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《Journal of Northeast Agricultural University》 2015-09
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Nitrogen accumulation and translocation characteristics of direct-seeded rice in cold area

LUO Shengguo;ZHOU Ting;YIN Yulong;WANG Huan;ZHAO Guangxin;WANG Lijuan;School of Resources and Environmental Sciences, Northeast Agricultural University;  
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-seeded 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%(P0.01) and 160.1%(P0.01)higher than that of transplanted rice, and N assimilation contribution rates were 133.3%(P0.01) and177.8%(P0.01) 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.
【Fund】: 科技部“十二五”科技支撑项目(2013BAD20B04)
【CateGory Index】: S511
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