| 分根区干湿交替对玉米光合速率及蒸腾效率的影响 |
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| 引用本文： | 武永军,梁宗锁.分根区干湿交替对玉米光合速率及蒸腾效率的影响[J].西北植物学报,1999,19(4):605-611. |
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| 作者姓名： | 武永军 梁宗锁 |
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| 作者单位： | 1. 西北农业大学农业水土工程研究所,陕西,杨陵,712100
2. 中国科学院水利部水土保持研究所,陕西,杨陵,712100 |
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| 基金项目： | ：国家自然科学基金资助项目(59679025) |
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| 摘 要： | 以玉米为材料研究了分根区干湿交替对叶片光合速度及蒸腾效率的影响，结果发现控制１／２根区交替供水和固定１／２根区供水在减少用水量的同时，叶片蒸腾速度明显下降，而光合速度不明显，蒸腾效率提高；控制１／２根区交替供水比固定１／２根区供水在光合维持高水平稳定时所要求的土壤含水量低，其蒸腾效率较高。干湿交替能够增加根冠比、根干重和根九。证明控制性分根交灌溉可提高玉米腾效率达到节水的目的。
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| 关 键 词： | 分根区干湿交替 玉米 光合速率 蒸腾速率 灌溉 |
| 文章编号： | 1000-4025-(1999)04-0605-07 |
| 修稿时间： | :1999-05-0 |
Photosynthesis rate and transpiration efficiency change by alternately drying and wetting on maize plant |
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| WU Yong-jun,LIU Hong-xia,LIANG Zong-suo,KANG Shao-zhong.Photosynthesis rate and transpiration efficiency change by alternately drying and wetting on maize plant[J].Acta Botanica Boreali-Occidentalia Sinica,1999,19(4):605-611. |
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| Authors: | WU Yong-jun LIU Hong-xia LIANG Zong-suo KANG Shao-zhong |
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| Abstract: | Photosynthesis rate (Pn) and
transpiration efficieney (WUE) change on maize plant was studied in alternate
drying-wetting,The result showed that controlled 1/2 root divided alternate irrigation and
1/2 root-divided fix irrigation can decrease water consumption and transpiration rate.But
Pn is not decreased significantly and then increase WUE.In same soil water content,WUE and
Pn of controlled roots-divided alter-nate irrigation is higher than that of 1/2
roots-divided fix irrigation.Alternate drying-wetting can in crease root dry weight ratio
of root to shoot and root number.It is concluded that controlled roots-divided alternative
irrigation is the practicable technology of water-saving. |
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