A method of planting flue-cured tobacco after improving acidic red loam soil in Yunnan

Abstract

The invention relates to a method for planting flue-cured tobacco after improving the acidic red loam soil in Yunnan. The method of the invention includes the following contents: 1) stacking of organic fertilizer nutrient soil; 2) intensive cultivation and ridging preparation of tobacco fields; Narrow plant cultivation; 4) pulling wires to make ponds; 5) planting with high stems and deep water; 6) mulching with plastic film. The present invention adopts the double-layer one-time application technology of slaked lime, cooperates with organic fertilizer nutrient soil application, wide-row and narrow-plant cultivation, high-stem open-water deep planting technology to improve the improvement effect and planting technology, and rapidly increases the pH value of acidic red soil for planting flue-cured tobacco in Yunnan. To the range suitable for flue-cured tobacco growth, improve fertilizer utilization, reduce chemical fertilizer application and environmental pollution, reduce flue-cured tobacco leaf spot and rhizome disease, reduce the activation degree of heavy metal ions iron, manganese, and aluminum in the soil, reduce the absorption of tobacco plants, and improve the quality of tobacco leaves. The safety, yield and quality of tobacco can increase the income of tobacco farmers, and the economic, social and ecological benefits are very significant.

Description

technical field [0001] The invention belongs to the field of plant production biotechnology, in particular to the technical field of a method for improving the planting of flue-cured tobacco after improving the soil quality of acidic red loam in Yunnan. Background technique [0002] As we all know, Yunnan Province is the largest tobacco province in my country, and Yunnan Tobacco has always been in a leading position in the national tobacco industry. In fact, the unique acidic red loam soil (pH value 4.5-5.5) in Yunnan is not suitable for high-quality tobacco leaves (pH requirements In 5.5 ~ 6.5) production requirements. Soil is the carrier for tobacco to absorb nutrients and water. Various environmental conditions also affect the growth and development of tobacco through soil. Soil pH is an important characteristic of soil physical and chemical properties. There are three main types of soil for tobacco planting in Yunnan Province: red soil, purple soil and paddy soil. Among ...

AI Technical Summary

Problems solved by technology

There are three main types of soil for tobacco planting in Yunnan Province: red soil, purple soil and paddy soil. Among them, red soil occupies the largest area, accounting for about 45% of the tobacco planting area. Yunnan red soil presents the characteristics of "sour and thin". The content of organic matter is low, and the pH of the soil is too low, which leads to a decrease in fertilizer utilization rate, aggravation of tobacco leaf spot and rhizome disease, and soil acidification can also increase the activation of heavy metal ions iron, manganese, and aluminum, which promotes the absorption of tobacco plants and increases the yield of leaves. Heavy metal content affects the growth and development of flue-cured tobacco and reduces the yield, quality and safety of tobacco leaves

[0003] In addition, the current improvement of acidic red loam in Yunnan mainly adopts the method of spreading slaked lime, 50% of which is applied before plowing, and 50% after plowing and before the whole border. The third is that the improvement effect is poor, and too much slaked lime will affect the absorption of potassium and magnesium by tobacco plants, and will also cause boron deficiency in tobacco plants; at the same time, excessive use of slaked lime will strengthen the mineralization of soil organic matter. Causes the nitrogen supply capacity of the soil to increase in the later stage, and affects the maturity and yellowing of tobacco leaves

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