文献类型：期刊文献

中文题名：毛乌素沙地生物结皮覆盖区土壤水分收支变化特征

英文题名：Changes of soil water budget in the area covered by biological soil crusts in Mu Us sandy land,China

作者：岳艳鹏[1,2] 成龙[1,2] 孙迎涛[1,2] 庞营军[1,2] 吴波[1,2] 石麟[3] 何金军[3] 贾晓红[1,2]

第一作者：岳艳鹏

机构：[1]中国林业科学研究院生态保护与修复研究所,北京100091;[2]荒漠生态系统与全球变化国家林业和草原局重点实验室,北京100091;[3]鄂尔多斯市林业和草原研究所,内蒙古鄂尔多斯017000

年份：2022

卷号：33

期号：7

起止页码：1861-1870

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；PubMed;

基金：科技兴蒙行动重点专项(KJXM-EEDS-2020006);国家重点研发计划项目(2016YFC0500801,2016YFC0500806);科技基础资源调查专项(2017FY100206);中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2016ZD010);国家自然科学基金项目(41701010)资助。

语种：中文

中文关键词：毛乌素沙地;生物土壤结皮;入渗;蒸发;土壤水分收支;

外文关键词：Mu Us sandy land;biological soil crusts;infiltration;evaporation;soil water budget;

分类号：S152.7

摘要：探究半干旱生态系统生物土壤结皮对土壤水文过程的影响,并量化生物结皮覆盖下土壤水分收支状况,可为荒漠地区植被恢复与重建提供理论依据。本研究基于2018—2020年生长季(5—10月)对毛乌素沙地不同类型生物结皮(如藻类和苔藓)覆盖区土壤水分的连续观测,以裸沙为对照,分析了生物结皮对0~40 cm土壤水分收支的影响。结果表明:与裸沙相比,藻类结皮和苔藓结皮显著降低了降雨对40 cm以下土壤水分的补充,增加了土壤水分的蒸发损失。在相对湿润年份(2018年),裸沙和不同类型生物结皮覆盖土壤的水分支出量(渗漏量+蒸发量)均低于降雨量,土壤水分状况为收入;在相对干旱年份(2019和2020年),藻类结皮和苔藓结皮覆盖土壤的水分支出量高于降雨量,土壤水分产生亏缺,但是裸沙相反。可见,生物结皮导致其下覆0~40 cm土壤水分收支不平衡,在相对干旱年份出现了水分亏缺,这可能驱动该区域植被群落向浅根系植物演替。
Exploring and quantifying the impacts of biological soil crusts on soil hydrological processes and soil water budget in semi-arid ecosystems can provide a theoretical basis for vegetation restoration and reconstruction in deserts.Based on continuous observation of soil water content in different types of areas covered by biological soil crusts(e.g.,algae,moss)and bare sand in the Mu Us sandy land during the growing season(May to October)from 2018 to 2020,we examined the effects of biological soil crusts on soil water budget at a depth of 0-40 cm.Results showed that algae and moss crusts significantly reduced soil water supplement below 40 cm by rainfall and increased soil water evaporation loss,compared with that under bare sand.In the relatively wet year(2018),the amount of soil water expenditure(seepage+evaporation)covered by bare sand and the various types of biological soil crusts was less than that of rainfall,resulting in net soil water income.In the relative dry years(2019 and 2020),the amount of soil water expenditure covered by dominant algae and moss crusts was higher than that of rainfall,causing net soil water deficit,but opposite for bare sand.Biological soil crusts led to the imbalance of soil water budget of 0-40 cm depth and even soil water deficit in relatively dry years,which may lead to the succession of plant communities to be dominated by shallow-rooted plants in this area.