CAJ | 학술논문

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.
채용도화향2호위시험재료진행전간시험,연구한지직파도여이재도담소적루、전운급산량차이.결과표명,재추수기시입립비능구제고직파도생육후기협편함담량화담적루량,증강광합생산능력.추수후,기롱직파도화면경직파도담동화량비이재도고139.9%(P<0.01)화160.1%(P<0.01),담동화공헌솔비이재도고133.3%(P<0.01)화177.8%(P<0.01).직파도생육후기잉능진행담적루,추수후30 d지성숙기기롱직파도화면경직파도담소적루량분별위2.17화3.81 kg·hm-2,이이재도재추수후30 d지성숙기무담적루.직파도화이재도산량차이불현저.
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-til age 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 stil 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 til age direct-seeded rice were 2.17 and 3.81 kg·hm-2, respectively, but no N accumulation with trans-planted rice. There was no significant difference in yield between direct-seeded rice and transplanted rice.