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塔克拉玛干沙漠南缘不同植被区土壤水分状况研究
Authors
刘波
刘镇
+4 more
孙旭伟
安桂香
张晓蕾
曾凡江
Publication date
1 February 2011
Publisher
Abstract
采用野外定位观测法,对柽柳、胡杨、骆驼刺和沙拐枣林地土壤水分状况进行监测,并通过实测数据对农田区和荒漠区0—100cm土层土壤水分特征曲线进行拟合。结果表明,各林地0—250cm土层土壤含水量均随深度增加逐渐增大,生长季内9月和10月份土壤表层含水量明显大于其它月份。一次强降雨对土壤表层含水量有所补给,对深层土壤影响较小。总体而言,土壤蓄水量(0—250cm)在月季间差异不大,均维持在120—140mm之间,但各林地有所差异,表现为:胡杨>柽柳>骆驼刺/沙拐枣。对整个生长季而言,4种植物蒸散强度呈现出:胡杨>沙拐枣>柽柳>骆驼刺,且6月份蒸散强度最大。农田区和荒漠区0—100cm土壤含水量与土壤基质势间幂函数拟合效果好。研究成果可为该区今后植被保育及生态用水提供理论参考
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016