Analysis on tobacco-planting soil fertility changes at different altitudes in Yanbian county

doi:10.14088/j.cnki.issn0439-8114.2022.12.007

Abstract

Abstract: Principal component analysis and equidistant cluster analysis were used to evaluate the status of soil nutrients and fertility in Yanbian county, Panzhihua city. The results showed that soil pH and alkali-hydrolyzable nitrogen were moderate, organic matter and water-soluble chlorine were low, and available phosphorus, available potassium, exchangeable calcium and exchangeable magnesium were abundant in soil from 2009 to 2010. From 2015 to 2017, pH increased slightly, organic matter and water-soluble chlorine decreased slightly, and available phosphorus, available potassium, exchangeable calcium and exchangeable magnesium increased significantly; the variation range of soil fertility comprehensive score （IFI） in 2015—2017 was 0.24~0.84, and the coefficient of variation was lower than that in 2009—2010. The average VALUE of IFI was 0.60, which was higher than that in 2009—2010; IFI increased at middle and low altitudes, but decreased at high altitudes; the comprehensive fertility index values of soil at different elevations were in the order of middle altitude > high altitude > low altitude. The results of the two censuses showed that the contribution of each index of soil nutrients to the comprehensive evaluation value of fertility was significantly different, indicating that the continuous application of chemical fertilizer aggravated the soil nutrient imbalance.

Key words: altitude, soil fertility, spatial-temporal evolution, comprehensive evaluation, Yanbian county

CLC Number:

S66
S436.639

XIONG Wei-liang, PAN Xing-bing, FENG Wen-long, LIU Yu, YUAN Jia-fu, XU Xiang-yu. Analysis on tobacco-planting soil fertility changes at different altitudes in Yanbian county[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(12): 31-37.

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