干旱胁迫对柔枝松幼苗耗水的影响  

The Effect of Drought Stress on Water Consumption of the Seedlings of Pinus flexilis James

作　　者：马书燕[1] 李吉跃[2,3] 彭祚登[3] 

机构地区：[1]唐山职业技术学院,河北唐山063004 [2]华南农业大学林学院,广东广州510642 [3]北京林业大学资源与环境学院,北京林业大学省部共建森林培育与保护教育部重点实验室,国家林业局干旱半干旱地区森林培育与生态系统研究重点实验室,北京100083

出　　处：《安徽农业科学》2012年第2期863-865,共3页Journal of Anhui Agricultural Sciences

基　　金：国家"948"引进国际先进农业科学技术项目"柔枝松优良抗逆性种质资源及快繁技术引进"(2003-4-05)

摘　　要：[目的]研究干旱胁迫对柔枝松幼苗耗水的影响。[方法]选择6个柔枝松种源大小一致的2年生移栽苗,研究不同干旱时期的耗水量和耗水速率。[结果]苗木耗水量和耗水速率的日变化呈"单峰型",种源Rsi的耗水量和耗水速率的变化最小,且日变化较稳定,种源Rs和Rl下降较大。根据耗水量和耗水速率判断,种源Rsi较耐旱。[结论]为其抗旱机理研究提供理论依据。[ Objective ] The aim was to study water consumption of the seedlings of Pinus flexilis James. [ Method] Selecting six 1 -year tra^s- planting seedlings, water consumption and rates of water consumption under different drought periods were studied. [ Result ] The study showed that the daily variations in quantities and rates of water consumption （ WCQ and WCR） of seedlings were single peak type ,The variation of quan- tity of water consumption and water consumption rate of provenances Rsi was the smallest, and the daily variations in quantities and rates of water consumption （WCQ and WCR） of seedlings were steady, Rs and RI decreased greatly. According to water consumption and water consumption rate, Rsi was more drought tderance. [ Conclusion ] The study provided theoretical basis for the study on drought resistance mechanism of Pinus flexilis James.

关 键 词：柔枝松 耗水量 耗水速率 

分 类 号：S162.5[农业科学—农业气象学]