Analysis of soil pH distribution characteristics and influencing factors of tobacco planting in YongZhou
The pH distribution of soil in Yongzhou tobacco plant was studied, which provided a scientific theoretical basis for soil pH regulation in Yongzhou tobacco area. A total of 689 soil samples were collected in the tobacco producing area of Yongzhou, and the spatial variation of soil pH and its main driving factors were analyzed by multivariate statistics and stepwise regression methods. The results showed that the average pH of tobacco soil in Yongzhou was 6.95, and only 25.84％of the tobacco soil pH was within the"suitable"level, 3.34％of the tobacco soil pH was at the"extremely low"level(≤5.0), and 51.52％of the tobacco soil pH was in the"extremely high"(≥7.5) range, which had the problem of alkalinity. The results of influencing factors showed that the cumulative explanatory ability of pH by eight indexes of exchange calcium, exchange magnesium, organic matter, available potassium, total potassium, total nitrogen, available sulfur and cation exchange reached 82.2％, and exchange calcium had the greatest influence on the spatial variation of soil pH of tobacco planting in Yongzhou, which could independently explain 79.5％of the variation. There were significant or very significant differences in pH under each infrastructure supporting situation, each crop rotation system, and each soil parent material.
Yongzhoutobacco planting soilpHspatial distribution
万方数据
维普
