西江中上游人工次生林凋落物水文效应

在西江中上游肇庆市德庆三叉顶市级自然保护区,对人工次生林不同坡向的凋落物水文效应进行了研究,结果如下:(1)凋落物持水率与浸泡时间存在对数曲线关系,而凋落物吸水速率与浸泡时间呈指数函数关系；不同森林类型凋落物持水率和吸水速率随时间的动态变化规律基本相似；(2)不同坡向林分凋落物最大持水率的大小顺序为:东南坡(172.3...

Hydrological Effect of Litters of Artificial Secondary in the Middle and Upper Reaches of the Xijiang River

In Deqiang Sanchading municipal nature reserve in the middle and upper reaches of the Xijiang river, the hydrological effects of litters of different aspect about artificial secondary was studied,the results are as follows:(1)There were logarithmic curve function relationships of litter water-holding rate and immersion time. But,the relationship of litter water absorption rate with immersion time was inverse function. The dynamic changes of different forest type of itter water-holding rate and water absorption rate with time were similar. (2)The order of maximum water holding capacity of different aspect stand litters were that:Southeast slope (172.34%)>Northeast slope(161.88%)> north slope >southwest slope(150.20%)>northwest slope(134.05%)>east slope (133.55%)>West Slope(129.67%)>south slope (122.34%).The size of the maximum water holding capacity of different aspect holt were that: southeast slope(20.25%)> Northeast slope(19.74%)>northwest slope(16.52%)> east slope (16.32%)> north slope (15.17%)>southwest slope(14.66%)>West Slope(14.42%)>south slope(14.20%).