. Soil salinization is an important limiting factor for the development of local agricultural economy. Saline-alkali land Generally, it is characterized by low temperature, thin soil, and poor structure. There are many improvement methods for saline-alkali land, mainly including engineering improvement, chemical improvement, biological improvement, and physical improvement, among which engineering improvement is the most common improvement method. The main work content of the project improvement is to build an irrigati...

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Problems solved by technology

The improvement agent for saline-alkali land in the above-mentioned patent and its preparation method and application have the following deficiencies: phosphogypsum, one of the raw materials of the improvement agent, contains heavy metals, radioactive elements and other substances, and the heavy metals entering the soil have hysteresis, concealment and long-term properties. The heavy metal pollution in the soil around the storage site is becoming more and more serious. Once the soil is polluted by heavy metals, it is generally difficult to eliminate

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