祁连山南麓中国沙棘主要林分类型的森林水文作用

The Eco-hydrological Effect of Main Forest Stands of Hippophae rhamnoides ssp. sinensis Stands in Southern Qilian Mountains

中国沙棘+青海云杉和中国沙棘+华北落叶松混交林的最大截留量、枯落物持水量和稳渗速度明显高于其纯林.17年生华北落叶松+中国沙棘林最大截留量较华北落叶松纯林高23.9%,枯落物持水量高26.3%,稳渗速度高2.4倍.退耕地所有中国沙棘林分最大截留量分布范围为1.43～2.02mm,较农作物高0.80～1.41mm,也高于退耕地种草、种药的0.23～0.43mm;退耕还林地表形成稳定的枯落物层,退耕栽植沙棘林枯落物层持水量较农作物十分明显;中国沙棘林地土壤的稳渗速度较农耕地的高5.5～19.5倍.退耕还林还草后,中国沙棘等人工植物群落较农作物的森林水文生态功能明显得到提高.

The maximum rainfall interception amount, interception amount of litter layers and the final infiltration capability of Picea crassifolia stands and Larix principis rupprechtii stands mixed with Hippophae rhamnoides ssp sinensis are obviously higher than their pure stands The maximum rainfall interception amount, interception amount of litter layers and final infiltration velocity of the 17 year old Larix principis rupprechtii mixed with Hippophae rhamnoides ssp sinensis is 23 9% higher, 26 3% higher and 2 4 times higher than their pure stands, respectively Returning to woodland or grassland from cultivated land, the maximum rainfall interception amount of the Hippophae rhamnoides ssp sinensis stands is from 1 43 to 2 02 mm higher than local main farm crops (0 80~1 41mm), also higher than grass and Chinese medicinal herb types(0 23~0 43mm) The interception amount of litter layers in the Chinese seabuckthorn stands returned from cropland is obviously higher than it in the cropland, so is the final infiltration velocity 5 5~19 5 times higher Therefore, various stands mixed with Hippophae rhamnoides ssp sinensis play very important roles in forest eco hydrological effect