等有机质 土有效磷和无机磷形态的关系

李若楠,王政培,BATBAYARJavkhlan,张东杰,张树兰,杨学云

Relationship Between Soil Available Phosphorus and Inorganic Phosphorus Forms Under Equivalent Organic Matter Condition in a Tier Soil

RuoNan LI,ZhengPei WANG,Javkhlan BATBAYAR,DongJie ZHANG,ShuLan ZHANG,XueYun YANG

表5 土壤无机磷组分与磷活化系数（PAC）之间的通径分析

Table 5 Path analysis for phosphorus activation coefficient（PAC）as a function of soil inorganic phosphorus fractions

作用因子 Factor 直接作用 Direct effect 间接作用地Indirect effect 与y的相关系数 Correlation coefficient with y x1→y x2→y x3→y x4→y x5→y x6→y Ca2-P (x1) 0.768 0.062 -0.025 0.077 -0.014 -0.339 0.767 Ca8-P (x2) 0.071 0.674 -0.028 0.077 -0.012 -0.328 0.690 Ca10-P (x3) -0.055 0.346 0.036 0.042 -0.005 -0.250 0.302 Al-P (x4) 0.082 0.723 0.066 -0.028 -0.015 -0.330 0.732 Fe-P (x5) -0.018 0.609 0.049 -0.014 0.066 -0.245 0.602 O-P (x6) -0.388 0.672 0.060 -0.035 0.070 -0.011 0.579