| 水分胁迫对梨幼树叶水势的影响 |
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| 引用本文： | 曹铁森,许明宪,王维友.水分胁迫对梨幼树叶水势的影响[J].西北农林科技大学学报(社会科学版),1992,20(1):91-94. |
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| 作者姓名： | 曹铁森 许明宪 王维友 |
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| 作者单位： | 中国科学院石家庄农业现代化研究所 河北石家庄·050021
(曹铁森)，西北农业大学 陕西杨陵·712100
(许明宪)，甘肃省张掖地区农科所 甘肃张掖·734000
(王维友)，甘肃省张掖地区农科所 甘肃张掖·734000(孙炳玲) |
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| 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。
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| 关 键 词： | 梨幼树 叶水势 土壤含水量 水分胁迫 |
Effects of Water Stress on Leaf Water Potential in Young Pear Trees |
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| Cao Tiesen.Effects of Water Stress on Leaf Water Potential in Young Pear Trees[J].Journal of Northwest Sci-Tech Univ of Agr and,1992,20(1):91-94. |
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| Authors: | Cao Tiesen |
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| Abstract: | 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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| Keywords: | young pear tree leaf water potential soil moisture content water stress |
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