| 玉米、旱稻、豇豆、棉花叶片气体交换对水分胁迫的反应 |
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| 引用本文： | 荆家海 马书尚. 玉米、旱稻、豇豆、棉花叶片气体交换对水分胁迫的反应[J]. 作物学报, 1990, 16(4): 342-348 |
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| 作者姓名： | 荆家海 马书尚 |
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| 作者单位： | 西北农业大学; 陕西杨陵 |
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| 摘 要： | 四种作物叶片气体交换特性对水分胁迫的反应不同。高叶水势下,气孔阻力低,净光合速率是玉米>旱稻>豇豆>棉花,而蒸腾速率是棉花>豇豆>旱稻>玉米。气孔阻力对轻度水分亏缺无反应。随着水分胁迫加剧,叶水势达到某一阈值,气孔阻力突然增加。气孔开始关闭水势阈值分别为:-0.8(玉米)、-0.4(豇豆)、-1.2MPa(旱稻、棉花)。净光合速率
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| 关 键 词： | 水分胁迫 蒸腾速率 净光合速率 气孔导度 叶水势 |
| 收稿时间： | 1990-02-03 |
| 修稿时间： | 1990-05-12 |
Responses of Leaf Gas Exchange to Water Stress in Maize,Upland Rice,Cowpea and Cotton |
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| Jing Jiahai Ma Shushang. Responses of Leaf Gas Exchange to Water Stress in Maize,Upland Rice,Cowpea and Cotton[J]. Acta Agronomica Sinica, 1990, 16(4): 342-348 |
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| Authors: | Jing Jiahai Ma Shushang |
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| Affiliation: | Northwestern Agriculture University; Yangling; Shaanxi |
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| Abstract: | The responses of the gas exchange characteristics of leaves of 4 different crops towater stress are different.Under high water potential and low stomatal resistance,theorder of the P_N of the crops was maize>upland rice>cowpea>cotton,whereas that ofTR was cotton>cowpea>upland rice>maize.There was no |
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| Keywords: | Water stress Transpiration rate Net photosynthesis rate Stomatal conductance Leaf water potential |
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