摘要
利用热扩散茎流测定系统(TDP)对渭北高原矮化红富士树干液流进行长期定点定位观测,对苹果树开花期和新梢生长期的树干液流时空变化特征进行了分析,结果表明:晴天条件下,开花期表现为单峰曲线,日平均液流速率为0.55 L.h-1,白天液流量占全天的86.84%;新梢生长期内表现为双峰曲线,日平均液流速率为1.16 L.h-1,白天液流量占全天的92.87%。阴天天气下呈多峰曲线。4、5、6月日平均液流量分别为2.40、3.17、3.95 mm。树干液流速率在树干东南和西南方向基本一致,北方向的树干液流速率较小,大约是前者的50%。
Stem sap flow dynamics of dwarfing Fuiji apple tee on the Weibei plateau were studied by means of themal diffusion stem sap flow measurement system（TDP）. Spatiotemporal variation characteristics of the stem sap flow during blossoming and shoot growth periods were analyzed. The results showed that during the blossoming period of the sunny days, the stem sap flow presented as a single-peak curve, with the daily flow rate 0.55 L ·h^-1. and 86.84% of it occurred in the day time,during the shoot growth period, the curve was bimodal,with the daily flow rate 1.16 L ·h^-1 , and 92.87% of it were in the day time; On cloudy, multi-peak curve was showed in both bloom and shoot growth; From April to June, the average daily water consumption was 2. 40 mm, 3. 17 mm, 3. 95 mm respectively. Stem sap flow rates of the southeast and southwest part of the tree were basicall the same, but different to the north, which was about half of the othrers.
出处
《西北林学院学报》
CSCD
北大核心
2008年第3期90-93,共4页
Journal of Northwest Forestry University
基金
国家科技支撑计划项目“坡面降雨径流调控与高效利用技术”(2006BAD09B01-3)
