烟草科技2017，Vol.50Issue(9)：15-22,8.
文山植烟土壤交换性钙镁分布特征及影响因素分析
Distributions of exchangeable calcium and magnesium in Wenshan tobacco-growing soil and their influencing factors
摘要
Abstract
To investigate the spatial distributions and influencing factors of exchangeable Ca and Mg contents and Ca/Mg ratio in soils from Wenshan tobacco-growing areas, 276 representative soil samples were collected from Wenshan with Global Positioning System(GPS)technique. The contents of exchangeable Ca and Mg in soil samples were determined, and their spatial distributions and influencing factors were studied with geostatistics and classical statistical methods. The results showed that: 1)The contents of exchangeable Ca and Mg were rich in Wenshan soils, with an average value of 2 389.15 and 213.95 mg·kg-1, respectively. However, Ca/Mg ratio was imbalanced. Physiological calcium deficiency(Ca/Mg<5)and physiological magnesium deficiency(Ca/Mg>10)could occur in tobacco from 17.10% and 54.64% of Wenshan tobacco-growing areas, respectively. The spatial analysis suggested that exchangeable Ca and Mg contents and Ca/Mg ratio presented clear distribution characteristics. 2)The canonical correlation analysis indicated that exchangeable Ca and Mg contents and Ca/Mg ratio in Wenshan tobacco-growing soils were significantly affected by altitude, soil pH and total phosphorus in soil. The stepwise regression analysis showed that the influence of soil pH was the most significant factor. 3)The exchangeable Ca and Mg contents and Ca/Mg ratio increased with the increase of soil pH and total phosphorus content, while the exchangeable Ca content decreased with the rise of altitude.关键词
文山烟区/土壤/交换性钙/交换性镁/钙镁比/分布Key words
Wenshan tobacco-growing area/Soil/Exchangeable calcium/Exchangeable magnesium/Ca/Mg ratio/Distribution分类
农业科技引用本文复制引用
谭军,周冀衡,古琦,周千雅,粟深河,刘晓颖,李强..文山植烟土壤交换性钙镁分布特征及影响因素分析[J].烟草科技,2017,50(9):15-22,8.基金项目
云南省烟草公司科技项目"文山烟叶特色风格定位研究及品牌导向型基地建设开发"(2011YN73). （2011YN73）
