| 土壤干旱下氮磷营养对玉米气体交换的影响 |
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| 引用本文： | 张岁岐,山仑,赵丽英.土壤干旱下氮磷营养对玉米气体交换的影响[J].植物营养与肥料学报,2002,8(3):271-275. |
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| 作者姓名： | 张岁岐 山仑 赵丽英 |
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| 作者单位： | 1.中国科学院水利部水土保持研究所、西北农林科技大学黄土高原土壤侵蚀和旱地农业国家重点实验室,陕西杨凌 712100 |
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| 基金项目： | 国家重点基础研究专项经费(G1999011708);国家自然科学基金项目(30170559)资助. |
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| 摘 要： | 在盆栽条件下就氮磷营养对玉米叶片气体交换的影响进行了比较研究。结果发现 :虽然土壤干旱条件下 ,氮磷均增大了玉米叶片的气孔导度 ,但氮对促进干旱条件下气孔开放的作用要显著大于磷的作用 ;土壤干旱条件下 ,氮磷均有增大玉米叶片光合速率的作用 ,但氮有同时减小光合的气孔和非气孔限制的作用 ,而磷提高干旱条件下的光合速率则主要以减小光合的非气孔限制 (提高叶肉光合活性 )为主 ;由于氮磷对玉米叶片气孔导度和光合作用的不同影响 ,因而表现出其在提高干旱条件下玉米叶片水分利用效率方面的不同作用 ,其中磷对提高干旱条件下玉米水分利用效率的作用更为明显
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| 关 键 词： | 氮磷营养 土壤干旱 气体交换 玉米 |
| 文章编号： | 1008-505X(2002)03-0271-05 |
| 修稿时间： | 2001年8月27日 |
Effect of nitrogen and phosphorus nutrition on gas exchange of maize under drought conditions |
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| ZHANG Sui-qi,SHAN Lun,ZHAO Li-ying.Effect of nitrogen and phosphorus nutrition on gas exchange of maize under drought conditions[J].Plant Nutrition and Fertilizer Science,2002,8(3):271-275. |
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| Authors: | ZHANG Sui-qi SHAN Lun ZHAO Li-ying |
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| Institution: | 1.Inst. of Soil and Water Conserv.;CAS and MOW;Northwest Sci-Tech Univ. of Agric. and Forestry;State Key Lab. of Soil Erosion and Dryland Farming on Loess Plateau;Yangling;Shaanxi 712100;China |
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| Abstract: | Effects of nitrogen and phosphorus nutrition on gas exchange of maize (Zea Mays) were studied under soil drought conditions. The results show that nitrogen and phosphorus nutrition increase stomatal conductance of maize, but the role of nitrogen nutrition is bigger than that of phosphorus nutrition. Under drought conditions, nitrogen and phosphorus nutrition increased photosynthesis rate of maize, but the reason to raise photosynthesis rate is difference, nitrogen nutrition decreased stomatal and non-stomatal limits of photosynthesis simultaneously, but phosphorus nutrition mainly decreased non-stomatal limits of photosynthesis. So the role of phosphorus nutrition is bigger than that of nitrogen nutrition in raising water use efficiency of maize under drought condition. |
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