CAJ | 학술논문

以穗重型水稻品种东农425和穗数型水稻品种东农427为试验材料，运用Richards方程进行拟合，研究插秧密度对两种不同穗型水稻品种灌浆特性的影响。结果表明，在一定插秧密度范围内，两个水稻品种的强势粒灌浆速率（GRmax、GRmean）和籽粒充实度均随着密度的降低而升高，但当群体密度过低时下降；而弱势粒则表现为始终随着密度的降低而升高，插秧密度降低能显著提高弱势粒的灌浆速率（GRmax、GRmean），使两品种强弱势粒灌浆速率趋于同步。千粒重和结实率与水稻强、弱势粒灌浆速率呈显著或极显著正相关。插秧密度增大，使单位面积有效穗数增加，但高密度降低穗数型水稻品种东农427的灌浆速率、千粒重和结实率，抑制产量增加；低密度下东农425灌浆速率增加，千粒重、结实率均升高，有效穗数降低严重抑制穗重型水稻品种东农425产量增加。
이수중형수도품충동농425화수수형수도품충동농427위시험재료，운용Richards방정진행의합，연구삽앙밀도대량충불동수형수도품충관장특성적영향。결과표명，재일정삽앙밀도범위내，량개수도품충적강세립관장속솔（GRmax、GRmean）화자립충실도균수착밀도적강저이승고，단당군체밀도과저시하강；이약세립칙표현위시종수착밀도적강저이승고，삽앙밀도강저능현저제고약세립적관장속솔（GRmax、GRmean），사량품충강약세립관장속솔추우동보。천립중화결실솔여수도강、약세립관장속솔정현저혹겁현저정상관。삽앙밀도증대，사단위면적유효수수증가，단고밀도강저수수형수도품충동농427적관장속솔、천립중화결실솔，억제산량증가；저밀도하동농425관장속솔증가，천립중、결실솔균승고，유효수수강저엄중억제수중형수도품충동농425산량증가。
The paper study the effects of transplanting density on grain-fil ing characters on two rice varieties with different types of panicles, the grain-fil ing processes of Dongnong425 (rice panicle weight type) and Dongnong427 (rice panicle number type) were studied with Richards equation in this study. The results showed that in a certain range of transplanting density, the maximum grain-fil ing rate (GRmax), mean grain-fil ing rate (GRmean) and grain ful ness of superior grains of the two rice varieties were increased with the density reduced;However, they were actual y decreased when the density was too low. While inferior grains were always increased with the density reduced, the reducing of density greatly increased the GRmax and GRmean of inferior grains, making the superior and inferior grains of two rice varieties tend to be synchronous grouting. 1000-grain weight and seed-setting rate was significantly or very significantly positively correlated with GRmax and GRmean of superior and inferior grains. With the increasing of transplanting density, effective panicles increased, but the yield of Dongnong427 was reduced with high transplanting density as the reduction of GRmax, GRmean, 1 000-grain weight and seed-setting rate; while the GRmax, GRmean, 1 000-grain weight and seed-setting rate of Dongnong425 were increased under low transplanting density, the yield of Dongnong425 was reduced as the reduction of effective panicles.