摘要
研究了棕壤中磷肥和有机肥带入的磷向土壤各形态无机磷的转化情况及其有效性。结果表明：在棕壤 中存在着钙磷体系的有效性转化，Ｃａ１０－Ｐ在棕壤中难以积累；施肥增加的土壤无机磷的增虽以形成Ｆｅ－Ｐ和 Ａｌ－Ｐ为主，约占６０％～７８％；而形成Ｃａｓ－Ｐ和Ｃａ２－Ｐ的比率则是有机肥的转化率明显高于磷肥；在棕壤中， Ｆｅ－Ｐ是作物吸收的重要磷源Ｃａ８－Ｐ的作用介于Ｆｅ－Ｐ和Ａｌ－Ｐ之间，Ｃａ２－Ｐ虽也是棕壤中速效磷源，但对作 物吸磷贡献不大。
The form transformation of inorganic-P added by fertilization and its availability were studied in this paper. It showed that it was difficult for Ca10-P to accumulate in Brown Soil owing to the shift of Ca10- P availability. The increment in soil inorganic-P mainly shifted to Fe-P and Al- P which totally shared 60-78 percent. However, the increment ratio of Ca8 - P and Ca2 - P were evidently different between phosphate fertilizer and oiganie fertilizer and the organic fertilizer showed a larger proportion. Fe-P was a important form of inorganic-P to crops, and the role of Ca8-P was among Fe-P and Al-P. however Ca2-P contributed little to crop uptake.
出处
《辽宁农业科学》
2001年第2期5-7,共3页
Liaoning Agricultural Sciences
关键词
棕壤
长期定位施肥
无机磷形态
转化率
有效性
Brown Soil
long-term fertilization experiment
soil inorganic phosphorus forms
transformation ratio
availability
