以新疆阿克苏6 年生的核桃树为观测对象, 采用大田试验方法, 利用美国Dynamax 公司生产的包裹式茎流仪 测定不同生育期内单株核桃树不同时段的蒸腾速率, 研究核桃树蒸腾变化规律及其与气象因子的关系。得出了蒸 腾速率的日变化规律是晴天条件下, 各月呈单峰曲线, 阴天条件下, 各月呈双峰或多峰曲线; 蒸腾速率与太阳辐射和 气温Ta 具有较好的正相关关系, 与湿度RH 具有负相关关系

The transpirat ion rates of sing le 62year2o ld w alnut t ree at different per io ds dur ing different g rowth stag es in Aksu of Xinjiang wer e measured using the packaged sap flow system produced by Dy namax Company o f America. The r elatio nship be2 tw een the var iation law s of tr anspirat ion rate o f walnut tr ees and met eo ro lo gical factor s w as investig ated. The results indicated that the diurnal var iatio n of the t ranspir atio n rat e show s the sing le2peak curv e in sunny day s, and t he bimodal or multi2peak curv e in cloudy days. T ranspiratio n rat e had a g ood po sitive cor relat ion w ith so lar r adiation and temperature Ta, but neg ativ e co rr elation wit h humidity RH .

新疆维吾尔自治区重大专项( 20113010321) ; 国家科技支撑计划项目( 2011Bad29B05) ; 新疆维吾尔自治区水利水电工程重点学 科资助项目( XJZDXK220022 10205) ; 新疆水利科技项( 2013G03)