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《Journal of Northwest Sci-Tech University of Agriculture and Forestry》 1992-01
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Effects of Water Stress on Leaf Water Potential in Young Pear Trees

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)  
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%.
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