干旱地区农业研究
榦旱地區農業研究
간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2009年
4期
60-64
,共5页
泥炭%水分特征曲线%高速离心机%拟合
泥炭%水分特徵麯線%高速離心機%擬閤
니탄%수분특정곡선%고속리심궤%의합
peat%water characteristic curve%high speed centrifu ge%fitting
泥炭和粘土不同比例配合土按同一容重装填到环刀中,采用高速离心机法和大气平衡法测定配合土的不同吸力下土壤的含水量,并利用Van Ge nnuchten数学模型对水分特征曲线进行拟合,进而来分析泥炭与粘土配合土的持水能力.研究结果表明:①泥炭和粘土(＜1 mm)比例为3∶1时的持水能力较强,优于其它配比 .②泥炭和粘土(3～5 mm)比例为3∶1和4∶1时的持水性较好.
泥炭和粘土不同比例配閤土按同一容重裝填到環刀中,採用高速離心機法和大氣平衡法測定配閤土的不同吸力下土壤的含水量,併利用Van Ge nnuchten數學模型對水分特徵麯線進行擬閤,進而來分析泥炭與粘土配閤土的持水能力.研究結果錶明:①泥炭和粘土(＜1 mm)比例為3∶1時的持水能力較彊,優于其它配比 .②泥炭和粘土(3～5 mm)比例為3∶1和4∶1時的持水性較好.
니탄화점토불동비례배합토안동일용중장전도배도중,채용고속리심궤법화대기평형법측정배합토적불동흡력하토양적함수량,병이용Van Ge nnuchten수학모형대수분특정곡선진행의합,진이래분석니탄여점토배합토적지수능력.연구결과표명:①니탄화점토(＜1 mm)비례위3∶1시적지수능력교강,우우기타배비 .②니탄화점토(3～5 mm)비례위3∶1화4∶1시적지수성교호.
The mixed soil made from the peat and clay with a certain amount of density according to different proportion was loaded into cent ral knife. Then soil moisture content was measured and analyzed and the water ch aracteristic curve was imitated with Van Gennuchten mathematical model under dif ferent suction using high-speed centrifuges and atmospheric balance mensurate, so as to analyze the difference of water-holding capacity of the mixed soil wit h various ratios of peat and clay. The results show that: ①If the ratio of peat and clay (less than 1 mm) is 3∶1, the water-holding capacity is stronger than other ratio. ②If the ratio of peat and clay (3～5 mm) is 3∶1 and 4∶1, the wat er-holding capacity is better.
