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| 氮素水平对粳稻根系形态及其活力的影响 | |
| 引用本文： | 孙静文,陈温福,曾雅琴,马英杰. 氮素水平对粳稻根系形态及其活力的影响[J]. 沈阳农业大学学报, 2003, 34(5): 344-346 |
| 作者姓名： | 孙静文 陈温福 曾雅琴 马英杰 |
| 作者单位： | 1. 沈阳农业大学,稻作室,辽宁,沈阳,110161 2. 沈阳市种子公司,辽宁,沈阳,110161 3. 辽中县农业技术推广中心站,辽宁,沈阳,110000 |
| 基金项目： | 国家863项目(2001AA241014)，教育部跨世纪优秀人才培养基金项目 |
| 摘 要： | 以秋光和辽粳5号为试材，采用盆栽方法，研究了不同供氮水平对根系的影响。研究结果表明：生育前期各处理的水稻根数、最长根长、根体积、根干重及其根系活力差异不显；在拔节期，高氮素水平有利于促进根系生长，提高根系活力；抽穗期是水稻一生中根系生长和活力变化的转折点，抽穗期后根系各性状呈现大幅度下降趋势，但高氮水平下根系各性状降幅较小，这说明适当提高氮素供应水平有利于维持后期根系活力，延缓根系衰老。 |
| 关 键 词： | 氮素水平 粳稻 根系 形态 活力 秋光 辽粳5号 生育前期 拔节期 抽穗期 |
| 文章编号： | 1000-1700(2003)05-0344-03 |
| 修稿时间： | 2003-08-16 |
Effects of different levels of Nitrogen on Root Morphological Characteristics and Activities in Japonica Rice |
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| SUN Jing-wen,CHEN Wen-fu,et al.. Effects of different levels of Nitrogen on Root Morphological Characteristics and Activities in Japonica Rice[J]. Journal of Shenyang Aricultural University, 2003, 34(5): 344-346 | |
| Authors: | SUN Jing-wen CHEN Wen-fu et al. |
| Abstract: | With japonica rice varieties of Akihikari Liaojing 5 as materials, effects of different levels of nitrogen treatment on japonica rice roots were studied under pot-culture conditions. The results showed that there was not obvious difference among the number, max-length, volume, dry weight and activity of roots with different levels of nitrogen treatment at early stage; during the jointing stage, high level of nitrogen contributed to root growth and increased its activity; heading stage was a key stage to root systems, from then on, the root grew slowly and its activity decreased to a great extent, but changes happened more slowly under high nitrogen condition. This might proved that high nitrogen is positive to maintain root activity and postpone root senescence. |
| Keywords: | its root morphological character root activity nitrogen |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |