【摘要】 以六个品种为试材,通过分期播种试验,研究了播期对不同品种的产量及产量构成因素的影响。结果表明,播期间产量差异显著,播期推迟,多数品种的产量下降。另外,每穗秕粒数、每穴成粒重的播期间差异达极显著水平,每穗秕粒数的品种播期互作效应显著,因而要选择适宜的品种和播期。六个品种中,沈农315、辽粳454在4月23日播种,6月2日移栽,适于当地种植,产量较高。更多还原

【Abstract】 Using 6 rice varieties as treat materials, three sowing-dates were performed and the effects of sowing-date on yield and yield component of rice plants were analyzed. The result indicated that there was a significant difference of the yield between sowing-dates. If the sowing-dates were delayed, the grain yields for many varieties would decline. Moreover, there was a very significant difference of the number of shrivels per panicle, or the weight of ripened grains per hill. When varieties Shennong 315 and Liaojing 454 were sowed on Apr 23 and transplanted on Jun 2, grain yields of them could be as high as usual.更多还原