腐殖酸磷肥中的腐殖酸对磷迁移的影响及机理

景建元,袁亮,张水勤,李燕婷,赵秉强

Effects and Mechanism of Humic Acid in Humic Acid Enhanced Phosphate Fertilizer on Fertilizer-Phosphorus Migration

JING JianYuan,YUAN Liang,ZHANG ShuiQin,LI YanTing,ZHAO BingQiang

图2 速效磷含量及速效磷总量占总施磷量的累积百分数随距施肥层垂直距离增加的变化 含相同小写字母代表各处理间（距施肥层相同垂直距离）无显著差异（P>0.05）

Fig. 2 Variation of available phosphorus content and cumulative percentage of total available phosphorus in total phosphorus application with increasing vertical distance from fertilizer layer Means with the same letter in the same vertical distance from the fertilizer layer are not significantly different (P>0.05)