| 开放式空气CO2浓度增高对水稻N素吸收利用的影响 |
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| 引用本文： | 董桂春,王余龙,杨洪建,黄建晔,朱建国,杨连新,单玉华.开放式空气CO2浓度增高对水稻N素吸收利用的影响[J].应用生态学报,2002,13(10):1219-1222. |
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| 作者姓名： | 董桂春 王余龙 杨洪建 黄建晔 朱建国 杨连新 单玉华 |
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| 作者单位： | 1. 扬州大学农业部作物栽培生理重点实验室,扬州,225009
2. 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 中国科学院知识创新重要方向项目 (KZCX 2 40 8)，国家自然科学基金重大国际合作研究资助项目 (4 0 12 0 14 0 817) . |
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| 摘 要： | 在大田栽培条件下 ,研究空气中CO2 浓度增高 (FACE) 2 0 0 μmol·mol-1对水稻N素吸收及其利用效率的影响 .结果表明 ,FACE处理使水稻不同生育时期的植株含N率显著下降 ;由于干物质生产量显著增大 ,FACE处理使水稻不同生育时期的N素累积量有所提高 ,但无显著影响 ;FACE处理能够显著提高移栽后 2 8d、抽穗期以及成熟期单位N素的干物质生产效率、单位N素的籽粒生产效率和显著提高水稻的N素收获指数 .高N处理的植株含N率、N素累积量均有所增加 ,但使N素生产效率呈现下降趋势 .
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| 关 键 词： | 开放式空气CO2浓度增高 水稻 含N率 N素生产效率 N素吸收利用 |
| 文章编号： | 1001-9332(2002)10-1219-04 |
| 修稿时间： | 2002年6月12日 |
Effect of free-air CO2 enrichment (FACE) on nitrogen accumulation and utilization efficiency in rice (Oryza sativa) |
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| DONG Guichun,WANG Yulong,YANG Hongjian,HUANG Jianye,ZHU Jianguo,YANG Lianxin,SHAN Yuhua.Effect of free-air CO2 enrichment (FACE) on nitrogen accumulation and utilization efficiency in rice (Oryza sativa)[J].Chinese Journal of Applied Ecology,2002,13(10):1219-1222. |
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| Authors: | DONG Guichun WANG Yulong YANG Hongjian HUANG Jianye ZHU Jianguo YANG Lianxin SHAN Yuhua |
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| Institution: | Key Laboratory of Crop Cultivation and Physiology, Ministry of Agriculture, Yangzhou University, Yangzhou 225009. gcdong@mail.yzu.edu.cn |
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| Abstract: | Effect of FACE, 200 mumol.mol-1 CO2 elevation under field condition in this study, on nitrogen accumulation and nitrogen use efficiency in rice was investigated. Results showed that nitrogen content (%) in rice plant sampled at different growth stages decreased significantly under FACE treatment, but FACE had no obvious effect on nitrogen accumulation in rice plant due to the significant enhancement in dry matter production. FACE treatment resulted in the significant increase in nitrogen use efficiency for biomass production (NUEp) which was measured at 28th day after transplanting, at heading and at maturity, respectively. Significant increase in nitrogen use efficiency for grain output (NUEg) and nitrogen harvest index (NHI) under FACE treatment was also observed in this study. Nitrogen content (%) and nitrogen accumulation in rice plant were increased under high N, but nitrogen use efficiency in rice plant were decreased. |
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| Keywords: | Rice Free-air CO 2 enrichment Nitrogen content Nitrogen use efficiency |
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