摘要
以161个公里网格样地为基础,对尖峰岭热带雨林原始林和不同采伐方式(径级择伐和皆伐)下天然更新的次生林凋落物储量、持水量、持水率和吸水速率进行了研究。结果表明,原始林、径级择伐林和皆伐林的凋落物储量分别为6.42,6.29和6.66t/hm2;最大持水量分别为9.55,10.49和11.17t/hm2。3类型森林凋落物最大持水率大小依次为皆伐林(169.2%)>径级择伐林(168.0%)>原始林(155.6%),经Kruskal—Wallis H检验表明,原始林、径级择伐林和皆伐林凋落物最大持水率间差异显著。凋落物持水量和凋落物持水率随着浸泡时间的增加符合W=alnt+b模型而变化,凋落物吸水速率随着浸泡时间的增加依W=at-b模型下降。
Based on field survey on the 161 grids with areas of 625 m2 in Jianfengling of Hainan Province,the water storage,water-holding capacity,water-holding rate and water absorption rate of forest litter were studied in different tropical rainforests（including primary forest,selectively logged forest and clear-cut forest）.The results show that in primary forest,selectively logged forest and clear-cut forest,the litter storage was 6.42,6.29 and 6.66 t/hm2,and the max water-holding capacity was 9.55,10.49 and 11.17 t/hm2,respectively.Clear-cut forest has the highest max water-holding rate of 169.2%,followed by selectively logged forest（168.0%）,and primary forest（155.6%）.The max water-holding rates in the three forests differed significantly as indicated by the Kruskal—Wallis H test.The water-holding capacity and water-holding rate of litter in all the forests increased logarithmically with soaking time（W=alnt＋b）.While,the water absorption rates of litter reduced followed equation W=at-b as soaking time increased.
出处
《水土保持通报》
CSCD
北大核心
2011年第2期57-60,67,共5页
Bulletin of Soil and Water Conservation
基金
林业公益性行业科研专项"中国森林对气候变化的响应与林业适应对策研究"(200804001)
中国林科院热带林业研究所基本科研业务费专项(2007-1
RITFYWZX200902)
关键词
热带雨林
凋落物
采伐方式
储量
持水量
持水率
吸水速率
tropical rainforest
litter
deforestation method
storage
water-holding capacity
water holding rate
water absorption rate
