摘要
对31个土壤8个吸磷因子的主组元分析表明,土壤腐殖质,粘粒,活性铁,pH,土壤粘粒中的 Fe_2O_3和 Al_2O_3是影响土壤的主要吸磷因子.根据第1和第2主组元方程可把土壤吸磷强度分为强、较强、中等、较弱4个等级.4个等级土壤最大吸磷量 x_m 分别为:>850,600—850,350—600,<350μgP/g 土.
The results of principal component analysis on the indexes of phosphatic adbsorbtion in soils showed humus,clay,active ferric oxide,pH and sesquioxide in clay were main factors affected phosphate absorption of soils.The intensity of soil phosphate absorption could be divided into four grades,which were very strong,strong,middle and low, according to the equations of tirst and second principle components.Their x_m,the maxi- mum phosphate absorption,were>850,600-850,350-600 and<350 μg P/g soil, respectively.
关键词
土壤
吸磷因子
主组元分析
soil
the factors of phosphatic absortion
principal component analysis
