长期施用不同肥料对栗褐土有机磷组分的影响

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

摘要:

采用Bowman-Cole提出的土壤有机磷分级体系对长期定位试验耕层土壤有机磷的形态进行测定。结果表明，除单施氮肥处理(N)外，各处理磷的有效率与对照相比均有所增加，高量有机肥与氮磷肥配合施用处理(M2NP)增加最多，增加了5.59%；氮磷肥合施(NP)、单施低量有机肥(M1)、低量有机肥与氮肥配合施用(M1N)、低量有机肥与氮磷肥配合施用(M1NP)、高量有机肥与氮肥配合施用(M2N)和M2NP处理有机磷总量分别比对照增加了92.7%、133.8%、133.9%、191.3%、172.1% 和201.5%，差异达到显著水平；除N处理外，各处理有机磷组分中以活性有机磷增加地最为明显，较对照增加了205.1% ~ 420.5%，其中以M2NP增加最为显著增加了420.5%；中活性有机磷与中稳性有机磷是栗褐土有机磷的主体，约占有机磷总量的70%；相关分析与回归分析表明，活性有机磷、中稳性有机磷对速效磷的贡献最大。

Abstract:

This paper studied the forms of organic phosphorus in topsoil by Bowman-Cole’s method. The results showed that phosphorous efficiencies of all treatments were increased compared with the control except N treatment. Phosphorous efficiency of M2NP treatment was the highest, increased by 5.59% compared with the control. The differences of total organic phosphorous of NP, M1, M1N, M1NP, M2N and M2NP were significant and respectively increased by 92.7%, 133.8%, 133.9%, 191.3%, 172.1% and 201.5% respectively compared with the control. Labile organic phosphorus increased most in organic phosphorous of all treatments except N treatment, increased by 205.1% - 420.5% compared with the control. Labile organic phosphorus of M2NP was increased by 420.5% compared with the control. Active organic phosphorus and moderately resistant organic phosphorus were the main components of Cinnamon organic phosphorus, accounting for 70% of the total organic phosphorus. Labile organic phosphorus and moderately resistant organic phosphorus contributed most to the available phosphorus.