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黄土丘陵沟壑区不同土地类型的土壤水分特性 预览 被引量:13

Soil moisture characteristics under different land types in hilly and gully areas on Loess Plateau
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摘要 在黄土丘陵沟壑区燕沟流域,于2002-2006年定位监测不同类型土地不同坡位、坡向的土壤含水量,对土壤含水量的动态变化进行了系统分析。结果表明:不同土地类型的土壤含水量差异明显,坝地最高,平均19.83%,川台地次之,平均17.21%,梯田平均16.34%,坡地最低,平均15.04%,土壤含水量与年降雨量呈正相关,相关系数为0.68;土壤含水量月变化动态呈现"单谷"曲线,7月份最低;不同坡位的土壤含水量变化趋势为随坡位升高,土壤水分含量递减;不同坡向的土壤含水量变化趋势为阴坡>阳坡。 By monitoring the soil moisture content of different land types,aspect of slope and slope location located in Yangou watershed in loess hilly and gully region from 2002 to 2006,a systematic analysis was made of dynamic variation under soil moisture.The results indicated that the soil moisture of different land types was obviously different;in dam,soil moisture content remained highest with an average of 19.83 percent;in mesa,soil moisture content remained the second highest with an average of 17.21 percent;in terrace,soil moisture content was an average of 16.34 percent;and in slope,soil moisture content was the lowest with an average of 15.04 percent;soil moisture content was positively correlated with rainfall,and its correlation coefficient was 0.68.The curve of monthly dynamic changes of soil moisture content showed as single-valley type and was the lowest in July.With the increase in slope,soil moisture content reduced.Different aspect of slope of soil moisture content changes was in trends of lunar slopesolar slope.The results have positive significance on rational utilization of land.
作者 王栓全 岳宏昌 王伟 WANG Shuan-quan,YUE Hong-chang,WANG Wei(Agriculture College of Northwest A & F University,Yangling,Shangxi 712100,China)
出处 《干旱地区农业研究》 CSCD 北大核心 2009年第6期 93-96,共4页 Agricultural Research in the Arid Areas
基金 国家科技支撑项目(2006BAD09807) 中国科学院西部项目(kzex2-xb2-05) 陕西省科技攻关项目(2007K01-21)
关键词 土地类型 土壤水分 黄土丘陵沟壑区 different land types soil moisture loess hilly and gully region
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