景谷县森林枯落物水文作用研究

指出了森林枯落物是森林生态系统的重要组成部分，枯落物层是森林拦蓄降水的重要环节。为了调查景谷县森林枯落物水文作用，选取了具有代表性的6个大样区和18个标准样地进行调查取样，结果表明：（1）景谷县3种植被类型中枯落物蓄积量最大的是季雨林，最小的是暖性针叶林，常绿阔叶林和李雨林林下枯落物半分解层所占比例要比未分解层大，而暖性针叶林林下枯落物未分解层所占比例要比半分解层大；（2）景谷县3种植被类型中，常绿阔叶林枯落物自然含水率最高，季雨林最小，暖性针叶林介于二者中间；（3）自然状态下，阔叶林枯落物的最大持水率大于针叶林，但由于针叶林枯落物数量较多，不易分解糜烂，因此仍有很强的拦蓄能力，3种植被类型中，暖性针叶林的拦蓄能力是最强的。

Study of Hydrological Effect of Forest Litters in Jinggu County

The forest litters are an important part of forest ecosystems,and the litter layer is the key step of the forest storing precipitation. In order to investigate the Hydrological effect of Jinggu County Forest,this article selects the representative samples from six big-sample areas and 18 standard-sample fields. The re suits show that： （1） Among the three vegetation types of Jinggu County,the litter volume of monsoon forest is largest and that of warm coniferous forest is smallest ; the proportion of half decomposed layer under evergreen broad-leaved forest and monsoon forest are larger than that of decomposition layer,but the warm coniferous forest is on the contrary; （2） Among the three vegetation types,the litters of evergreen broadleaf forest have highest natural moisture content, the monsoon forest is smallest, and the warm coniferous forest is between the two; （3） In natural state,the maximum water holding rate of broadleaf forest litterfall is greater than that of coniferous forest, but due to the larger number of coniferous forest litterfall and not easily broken down erosion, therefore,there is still a strong impoundment capacity. Among three vegetation types, the impoundment canacitv of warm coniferous forest is strongest.