Soil improvement method

Abstract

The invention belongs to the field of soil improvement, and particularly relates to a soil improvement method which includes the steps: performing organic matter biological enhanced humifying improvement on soil at the early stage of crop cultivation; performing organic matter balance mineralization improvement on the soil at the middle and later stage of crop cultivation. The soil improvement method can promote organic matters to enter the soil to form humic substances at the early stage of crop cultivation, redundant nutrients are reserved, soil organic matter balance mineralization is facilitated under guarantee of suitable time and correct method at the middle and later stage of crop cultivation, the nutrients are released again, and balance of supply and demand of the nutrients in theoverall process of plant growth is ensured. According to the soil improvement method, a soil granular structure and a soil microbial community structure can be improved when soil fertility is effectively improved, fertilizer consumption is reduced, and high-yield and high-quality agricultural production is achieved.

Description

technical field [0001] The invention belongs to the field of soil improvement, in particular to a soil improvement method. Background technique [0002] As the basis of soil fertility, soil organic matter is the foundation of soil fertility, and organic matter in the soil needs to be transformed into nutrients and humus through mineralization and humification in order to exert "true" fertility. As we all know, the mineralization and humification of organic matter in soil occur at the same time, that is, they are relatively opposite, but also related to each other, that is, two processes that are independent and infiltrated. There is no strict boundary between them, and they change with the change of conditions. Mutual transformation; the mineralization process is the premise of the humification process, and the humification process is a partial result of the mineralization process, and the product of the humification process—humus is not static, it can be released through th...

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Problems solved by technology

[0003] Although organic matter provides the nutrients needed for growth and development of plants and soil microorganisms through the mineralization process, if the mineralization process is too strong, the organic matter decomposes too quickly, and the large amount of inorganic nutrients released by the decomposition cannot be absorbed and utilized by plants in time and will be lost with water. It is difficult to form humus, and at the same time, the humus formed by humification will also decompose, and more nutrients will be lost, causing damage to the soil structure and declining soil fertility; if the humification of organic matter is too strong, it will be available for plant growth. Insufficient nutrients, on the contrary, a large amount of humus is formed, causing the accumulation of organic matter and forming a large amount of peat. Although there are a large amount of nutrients, they cannot be absorbed and utilized by plants.

[0004] At present, in soil improvement, most of the methods for increasing soil organic matter from external sources are the use of organic manure, planting green manure or returning straw to the field, etc., and these methods only ensure a stable source of soil organic matter, because the selection of organic matter types has not been carried out. Scientific deployment does not fully consider the difference in the impact of different sources of organic matter on the change of soil organic matter and how to effectively regulate the process of mineralization and humification of exogenous organic matter in the soil, resulting in poor use of existing soil improvement technologies Therefore, how to control the balance between the humification and mineralization of organic matter in the soil by biological means under the premise of adding suitable types of organic matter to the soil is an important prerequisite to ensure the realization of soil improvement goals.

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