北京林业大学学报2017，Vol.39Issue(3)：48-56,9.DOI:10.13332/j.1000--1522.20160383
生物土壤结皮对毛乌素沙地油蒿群落土壤水分的影响
Influence of biological soil crusts on soil moisture in Artemisia ordosica community in Mu Us Desert, northwestern China
摘要
Abstract
Biological soil crusts ( BSCs ) are widely distributed in Artemisia ordosica community in Mu Us Desert, northwestern China. They have been proved to play vital hydrological and ecological roles in desert ecosystems. However, the influence of BSCs on soil hydrological processes remains uncertain and controversial. In this study, we conducted a field experiment with two treatments ( undisturbed and removed) for two biological soil crusts ( lichen crusts and moss crusts) in A. ordosica community in the Mu Us Desert. We compared soil infiltration, evaporation and soil water volume in crust-covered and crust-removed soil. The initial infiltration rate, stable infiltration rate and cumulative infiltration significantly increased under crust-removed treatment ( P<0. 05 ) , suggesting that lichen and moss crusts had inhibitory effects on soil water infiltration. The effect of BSCs on soil evaporation was related to the type of BSCs and the evaporation stage. The lichen crusts had no effect on daily soil evaporation and total soil evaporation(P>0. 05). The influence of moss crusts on total soil evaporation was similar to that of lichen crusts. The moss crusts inhibited daily soil evaporation in early soil evaporation stage ( 1--5th day), and promoted it in the late stage (6--15th day). Generally, the soil moisture above 40 cm depth under crust-covered soil was higher than that in crust-removed soil, but opposite in moss soil. The soil moisture at each layer above 40 cm depth in crust-covered soil was higher than that in crust-removed soil. Compared with the crust-removed soil, soil moisture in crust soil was higher at 5 and 10 cm, but lower at 20 and 40 cm. The results indicated that lichen crusts should be reserved with no disturbance. Whether the moss crusts should be reserved or disturbed need further discussion. Our results highlight the different hydrological roles of lichen and moss crusts and provide important implications for the management of soil water resource in semiarid areas of northwestern China.关键词
油蒿群落/地衣结皮/苔藓结皮/水分入渗/土壤蒸发/土壤含水量Key words
Artemisia ordosica community/lichen crust/moss crust/water infiltration/soil evaporation/soil moisture分类
农业科技引用本文复制引用
王莉,秦树高,张宇清,吴斌,冯薇,刘军,白宇轩,佘维维..生物土壤结皮对毛乌素沙地油蒿群落土壤水分的影响[J].北京林业大学学报,2017,39(3):48-56,9.基金项目
"973"国家重点基础研究发展计划课题(2013CB429901)、国家重点研发计划课题(2016YFC0500905)、中央高校基本科研业务费专项资金资助(2015ZCQ-SB-02). （2013CB429901）
