长期施用不同肥料对栗褐土无机磷组分的影响

Effects of Long-term Different Fertilization on Inorganic Phosphorus Forms in Cinnamon Soil

采用顾益初、蒋柏藩的无机磷分级方法,研究了长期施肥条件下栗褐土无机磷组分含量变化及其与土壤有效磷的关系。结果表明:长期施用磷肥和有机肥均能促进栗褐土中无机磷的积累,有机肥与磷肥配施效果更加明显。Ca-P是栗褐土无机磷的主体,占无机磷总量的80.0%,其次是O-P、Fe-P和Al-P。长期施肥处理的无机磷各组分含量与不施肥处理相比均有所增加,而单施氮肥处理无机磷各组分略有下降。无机磷中Ca2-P、Ca8-P、Ca10-P、Al-P、Fe-P与Olsen-P相关系数分别为0.976 7,0.886 5,0.915 5,0.860 2,0.848 4,均达极显著水平,O-P与Olsen-P的相关性不显著。通径分析表明Ca2-P、Al-P、Fe-P、Ca10-P为Olsen-P的主要磷源。

The effects of long-term fertilization on inorganic phosphorus fractions in lime concretion cinnamon soil were studied using the fraction classification developed by Gu Yi-chu and Jiang Bo-fan. The results show that Long-term application of chemical phosphorus and manure fertilizer may increase the inorganic phosphorus. The main of inorganic phosphorus in cinnamon soil is Ca-P which takes up 80.0% , in the next place are O-P, Fe-P and AI-P. Under the Long-term application of chemical phosphorus and manure fertilizer, the components pool of inorganic phosphorus have increased compared with non-fertilization, except of nitrogen fertilization. In inorganic phos phorus,the related coefficient between Ca2-P, Ca8-P, Ca10-P, Al-P, Fe-P and Olsen-P are 0. 976 7,0. 886 5, 0. 915 5,0. 860 2,0. 848 4, which reach significant positive relationship,except O-P. C a2-P, AI-P, Fe-P and Ca l0-P are the main sources of Olsen-P can be found by path analysis.