毛白杨落叶分解的研究

The study on the Decomposing Process of white Poplar Fallen Leaves

本文对毛白杨落叶在土壤中的分解进行了为期一年的研究。结果表明:土壤微生物的活动导致落叶中氮、水溶性糖、钾和钙含量的变化,而落叶中磷、钠和镁的含量变化不显著;落叶分解可提高土壤中氮的含量,土壤中有效钾在分解前期也有明显提高。设计的室内保温保湿试验表明温度和湿度明显地影响分解程度,但对分解变化的趋势和微生物的演替影响较小。

This paper studied decomposition of white poplar fallen leaves in one year The results showed that the changes in contents of nitrogen, soluble carbohydrates, potassium, and calcium in decomposing leaves are related to activity of microorgnisms closely, while phosphorus, magnesium, and sodium contents changed slightly; decomposition of fallen leaves results in the increase of nitrogen in soil surrounding, and effective potassium in soil increased rapidly in earlier stage of decomposition; temperature and humidity affected degrees of decomposition evadenlly, but have small influences upon the tendency of decomposition and succession of. microorganisms.