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3 土壤无机磷组分与有效磷含量之间的通径分析

Table 3 Path analysis for soil available phosphorus content (Olsen P) as a function of soil inorganic phosphorus fractions

作用因子 Factor 直接作用 Direct effect 间接作用 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) 0.974 0.160 0.003 0.175 0.119 -0.065 0.974 Ca8-P (x2) 0.182 0.855 0.004 0.174 0.103 -0.063 0.897 Ca10-P (x3) 0.007 0.439 0.093 0.094 0.039 -0.048 0.444 Al-P (x4) 0.186 0.917 0.170 0.004 0.121 -0.063 0.938 Fe-P (x5) 0.150 0.773 0.125 0.002 0.151 -0.047 0.828 O-P (x6) -0.074 0.852 0.154 0.005 0.158 0.095 0.834