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4 土壤无机磷组分与有效磷含量之间的逐步回归分析

Table 4 Stepwise regression analysis between soil inorganic phosphorus fractions and available phosphorus content

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 显著水平 Significant level x1→y x2→y x5→y Ca2-P(x1) 0.684 0.166 0.123 0.974 0.000 Ca8-P(x2) 0.189 0.601 0.106 0.897 0.064 Fe-P(x5) 0.155 0.543 0.130 0.828 0.054