黑龙江省超级稻干物质积累及与产量性状的关系

Accumulation of dry matter of super rice varieties in Heilongjiang Province and correlation with yield traits

利用田间小区试验,对黑龙江省3个超级稻品种松粳9号、龙稻5号和龙粳14号及其相应对照品种进行干物质积累与产量关系的研究。结果表明,在各生育期超级稻品种的干物质积累量均高于普通对照品种,其中,分蘖盛期高14.2%～34.0%,拔节孕穗期高16.8%～37.9%,齐穗期高20.2%～35.6%,成熟期高15.1%～18.0%。相关分析结果表明,各生育期的总干物重与产量均呈显著或极显著正相关关系(r=0.85*～0.97**),孕穗期叶片、茎鞘干物重及总干物重与穗粒数和结实率两性状均呈显著正相关(r=0.76*～0.82*)。

Three super rice varieties Songjing9, Longdao5 and Longjing14 were studied in this experiment with methods of plot experiment, and three common varieties Tengxi138, Longdao3 and Hejiang19, which were CK of production test in Heilongjiang Province, respectively, were used as contrast. The results showed that the dry matter weight of super rice varieties were higher than contrasts at each stages, and the ratio was 14.2% to 34.0% at tiller stage, 16.8% to 37.9% at booting stage, 20.2% to 35.6% at full heading stage, 15.1% to 18.0% at ripening stage. The total weight of dry matter had significant positive correlation with yield （t=0.85＊-0.97＊） at each stages, and the dry matter weight of leaves, sheath and stem and total had significantly positive correlation with grains per panicle and seed setting rate （t=- 0.76＊-0.82＊）.