| 不同水分条件下NO3--N供应对水稻生长·氮吸收速率的影响 |
| |
| 引用本文： | 薛小康,胡廷旭,柏彦超,钱晓晴,单玉华.不同水分条件下NO3--N供应对水稻生长·氮吸收速率的影响[J].安徽农业科学,2012,40(9):5271-5272,5292. |
| |
| 作者姓名： | 薛小康 胡廷旭 柏彦超 钱晓晴 单玉华 |
| |
| 作者单位： | 扬州大学环境科学与工程学院,江苏省扬州农业环境安全技术服务中心,江苏扬州225009;扬州大学环境科学与工程学院,江苏省扬州农业环境安全技术服务中心,江苏扬州225009;扬州大学环境科学与工程学院,江苏省扬州农业环境安全技术服务中心,江苏扬州225009;扬州大学环境科学与工程学院,江苏省扬州农业环境安全技术服务中心,江苏扬州225009;扬州大学环境科学与工程学院,江苏省扬州农业环境安全技术服务中心,江苏扬州225009 |
| |
| 基金项目： | 扬州大学大学生学术科技创新基金项目(2010-195) |
| |
| 摘 要： | 目的]研究不同水分条件下NO3--N供应对武育粳3号水稻生长及氮素吸收速率的影响。方法]采用室内营养液培养试验,聚乙二醇(PEG6000)模拟水分胁迫处理的方法。结果]在正常水分条件下,硝态氮供应量达60 mg/L时,水稻幼苗植株生物量最大,而NO3--N供应量对水稻幼苗的株高无显著影响,NO3--N的吸收速率均随着NO3--N供应量的增加而增加。水分胁迫条件下,水稻幼苗植株生物量随着NO3--N供应量的增加而下降,水稻幼苗株高随NO3--N供应量的增加而减少,水稻幼苗根长、平均直径、体积、表面积、根尖数均随着NO3--N供应量的增加呈下降趋势。结论]水分胁迫影响水稻生长对NO3--N供应的响应,降低水稻对NO3--N的吸收速率。
|
| 关 键 词： | 水稻 水分胁迫 NO3--N 吸收速率 |
Responses of Rice Growth and N Uptake to NO3- -N Supply under Different Water Regimes |
| |
| Institution: | XUE Xiao-kang et al(College of Environmental Science and Engineering,Yangzhou University,Technical Service Center of Agro-environmental Safety of Jiangsu Province,Yangzhou,Jiangsu 225009) |
| |
| Abstract: | Objective] The research aimed to study the effects of NO-3-N supply on growth and N uptake of rice cultivar "Wuyujing 3" under different water regimes.Method] Rice seedlings were solution-cultured and different water regimes were generated by using PEG6000.Result] Under normal water condition,the maximum biomass of rice seedlings were obtained when 60 mg/L NO-3-N was supplied,but plant height of rice seedling wasn’t affected by NO-3-N supply.However,under water stress all tested growth indexes of rice seedlings,including biomass,plant height,root length,root diameter,root volume,root surface area,and number of root tips,decreased with the increase of NO-3-N supply.Conclusion] Water stress can affect the response of rice seedling growth to NO-3-N supply and reduce N uptake rate in rice plant. |
| |
| Keywords: | Rice Water stress NO-3-N Uptake rate |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
