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 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