摘要
对澜沧江中游云县段流域7种不同林分的土壤物理性质和林地枯落物水文特性进行了研究。结果表明:不同林分的土壤物理性质及其水源涵养功能差异明显。不同林分土壤上层有机质含量明显高于下层;不同林分土壤容重变动范围为0.67～1.74g/cm3;不同林分土壤总孔隙度变动在34.50%～74.62%之间;不同林分中,马缨杜鹃林具有最大蓄水量(2984.80t/hm2)和最大涵养水源量(1860.00t/hm2);不同林分枯落物的最大持水量变动范围为9.06t/hm2～30.58t/hm2,相当于0.91～3.06mm水深;而枯落物最大持水率变动范围为89.50%～218.17%。
This article analyzes the soil physical properties and hydrological functions of forest litter of seven forest communities in the region of Yunxian County which is in the middle of Lancang River valley. The resuits show that.there are significant differences in the soil characteristics and the functions of water conservation of the seven forest communities. The organic matter contents of top soil in different forest stands are obviously higher than those of subsoil. The range of soil bulk density among the forest stands is between 0. 67 g/cma and 1.74 g/cma ,and the range for soil total porosity is 34.50 ~//0 ~74.62~. The stand which is dom- inated by Rhododendron delavayi has the maximum water storage （2984.80 t/hm^2 ） and the majority of water conservation （1860.00 t/hm^2）. The maximum water--holding capacity of litters among the 7 forest stands range from 9.06 t/hm^2 to 30.58 t/hm^2,which equals the water of 0.46 mm deep. And the range of maximal water holding rates of litters is 89.50%-218.17%.
出处
《绿色科技》
2013年第5期1-4,共4页
Journal of Green Science and Technology
基金
国家科技部科技基础性专项--澜沧江中下游与大香格里拉地区科学考察(编号:2008FY110300)资助
关键词
土壤特性
凋落物
水源涵养
澜沧江中游
soil properties
litter
water conservation
middle reaches of Lancang River
