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试验以超级稻品种松粳9号和常规稻品种松粳6号为试验材料,研究了寒地粳稻不同群体条件下干物质积累规律,探讨了插秧密度对干物质积累以及产量形成的影响。结果表明:在一定的插秧密度范围内,松粳6号和松粳9号群体干物重、茎鞘物质输出率和茎鞘物质运转率随密度的增加而增加,但是,当群体密度过大时反而降低。收获指数与抽穗期的稻穗干重和成熟期的整体干重呈显著正相关,与成熟期的稻穗干重呈极显著正相关;茎鞘物质输出率与成熟期稻草干重和稻穗干重呈显著正相关,与成熟期整株干重呈极显著正相关;茎鞘物质运转率与成熟期稻穗干重和整株干重分别呈显著和极显著正相关。在黑龙江省第一积温带地区,松粳6号和超级稻松粳9号的最适插秧密度分别为30cm×13.3cm和30cm×16.7cm。
In this study, the super rice variety Songjing 9 and the conventional rice variety Songjing 6 were used as experimental materials to study the accumulation of dry matter in different groups of winter japonica rice and the effect of planting density on dry matter accumulation and yield formation. The results showed that the dry matter weight, the output of stem and sheath, and the material utilization rate of stems and sheaths of Songjing 6 and Songjing 9 increased with the increasing of density, but when the population density was too large But lower. There was a significant positive correlation between the harvest index and the whole dry weight at heading and maturity of heading and the grain weight at maturity. There was a significant positive correlation between the harvest index and the dry weight of heading date and the dry weight of rice at maturity There was a significant and significant positive correlation between dry matter weight and dry weight of whole plant at maturity. There was a significant and significant positive correlation between dry matter weight and dry weight of whole plant at maturity. In the first accumulated temperate zone of Heilongjiang Province, the optimal transplanting density of Songjing 6 and super-grain Songjing 9 were 30cm × 13.3cm and 30cm × 16.7cm respectively.