New soil improvement method of clayey tobacco-planting soil

Abstract

The invention discloses a new soil improvement method of clayey tobacco-planting soil, which comprises the following steps of: A) when the cosmid (particle size is less than 0.002mm) content of a tobacco-planting soil mechanical composition is more than 29%, and the sand particle (particle size is 0.02mm to 2mm) content is less than 49%, needing improvement; B) taking sand soil or river soil with the sand particle size of 0.02mm to 2mm and the sand particle content of more than 80% as improved new soil; C) taking field tillage layer soil (the depth is less than or equal to 30cm) needing to be improved and mixing with the new soil in different proportions in order to achieve the proportion of the new soil with the sand particle content of more than 55% and the cosmid content of less than 23% in the mixed soil to calculate the amount of the new soil; and D) the new soil of which the amount is determined by the step C) is evenly spread over a field needing to be improved and ploughing, wherein the ploughed depth is 30cm. According to the method, the tobacco-planting soil texture can be quickly adjusted, so that the soil type is changed from clayey soil to sandy loam, the aeration and drainage capacity and fertilizer efficiency utilization of soil are increased, thereby being favorable for improving a flue-cured tobacco rhizosphere soil environment.

Description

Technical field: [0001] The invention relates to a soil improvement method for sticky tobacco planting soil. Background technique: [0002] Tobacco is very sensitive to soil conditions, and the physical and chemical properties of soil are closely related to the yield, quality and style of tobacco. Soil texture determines and affects factors such as soil water storage, water conduction, fertilizer retention, fertilizer supply, heat preservation and temperature conduction performance, and soil tillability, especially the formation of tobacco leaf quality style. Due to the high clay content, small intergranular spaces, poor air permeability and low microbial activity in clay soil, the cations adsorbed by the clay are not easy to release, and the organic matter decomposes slowly, which is not conducive to the growth of roots and tobacco plants. If the nitrogen fertilizer is improperly applied, it is easy to form green and long spurs, not easy to fall yellow, thick leaves, rough...

AI Technical Summary

Problems solved by technology

However, the effect of adding too little sand is not obvious, and too much sand will increase the transportation cost and workload, so it is not suitable for use in mountainous areas and dam areas where river sand resources are scarce.

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