Correlation Analysis of Available P Content in Tobacco Grown Soils with Tabacco Leaf Chemical Components

The study has analyzed the spatial distribution of tobacco grown soils and its correlation with tobacco leaf chemical components in Luoping County.The results are as follows.(1) The available P content in the tobacco soil is generally on the high side,with an average of40.60 mg/kg,a variation coefficient of 80.26% and the large degree of variation in Luoping.(2) The different tobacco soil types in Luoping are of significant differences in available P content from high to low,i.e.,alluvial soil paddy soil yellow soil purple soil red soil.(3) The different townships of Luoping are of different available P content in the tobacco soil in the order from high to low,i.e.,Agang Fule Jiuwuji Majie Laochang Jiulong Luoxiong Dashuijing Zhongshan Banqiao.(4) The different altitudes in Luoping are also of significant differences in vailable P content in the tobacco soil from high to low,i.e.,that of 1 600~1 800 m at altitude that of 1 400~1 600 m that of-∞~1 400 m that of 1 800 m ~ +∞;and the variation coefficient of soil group's available P content is up to the maximum at the altitude of over 1800 m.And(5)the soil available P content has no significant relationship with flue-cured tobacco's major elements and secondary elements except its P,and it can promote flue-cured tobacco's absorption of B,Fe and Mo and restrain the uptake of Cu and Zn.