【作者】 刘春伟； 关芳； 杜太生； 康敏；

【Author】 Liu Chunwei,Guan Fang,Du Taisheng,Kang Min (Center for Agricultural Water Research in China,China Agricultural University,Beijing 100083,China)

【机构】 中国农业大学中国农业水问题研究中心；

【摘要】 本研究以西北地区23年盛果期苹果树为研究对象,试验设置为充分灌水,应用热脉冲技术对苹果树液流规律进行连续监测。依据监测结果确定了西北旱区苹果树耗水量,利用净辐射等环境因素计算单株果树液流量并采用不同模型对液流进行模拟。结果表明:2008和2009年全生育期的平均蒸发蒸腾量分别为3.99mm/d和3.85mm/d;日平均液流量均在展叶幼果期达到峰值,分别为3.77mm/d和3.76mm/d;西北旱区苹果树作物系数为1.12;参考作物蒸发蒸腾量在整个生育期的6月中旬到7月下旬最大;整个生育期,苹果树日均液流量的峰值出现在6月下旬左右,大小约为,5mm/d;液流速率日变化呈单峰曲线,峰值约为7L/h;对不同的液流模拟模型进行分析,认为通过Penman-Monteith公式估算果树耗水相对准确。更多还原

【Abstract】 The experiment was carried out on 23-year-old apple trees in northwest China. Three well-watered apple trees were selected and continuously monitored sap flow by heat pulse method.The water consume of apple yard in dry area requires definite quantity and to model the sap flow by net radiation or other environmental factor is imperative.The average diurnal evapotranspiration in the whole measuring period are 3.99mm/d and 3.85mm/d in 2008 and 2009,respectively.The maximum average daily sap flow of different years are 3.77mm/d and 3.76mm/d in the Leaf Expanding and Young Fructification physiology period.The average crop coefficient of the apple yard in the northwest China is 1.12.The reference evapotranspiration achieves the peak value from the middle June to late July in the whole physiology period,and the maximum of the sap flow appears at the late June,approximately achieves at 5mm/d.The peak value of the sap flow velocity is about 7L/h.We suggest using the Penman-Monteith model to get the water consume more exactly.更多还原