Sampling calculating method of tobacco-planting soil acidification degree and acidized soil improvement method

Abstract

The invention relates to a sampling calculating method of tobacco-planting soil acidification degree. The method includes steps of (1), confirming a testing point; (2), excavating a sampling pit; (3), confirming a sampling level; (4), sampling every sampling layer; (5), testing pH value of the soil sample; (6), determining every level of sample above the middle part of the pit as the sample of a plough layer; taking the sampling layer in the middle part of the pit as the sample of the transition layer, and taking samples as the reference data; taking the sample of every sampling layer beneath the middle part of the pit as a bottom layer sample; (7), calculation of acidification layer. Through classifying the sample of every soil layer, the influence ranges of ecological condition, farming, fertilizing and other change factors on pH value are confirmed, the influence range of soil mother rock, vegetation type and other fixing factors on the pH value are determined, thereby providing exact basis for the calculation of the acidification layer. Compared with the regular method such as sampling calculating method or testing method in calendar years, the application method is more exact, and more capable of preventing and controlling soil acidification.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of tobacco planting soil acidification prevention and control, and in particular relates to a method for sampling and calculating tobacco planting soil acidification, in particular to a method for sampling and calculating the degree of acidification of tobacco planting soil and a method for improving acidified soil. [0003] Background technique: [0004] Soil is the carrier of tobacco growth. Soil pH is an important characteristic of soil physical and chemical properties. Generally, the production of high-quality tobacco leaves requires a soil pH of 5.5 to 6.5. Slightly acidic soil is conducive to the growth and development of tobacco and the formation of good quality. However, soil overacidity not only has a negative impact on soil quality, but also affects the growth and quality of tobacco; previous studies have found that the area of ​​cultivated soil acidification in Hunan Province has now accoun...

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Problems solved by technology

However, soil overacidity not only has a negative impact on soil quality, but also affects the growth and quality of tobacco; previous studies have found that the area of ​​cultivated soil acidification in Hunan Province has now accounted for 72.6% of the province's area, and there are further developments. The trend of acidification (Hunan Agricultural Sciences, 2013(1): 56-59, 60.); at present, tobacco farmers in tobacco-growing areas only pay attention to the application of chemical fertilizers, ignoring the application of organic fertilizers and soil conservation, although the production of flue-cured tobacco is guaranteed , but there are also the following problems:

[0005] 1. There is a serious trend of soil acidification in tobacco planting, and root diseases are becoming more and more serious

[0006] 2. In the case of severe acidification, the quality of flue-cured tobacco cannot be guaranteed

[0007] 3. Severe acidification leads to low fertilizer utilization rate

[0008] 4. Soil acidification affects the normal growth and development of crop roots

[0010] 6. At present, the basis for acidification prevention and control is mainly the measured soil pH value, which only represents the acidity of the soil, but not the degree of acidification of the soil. Although the annual pH value difference measured by the multi-year positioning test reflects some acidification characteristics, each year Ecological conditions, fertilization conditions, and farming conditions are different, and the accuracy of measurement and calculation is poor, resulting in unsatisfactory control effects

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