| 苹果不同生育期根系分区灌水的生理效应研究 |
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| 作者姓名： | 邹养军 魏钦平 李嘉瑞 王小伟 高照全 |
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| 作者单位： | 西北农林科技大学园艺学院 陕西杨凌712100
(邹养军，李嘉瑞)，北京市农林科学院林业果树研究所 北京100093
(魏钦平，王小伟)，北京市农林科学院林业果树研究所 北京100093(高照全) |
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| 基金项目： | 北京市科委重大项目（H030730050130）和北京市农委项目（20030112）资助. |
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| 摘 要： | 根系分区灌水是一种新型灌水技术,在不影响产量的前提下能够提高水分利用效率。通过春梢生长期、春梢停长期、秋梢生长期苹果根系分区灌水试验,研究了不同生育期1/4、2/4、3/4根系体积灌水对苹果植株水分状况、生长习性和叶片Pn、Tr、Gs、WUE等生理指标的影响。结果表明,春梢生长期1/4根系体积灌水即可满足植株的水分需求,而春梢停长期、秋梢生长期需要2/4根系灌水;减小灌水根系体积后,新梢和叶片生长被抑制,叶片Pn、Tr、Gs降低,由于Tr较Pn下降幅度大,WUE明显提高。
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| 关 键 词： | 根系分区灌水 生育期 水分生理 苹果 |
Studies on Effects of Partial Rootzone Irrigation in Different Stages of Development on Apple Trees |
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| Authors: | Zou Yangjun Wei Qinping Li Jiarui Wang Xiaowei Gao Zhaoquan |
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| Abstract: | Partial rootzone irrigation (PRI) was a novel irrigation technique, which improves the water use efficiency when the production wasn''t decreased. In this article split-root apple plants were used in different growth stages for PRI. The effects of PRI on water status, growth, net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), leaf water use efficiency (WUE) were studied. The results showed plant''s water status didn''t change when only partial rootzone irrigated, but the growth of shoots and leaves were inhabited. The Pn?Tr?Gs and Gs of leaves decreased when only partial rootzone irrigated. Because Tr decreased more than Pn , the WUE was increased. |
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| Keywords: | Partial rootzone irrigation (PRI) Stage of development Water physiology Apples |
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