东北黑土区丘陵漫岗夏季坡面土壤水分差异分析  

Soil Moisture Content on Slope in Summer Season in Black Soil Region of Northeastern China

作　　者：杨新[1] 刘宝元[1] 刘洪鹄[1] 

机构地区：[1]北京师范大学地理学与遥感科学学院教育部环境演变与自然灾害教育部重点实验室

出　　处：《水土保持通报》2006年第2期37-39,44,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金重点项目"东北黑土区土壤侵蚀机理与土地退化预警(40235056)"

摘　　要：在7月雨季过后,用TDR在典型黑土区小流域做土壤水分调查。结果显示：小流域坡面从下部到上部,表层10 cm土壤水分含量变化幅度最大。在深度上,表层10 cm水分含量最低,0～30cm内由上到下水分迅速增加,从30 cm以下到100 cm趋于稳定。坡面3个部分中,在表层10 cm水分含量下部最高,中部次之,上部最低；20cm土层水分含量上中下3部分相差无几,而在30 cm以下到100cm,土壤水分含量由高到低基本上是上部、下部和中部。坡面上的林带在相同条件下土壤含水量显著低于豆地,但因为宽度只有10 m左右,从变化趋势来看其影响深度仅在1 m以内。沟底林带地势低,表层水分较高,因宽度大而影响深度要超过1 m。麦地和豆地相比,土壤水分含量较低。In a typical black soil region, soil moisture content was investigated using the Time Domain Reflectometry in July, 2004. The conclusion is that in the small drainage, soil moisture content within 10 cm of soil surface is the most variable and the least, and then increases rapidly below the surface layer. In a layer from 30 to 100 cm soil moisture content tends to be steady. At the depth of 10 cm, the soil moisture content tort by ascending is downside part, middle part and upside part; to the 20 cm depth, the rail moisture content is consistent, but the ascending tort is upside part, downside part and middle part between 30 cm and 100 cm. Soil moisture of the woodland on slope is far lower than the soybean land, and the impact of slope woodland seems to terminate at a depth of 1m; the woodland in gully is wider than that on slope, so the impact reaches to the depth more than 1 m. Soil moisture of barley field is much lower than that of soybean field.

关 键 词：黑土区 土壤水分 差异 坡面 夏季 

分 类 号：S152.7[农业科学—土壤学]