氮素处理对水稻浙粳22产量形成的影响及其生育后期与叶片光合特性间的关系  

Influence of Nitrogen Treatment on Yield and Its Relation to Leaf Photosynthesis Characteristics of Japonica Rice Variety Zhejing22 at Late Growing Stage

作　　者：陆艳婷[1] 张小明[1] 黄福灯[1] 叶胜海[1] 李春寿[1] 金庆生[1] 

机构地区：[1]浙江省农业科学院作物与核技术利用研究所,浙江杭州310021

出　　处：《核农学报》2013年第3期373-378,共6页Journal of Nuclear Agricultural Sciences

基　　金：浙江省核农学产业科技创新团队(2010R50033);农业部农业公益性行业科研专项(201103007);浙江省科技攻关0406项目

摘　　要：以晚粳稻浙粳22为材料,研究了低氮(N1)、中氮(N2)、高氮(N3)和不施氮肥(N0)4个不同施氮水平下,产量、稻株氮素利用率与叶绿素含量、光合速率等生理指标间的关系。结果表明,本试验条件下施氮水平越高,净光合速率越高,气孔导度和蒸腾速率相应增加,胞间CO2浓度有下降趋势。低氮及常规施氮水平下,稻株氮素利用率高,水稻产量与植株干物重、含氮量、光合速率等成正相关,高氮条件下则相关性不显著。The aim of this study was to investigate the relationship among the rice yield,rice plant nitrogen use efficiency and leaf SPAD values during different stages,photosynthetic rate and other physiological indexes using the japonica rice variety ＇Zhejing22＇ with the treatments of 4 nitrogen application levels.Results show that net photosynthetic rate（Pn）,stomatal conductance（Gs） and transpiration rate（Tr） were raised with the increasing of nitrogen application.The intercellular CO2 concentration（Ci） declined as the increaseing of nitrogen application.Meanwhile,under low and regular nitrogen levels,efficiency of rice plant nitrogen use is high and positive correlations were observed among the rice yield and plant dry matter,nitrogen content,photosynthetic rate.In addition,no remarkable correlation was found under high nitrogen level.

关 键 词：水稻 氮素利用率 光合特性 产量 

分 类 号：S511.22[农业科学—作物学]