单 位：
西北农业大学;甘肃省张掖地区农科所;中国科学院石家庄农业现代化研究所
摘 要：
采用盆栽1年生苹果梨幼苗作试材,研究水分胁迫对叶水势的影响。结果表明:一天中叶水势值与土壤水分状况密切相关,叶水势与土壤含水量呈正相关,回归方程为变形双曲线;当土壤含水量在9.5％以下时,随土壤含水量的下降叶水势迅速下降;当土壤含水量在9.5％以上时,随土壤含水量的下降叶水势变化不明显。保证梨幼树正常生长的土壤含水量应保持在9,5％以上。
译 名：
Effects of Water Stress on Leaf Water Potential in Young Pear Trees
作 者：
Cao Tiesen(Institute of Agricultural Modernization, Academia Sinica, Shijiazhuang, 050021)Xu Mingxian(Northwestern Agricultural University, Yangling, Shaanxi, 712100)Wang Weiyou Sun Singling(Agricultural science Institute, Zhangye, Gansu, 734000)
关键词：
young pear tree, leaf water potential, soil moisture content, water stress
摘 要：
The effects of water stress on leaf water potential were studied in one-year-old potted pear trees. The results showed that there was a close relation between leaf water potential and soil moisture during a day. The leaf water potential was positively correlated with soil moisture. The regression equation was the deformed double curve. When soil moisture contents were below 9.5%, leaf water potential dropped rapidly with a decrease in soil moisture contents. When soil moisture contents were above 9.5%, there was no apparent change in leaf water potential with a drop in soil moisture contents. Therefore, it was necessary for young pear tress to grow well to keep an adequate soil moisture above 9.5%.
