缙云山两种典型林分枯落物保水功能

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 · hm-2＞25.48 ·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 · hm-2＜0.47 · 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.

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

Through surveying and analyzing the litter reserves typical forests （shrub forest and evergreen broadleaf forest） in 3inyun Mountain in Chongqing, the hydrological charac teristic parameters, including the litter reserves, the maximum waterholding capacity and waterabsorption 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〉 hm2 〉25.48 t.hmZ）; The maximum water retention capacity of shrub forest was higher, and that of evergreen broadleaf forest took second place （2.30 ram〉 1.36 ram, 5.76 mm〉2.96 ram） ; The aver age waterabsorption speed of shrub forest Was higher, and that of evergreen broadleaf forest took second place （1.60 mm . h1〉0. 86 mm. h-1 ,4.02 nun . h-1〉1.61 mm. h-1）; The diurnal evaporation of shrub forest was higher, and that of evergreen broadleaf forest took second place 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 ev ergreen broadleaf forest.