| 水稻对硝态氮响应的生理指标筛选 |
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| 引用本文： | 张亚丽,段英华,沈其荣.水稻对硝态氮响应的生理指标筛选[J].土壤学报,2004,41(4):571-576. |
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| 作者姓名： | 张亚丽 段英华 沈其荣 |
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| 作者单位： | 南京农业大学资源与环境科学学院,南京,210095 |
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| 基金项目： | 国家自然科学基金重大项目(30390080)，南京农业大学校内科研创新基金(KJ03005)资助 |
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| 摘 要： | 采用温室水培试验方法 ,系统评价了 4 0个遗传特性不同的水稻品种对 3种比例氮营养(NH 4 /NO-3 比例分别为 10 0∶0、5 0∶5 0和 0∶10 0 )的反应和对硝态氮响应的生理指标筛选。结果表明 ,4 0个水稻品种 (系 )在NH 4 /NO-3 比为 5 0∶5 0的营养液中生长最佳 ,植株总干重最高 ,但各个基因型的表现差异较大。根据水稻在两种比例氮营养液 (10 0∶0和 5 0∶5 0 )中的表现可将水稻分为 3种类型 :硝高度响应型、硝中度响应型、硝不响应型。在混合氮营养液中硝高度响应型水稻地上部干重、根干重、总干重和氮积累量显著比单一铵营养液中的高。在评价不同水稻基因型对硝营养的响应时 ,根干物重和氮积累量可作为筛选的主要生理指标
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| 关 键 词： | 水稻 品种 不同氮形态 |
| 收稿时间： | 2003/9/25 0:00:00 |
| 修稿时间： | 2003/12/1 0:00:00 |
SCREENING OF PHYSIOLOGICAL INDICES FOR RESPONSE OF RICE TO NITRATE |
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| Zhang Yali,Duan Yinghua and Shen Qirong.SCREENING OF PHYSIOLOGICAL INDICES FOR RESPONSE OF RICE TO NITRATE[J].Acta Pedologica Sinica,2004,41(4):571-576. |
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| Authors: | Zhang Yali Duan Yinghua and Shen Qirong |
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| Affiliation: | College of Resources and Environmental Sciences, Nanjing Agric Univ, Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agric Univ, Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agric Univ, Nanjing 210095, China |
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| Abstract: | Rice is one of the main crops in China and needs a lot of nitrogen fertilizer to ensure high yields Thus,nitrogen take up and utilization efficiency by rice is an important issue in agricultural production Due to inhibited nitrificaton in the bulk soil of lowland rice field,researches on nitrogen nutrition of rice mainly focus much more on ammonium(NH4+) than on nitrate(NO3-) Much evidence has shown that rice can take up not only NH4+-N but also NO3--N,but is different in capacity which varies with its genotype The responses of rice to different nitrogen forms and their physiological effects are poorly understood Hydroponic culture experiments were carried out to study the response of rice to different nitrogen forms(NH4+/NO3- ratios of 100:0,50:50,and 0:100) Best growth of rice plants of all genotypes tested was found in the mixed solution of NH4+ and NO3- but crops different in genotypes responded differently Based on the rice growth in two nitrogen solutions,i.e.,NH4+/NO3- ratios of 100:0 and 50:50,the 40 varieties of rice tested could be divided into three groups,such as high response to NO3-,intermediate response to NO3- and non-response to NO3-Rice with high response to NO3- had much higher root dry weight and nitrogen accumulation in the mixed solution of ammonium and nitrate than in the single ammonium solution Thus,the root dry weight and nitrogen accumulation could be used as physiological indices for screening rice of genotypes with different responses to nitrate. |
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| Keywords: | Rice Genotype Nitrogen form |
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