长期定位施肥对棕壤有机磷形态及转化的影响

Effect of the Long-term Located Fertilization on the Organic Phosphorus Form and Transformation in Bureazom

对长期定位试验的棕壤有机磷分级表明:长期施入有机肥或化学磷肥,使土壤活性有机磷、中等活性有机磷和高等稳定性有机磷的含量均增加,部分处理中等稳定性有机磷含量下降,但变化不大。活性有机磷、中等稳定性有机磷和高等稳定性有机磷的比例均呈下降趋势,而中等活性有机磷的比例呈上升趋势。棕壤有机磷以中等活性有机磷和中等稳定性有机磷为主体,约占有机磷总量的90%左右。中等活性有机磷与速效磷在0.01水平极显著相关,活性有机磷、中等稳定性有机磷和高等稳定性有机磷与速效磷在0.05水平显著相关。各组分有机磷对速效磷贡献的大小顺序为:中等稳定性有机磷>中等活性有机磷>高等稳定性有机磷>活性有机磷。

The experiment in the form of organic phorsphorus in Bureazom showed that in long-term application of chemical phosphorus or organic phosphorus, the contents of LOP, MLOP and MROP were increased and the content of MROP was decreased in some treatments. The proportion of LOP, MROP and HROP were decreased,but the proportion of MLOP was increasing. MLOP and MROP were the principal parts of organic phorsphorus in the Bureazom, which consisted of 90 percents of total organic phorsphorus. MIDP was significantly correlated with Olsen-P at P 〈 0.01 level. LOP, MROP and HROP were correlated with Olsen-P at P 〈0.05 level.The order of contribution to the Olsen-P：MROP 〉 MLDP 〉 HROP〉 LOP.