【摘要】 以水稻为研究对象,对同1天收割的成熟水稻,从收割后第1天开始,每天取样考种,分析考查结实率、秕谷率、空壳率、千粒重等结实性状,连续考种10 d,研究不同考种时间所引起的结实性状的差异及其与考种时间的关系。结果表明,随着考种时间的推后,结实率呈下降趋势,秕谷率呈上升趋势,千粒重呈降低趋势,空壳率与考种时间的相关性不明显;收割后3 d内考种,结实率、秕谷率、千粒重差异不显著,从第4天开始,结实率显著下降,秕谷率显著增加,千粒重下降明显。基于水稻结实性状与考种时间的关系,建议水稻等禾谷类作物的结实性状分析,在收割后3 d内完成,避免因此引起的差异导致相关分析结论的偏差。更多还原

【Abstract】 With super hybrid rice cultivar Y Liangyou 1 as the experimental material,seed-setting rate,abortive grain rate,empty grain rate and 1 000-seed weight were investigated for continuous 10 days since the first day post-harvest to reveal the correlation between differences in seed-setting characters of rice and seed investigation time.The results indicated that seed-setting rate,abortive grain rate,empty grain rate and 1 000-seed weight varied at different seed investigation time.With the postponement of seed investigation,seed-setting rate and 1 000-seed weight showed downward trends,abortive grain rate showed an upward trend,while empty grain rate exhibited a significant correlation with seed investigation time.Seed-setting rate,abortive grain rate and 1 000-seed weight exhibited no significant differences within the first three days after the harvest;since day 4,seed-setting rate and1000-seed weight declined remarkably,while abortive grain rate increased significantly.Based on the correlation between seed-setting characters of rice and seed investigation time,the analysis of seed-setting characters of rice and other cereal crops should be completed within the first three days after the harvest,thereby improving the accuracy of relative conclusion.更多还原