摘要
采用枯落物林地调查和浸泡实验法，研究黄山地区不同林龄无患子人工林枯落物层的水文效应，建立枯落物持水量与浸水时间、吸水速率和浸水时间之间的回归关系。结果表明：同一人工林内3个龄级无患子林分枯落物持水特性差异显著，龄级与持水特性间呈多项式回归，第Ⅰ龄级林分枯落物的持水性能最佳，其自然持水量、自然持水率、最大持水量、最大持水率、最大净持水量均最大；不同龄级林分枯落物的吸水量与浸水时间呈现对数函数关系，相关系数 R2为0．9124～0．9194，吸水速率与浸水时间表现为幂函数关系，相关系数 R2为0．9860～0．9875；随着浸水时间的增加其吸水速率越来越低，浸水1 h 时吸水速率最大，达195．25 g／h，浸水2 h 后吸水速率降为109．81 g／h，浸水20 h 后吸水速率降为零。
By using the methods of field investigation and soaking extraction,the water-holding properties of lit-ter layer of Sapindus mukorossi plantation with different age class were investigated,and the regression relationship be-tween the water-holding properties and soaking time,water uptake rate and soaking time was build.The results showed that：the water-holding properties of litter layer of Sapindus mukorossi plantation with different age class existed signif-icant differences.There was a polynomial regression relationship between the water-holding properties and the age class.The class I of Sapindus mukorossi plantation had the best water-holding properties.The natural water holding ca-pacity,natural water holding rate,the maximum of water-holding content,the maximum of water-holding rate,the big-gest net capacity were all the highest.The water-holding capacity in Sapindus mukorossi plantation with different age class increased in the form of logarithmic functional model with the increase of soaking time,with the correlation coef-ficient from 0.912 4 to 0.919 4.The water-absorption rates of the litters decreased in the form of power function,with the correlation coefficient between 0.986 0 and 0.987 5.The water-absorption rates became lower with the increase of soaking time.The water-absorption rate was 195.25 g/h while soaking in the water for 1 h.It reduced to 109.81 g/h while soaking in the water for 2 h.After 20 h,the water-absorption rates became zero.
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2015年第4期46-52,共7页
Journal of Southwest Forestry University：Natural Sciences
基金
安徽高校省厅自然科学研究重点项目(KJ2013A241)资助
国家级大学生创新训练项目(201310375006)资助
黄山学院自然科学研究项目(2014xkj002)资助
关键词
无患子
人工林
枯落物
持水性
Sapindus mukorossi
plantation
litter layer
water-holding properties
