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| 氮形态对水稻植株氮损失的影响 | |
| 引用本文： | 王巧兰,吴礼树,赵竹青,黄利民.氮形态对水稻植株氮损失的影响[J].华中农业大学学报,2010,29(3):312-316. |
| 作者姓名： | 王巧兰 吴礼树 赵竹青 黄利民 |
| 作者单位： | 1. 华中农业大学资源与环境学院,武汉,430070;军事经济学院军需系,武汉,430035 2. 华中农业大学资源与环境学院,武汉,430070 3. 军事经济学院军需系,武汉,430035 |
| 基金项目： | 国家科技支撑计划项目 |
| 摘 要： | 在溶液培养条件下,利用15N示踪法研究了不同形态氮对水稻植株氮损失的影响,并分析了影响氮损失的因素.水稻幼苗先在以15N为氮源的营养液中生长2周,然后转入供给不同氮形态的营养液中培养10 d.结果表明:供给NH4+-N的水稻长势最好,收获时地上部和根部生物量均高于其他氮形态处理,但其氮损失量也最大,损失率达到17.06%;供给复合氮源NH4NO3的水稻生物量和供给NH4+-N的相差不大,然而其氮损失率却显著下降,仅为9.96%,说明供给复合氮源可在不影响水稻生长的条件下,降低植株氮损失,提高其氮肥利用率.此外,供给NH4+-N的水稻叶片中NH4+含量、谷草转氨酶活性及叶片组织pH值均高于其他氮形态处理,表明植物体内NH4+浓度增加而引起的氨挥发可能是导致植物氮损失的原因之一. |
| 关 键 词： | 水稻 氮形态 植株氮损失 |
| 收稿时间： | 2009/11/11 0:00:00 |
| 修稿时间： | 2010/3/11 0:00:00 |
Effects of Nitrogen Form on Nitrogen Loss of Rice Plant |
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| WANG Qiao-lan,WU Li-shu,ZHAO Zhu-qing and HUANG Li-min.Effects of Nitrogen Form on Nitrogen Loss of Rice Plant[J].Journal of Huazhong Agricultural University,2010,29(3):312-316. | |
| Authors: | WANG Qiao-lan WU Li-shu ZHAO Zhu-qing and HUANG Li-min |
| Institution: | College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China;Department of Quarter master,Military Economic Academy,Wuhan 430035,China,College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China;,College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China; and Department of Quarter master,Military Economic Academy,Wuhan 430035,China |
| Abstract: | 15N tracer method was adopted to study the effects of different nitrogen forms (NH4+-N,NO3--N and NH4NO3) on the N loss of rice plant under the solution culture,and the factors affecting the N loss were analyzed.Firstly,rice seedlings were cultured in nutrient solution and fed with 15N (abundance 10%) for two weeks,and then transferred to the nutrient solution culture with different nitrogen forms for 10 d.The results showed that the rice with application NH4+-N had the highest biomass and the largest amount of N loss with the N loss rate of 17.06% compared with other nitrogen forms.The rice supplied the complex nitrogen source (NH4NO3) had no significant differences in biomass compared with that of NH4+-N,but the N loss rate decreased significantly with only 9.96%.The results indicated that the application of NH4NO3 decreased N loss of rice plant,and improved the nitrogen utilization efficiency without affecting the rice growth.In addition, NH4+ content,GOT activity and pH values of rice leaves applied with NH4+-N were higher than other nitrogen forms,indicating that ammonia volatilization resulted from the increase of NH4+ content of plant may be the main cause of the N loss of the plant. |
| Keywords: | Oryza sativa nitrogen forms N loss of the plant |
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