缙云山两种典型林分枯落物保水功能

Water Conservation Function of Two Types of Typical Forest Litter in Jinyun Mountain

摘要:

摘要：通过对重庆缙云山两种典型林分（灌木林和常绿阔叶林）枯落物储量调查分析和枯落物持水特性的研究，得到不同林分类型下枯落物储量、最大持水量、最大吸水速率等水文特征参数。结果表明:灌木林枯落物储量大于常绿阔叶林（32.42 t·hm-2＞25.48 t·hm-2），灌木林最大持水量大于常绿阔叶林（2.30 mm＞1.36 mm，5.76 mm＞2.96 mm），灌木林平均吸水速率大于常绿阔叶林（1.60 mm·h-1＞0.86 mm·h-1，4.02 mm·h-1＞1.61 mm·h-1），灌木林日均蒸发量小于常绿阔叶林（0.22 t·hm-2＜0.47 t·hm-2）。灌木林和常绿阔叶林枯落物的保水性能均比较好，但灌木林要高于常绿阔叶林。

Abstract:

Abstracts:Through surveying and analyzing the litter reserves and studying on the litter water retention characteristics of 2 typical forests (shrub forest and evergreen broadleaf forest) in Jinyun Mountain in Chongqing, the hydrological characteristic parameters, including the litter reserves, the maximum water-holding capacity and water-absorption speed, have been gained. The results showed that the litter amount of shrub forest was higher, and that of evergreen broadleaf forest took second place(32.42 t·hm-2＞25.48 t·hm-2); The maximum water retention capacity of shrub forest was higher, and that of evergreen broadleaf forest took second place (2.30 mm＞1.36 mm，5.76 mm＞2.96 mm); The average water-absorption speed of shrub forest was higher, and that of evergreen broadleaf forest took second place (1.60 mm·h-1＞0.86 mm·h-1,4.02 mm·h-1＞1.61 mm·h-1); The diurnal evaporation of shrub forest was higher, and that of evergreen broadleaf forest took second place (0.22 t·hm-2＜0.47 t·hm-2). In a word, the water conservation function of both shrub forest and evergreen broadleaf forest was good, but that of shrub forest was higher than that of evergreen broadleaf forest.