欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

不同生态稻区覆膜旱作稻氮营养生理及抗逆生理特性探讨

路兴花1;吴良欢1;郑寨生2;孔向军2;张福锁3   

  1. 1浙江大学环境与资源学院环境修复与生态健康教育部重点实验室,杭州310029;2浙江省金华市农业科学研究所,金华 321000;3中国农业大学资源与环境学院,北京 100094

  • 收稿日期:2003-12-11 修回日期:2004-10-18 出版日期:2005-02-18

Physiological characteristics of nitrogen nutrition and stress-resistance of film-mulched rice in various ecological regions of Zhejiang Province

LU Xinghua1,WU Lianghuan1,ZHENG Zhaisheng2,KONG Xiangjun2,ZHANG Fusuo3   

  1. 1College of Environment and Resource Sciences,Zhejiang University, Hangzhou 310029,China;2Jinhua Municipal Institute of Agricultural Science,Zhejiang Province,Jinhua 321000,China;3China Agricultural University,Beijing 100094,China

  • Received:2003-12-11 Revised:2004-10-18 Online:2005-02-18

摘要: 不同生态稻区生态环境和栽培管理方式不同,覆膜旱作稻氮营养生理和抗逆生理与常规水作稻有些异同,尤其是体内NO3--N和NH4+-N含量及分布差异很大.杭嘉湖平原区覆膜旱作稻生长前期受干热天气影响,其分蘖期、拔节期、孕穗期体内NO3--N含量较水作稻有不同程度的降低,而NH4+-N含量则极显著提高;金衢盆地覆膜旱作稻孕穗期体内NO3--N含量比常规水作稻高,根部NH4+-N含量则显著降低,茎基部和叶片NH4+-N含量有一定增加.正常气候条件下两生态稻区覆膜旱作稻孕穗期叶片硝酸还原酶(NR)活性和谷氨酰胺合成酶(GS)活性较水作稻均有不同程度的提高;丙二醛(MDA)、可溶性糖及脯氨酸(Pro)含量与水作稻相差不大,表明不同生态稻区的覆膜旱作稻可以通过不同的栽培管理模式,促进生长发育,达到高产目的.

关键词: 水稻化感物质, 抑草作用机理, 数量性状, 分子辅助选择, 克隆

Abstract: The study showed that different ecological environment and cultivation system in various ecological regions of Zhejiang Province resulted in some different physiological characteristics of nitrogen nutrition and stressresistance,especially in theaspect of NO3--N and NH4+-N concentrations, between film-mulched and conventional flooded rice.Owing to the heat stress in Hangjiahu plain,the NO3--N concentration of film-mulched rice decreased to some extent,but NH4+-N concentration increased markedly at tillering,jointing and booting stages,compared to conventional flooded rice.In Jinqu basin,the NO3--N concentration of film-mulched rice at booting stage was higher,while the NH4+-N concentration in its roots was notably lower than those of conventional flooded rice,with NH4+-N concentration in its basal stems and leaves somewhat increased.Generally,the glutamine synthetase(GS) and nitrate reductase (NR) activities in film-mulched rice leaves were enhanced at booting stage,while malondiadehyde (MDA),soluble sugar (SS) and proline(Pro) concentrations had little changes.In conclusion,film-mulched cultivation was beneficial to the rice growth and its high yielding.

Key words: Rice allelochemicals, Mechanisms of weed suppression, Quantitative trait, Marker assisted selection, Cloning