甘肃石羊河流域人工种植新疆杨耗水规律研究  

Study on water consumption of irrigated Populus alba var. Pyramidalis in Shiyang River Basin

作　　者：屈艳萍[1,2] 康绍忠[3] 王素芬[3] 

机构地区：[1]中国水利水电科学研究院,北京100038 [2]水利部防洪抗旱减灾工程技术研究中心,北京100038 [3]中国农业大学中国农业水问题研究中心,北京100083

出　　处：《中国水利水电科学研究院学报》2014年第2期130-137,共8页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家自然科学基金青年科学基金项目(51109211);中国水利水电科学研究院科研专项资助(防1225)

摘　　要：研究了甘肃石羊河流域人工种植防风固沙植物新疆杨的耗水规律,结果表明:新疆杨树干日液流量变化幅度较大,呈现明显的季节变化规律,且随发芽后天数的变化呈典型的二次抛物线型,确定系数达0.765;新疆杨树干日液流量与日平均气温、水汽压差、太阳辐射、风速等气象因子的多元线性逐步回归模型的确定系数为0.807,与日平均气温、水汽压差、太阳辐射等气象因子的偏相关系数分别为0.637、0.188和0.373,日平均气温是其最主要的影响因素;5—10月,新疆杨总蒸散量为508.26 mm,蒸发量、蒸腾量所占比率分别为37.1%和62.9%,液流—株间微型蒸渗仪法和水量平衡法测算结果的相对误差在±15%以内,液流-株间微型蒸渗仪法能够适用于新疆杨蒸散量测定。The water consumption of irrigated Populus alba var. Pyramidalis was studied in Shiyang River Basin. The results indicated that the daily sap flux in the trunk of Populus alba var. Pyramidalis showed obvious seasonal pattern, and correlated quadratic parabolic curve with the days after bud burst （DAB）, with a determination coefficient of 0.765. The multiple linear regression of the daily sap flux （SF） of Popu-lus alba var. Pyramidalis with mean daily air tempreature （Ta）, mean daily vapour pressure deficit （VPD）, mean daily solar radiation （Rs） and mean daily wind speed （Vw） was programmed by SPSS using the stepwise regression method,with a high determination coefficient of 0.807. The partial coefficients be-tween SF and Ta,VPD,Rs were 0.637,0.188 and 0.373,respectively,indicating Ta was the prime meteo-rological factors. The combination method of Sap flow and Micro-lysimeter was used to measure the evapo-transpiration of irrigated Populus alba var. Pyramidalis., and its applicability was analyzed. In the growing season （from May to October）, the overall evapotranspiration was 508.26 mm, with the proportion of 37.1% and 62.9% for evaporation and transpiration,respectively. The water balance method was used to es-timate the evapotranspiration of Populus alba var. Pyramidali.,with the relative error within ＆#177;15%,validat-ing the applicability of combination method of Sap flow and Micro-lysimeter.

关 键 词：新疆杨 树干日液流量 气象因子 液流-株间微型蒸渗仪法 水量平衡法 

分 类 号：Q948[生物学—植物学]