寒地直播稻氮素积累与转运特征  

Nitrogen accumulation and translocation characteristics of direct-seeded rice in cold area

作　　者：罗盛国[1] 周婷[1] 尹宇龙 王欢[1] 赵广欣 王丽娟[1] 

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《东北农业大学学报》2015年第9期16-22,共7页Journal of Northeast Agricultural University

基　　金：科技部"十二五"科技支撑项目(2013BAD20B04)

摘　　要：采用稻花香2号为试验材料进行田间试验,研究寒地直播稻与移栽稻氮素积累、转运及产量差异。结果表明,在抽穗期施入粒肥能够提高直播稻生育后期叶片含氮量和氮积累量,增强光合生产能力。抽穗后,起垄直播稻和免耕直播稻氮同化量比移栽稻高139.9%(P<0.01)和160.1%(P<0.01),氮同化贡献率比移栽稻高133.3%(P<0.01)和177.8%(P<0.01)。直播稻生育后期仍能进行氮积累,抽穗后30 d至成熟期起垄直播稻和免耕直播稻氮素积累量分别为2.17和3.81 kg·hm-2,而移栽稻在抽穗后30 d至成熟期无氮积累。直播稻和移栽稻产量差异不显著。The paper was conducted using Daohuaxiang2 as tested rice variety to study the difference in N accumulation, translocation and yield between direct-seeded and transplanted rice in cold area. Results showed that top dressing N fertilizer at heading stage improved N content and N accumulation of direct-seed- ed rice at late growth stage and enhanced photosynthetic production capacity. After heading, N assimilation of ridge direct-seeded rice and no-tillage direct-seeded rice were 139.9% （P〈0.01） and 160.1% （P〈0.01） higher than that of transplanted rice, and N assimilation contribution rates were 133.3% （P〈0.01） and 177.8% （P〈0.01） higher than that of transplanted rice. N accumulation was still proceeding at the late stage of direct-seeded rice, from 30-day after heading to maturity, the N accumulation of ridge direct-seeded rice and no tillage direct-seeded rice were 2.17 and 3.81 kg-hm^2, respectively, but no N accumulation with transplanted rice. There was no significant difference in yield between direct-seeded rice and transplanted rice.

关 键 词：寒地 直播 水稻 氮积累 氮转运 

分 类 号：S511[农业科学—作物学]