新疆南部耕龄10~14 a棕漠土在不同团聚体中有机磷的组分

采用干筛法进行土壤团聚体分级,Bowman Cole法进行土壤有机磷分级，改进法测定不同团聚体中有机磷的组分,研究新疆南部（南疆）3县耕龄10~14 a棕漠土在不同团聚体有机磷组分分布规律。结果表明：耕龄10~14 a棕漠土在不同团聚体有机磷组分随土壤颗粒的增大而减少，且有机磷排列顺序为：高稳性有机磷＞活性有机磷＞中活性有机磷＞中稳性有机磷；但有机磷的变化因土地利用方式的不同而各异。表明新疆南部3县耕龄10~14 a的棕漠土在不同团聚体有机磷组分以高稳性有机磷为主,占有机磷总量的一半以上,且有机磷组分在不同团聚体中的差异均达到显著水平。

Organic Phosphorus Components in Different Aggregates of Brown Desert Soil Cultivated for 10-14 Years

In this paper, the distribution regularities of different organic phosphorus components of aggregates in brown desert soil cultivated for 10-14 years in three counties in south Xinjiang were researched. The drysievetest was used to grade the soil aggregates, Bowman Cole method was used to grade the organic phosphorus rating, and improvement method was used to measure the organic phosphorus components in different aggregates. The results revealed that the organic phosphorus components decreased with the increase of particle size of brown desert soil cultivated for 10-14 years in three counties in south Xinjiang. The organic phosphorous was in an order of high stable organic phosphorus>activity organic phosphorus>moderately active organic phosphorus>moderately stable organic phosphorus. However, the variation of organic phosphorus was different from different land use patterns. Highly stable organic phosphorus was dominant in the total organic phosphorus in brown desert soil cultivated for 10-14 years in the three counties in south Xinjiang, and its proportion accounted for over 50%. The difference of organic phosphorus components among different aggregates was significant.