皇甫川地区枯枝落叶的分解及其对土壤生物环境的影响

在内蒙古荒漠化草原皇甫川地区,采用网袋法比较研究了具有优势分布的禾草、松树叶和杨树叶的枯枝落叶的分解速率,建立了有机碳残留量与时间的动态模型。不同枯枝落叶在其分解中营养元素的转化并不相同,禾草和油松叶的氮、磷均较快释放,而分解快速的杨树叶中出现氮和磷的固定;枯枝落叶的快速分解会引起土壤的氮和磷元素的周期性短缺。枯枝落叶分解对相应土层的生物学活性产生刺激作用,可促进土壤生物环境的改善。

Decomposition of Litters and Its Effects on Soil Biological Environment in Huangfucuan Basin

Decomposition of litter the herbage grass and the leaf of pinus and Populus by net bag method in Huangfucuan basin of the desert steppe of Inner Mongolia. We have esTablelished the dynamic model of organic carbon remains in litter. It was different that nutrition elements exchange in different litters. Nitrogen and phosphorus in Herbage grass and the leaf of pinus were found to be all quickly released with no fixed, but leaf of Populus had the fix for both nitrogen and phosphorus. The decomposition of litter can cause the periodic shortage of nitrogen and phosphorus chemical elements. The decomposition of litter had a promoted function on soil biological activities.