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以杂交稻泰优390和隆晶优1212为材料,开展大田试验,在不同秧龄(15、20、25和30 d)下对单本密植机插和常规机插杂交晚稻的分蘖动态、干物质积累、产量及产量构成进行了比较。结果表明,在各秧龄下,单本机插的处理分蘖数均少于常规机插,但成穗率、每穗粒数和二次枝梗比常规机插平均高18.36%、21.00%和26.92%;单本机插分蘖中期的干物质积累量低于常规机插,但齐穗期和成熟期的干物质积累量要高于常规机插;单本机插分蘖中期、齐穗期和成熟期的单茎干物质量分别比常规机插高0.02 g、0.11 g和0.37 g;单本机插在15、20、25和30 d秧龄下的产量分别较常规机插高10.08%、11.08%、18.64%和20.07%。由此可见,杂交晚稻采用单本密植机插,有利于控制无效分蘖,形成个体优势,增加二次枝梗数,扩大库容量,提高齐穗后群体干物质量,进而获得高产。
The hybrid rice, Tayou 390 and Longjingyou 1212, were used to carry out field experiments. The tillering dynamics, the tillering dynamics and the dry weight of late rice with single close planting and conventional rice planting under different seedling ages (15, 20, 25 and 30 d) Accumulation, production and yield composition were compared. The results showed that the number of tillers per plant was less than that of the conventional ones at all seedling ages, but the average number of spikelets, grains per spike and secondary branches were 18.36%, 21.00% and 26.92 higher than that of the conventional ones %. The dry matter accumulation at the mid-tillering stage was lower than that of the conventional one, but the dry matter accumulation at full heading stage and maturity stage was higher than that of the conventional one. The tillering stage and mature stage Compared with the conventional machine, the single stem dry matter mass was 0.02 g, 0.11 g and 0.37 g, respectively. The yield of single native stem at the ages of 15, 20, 25 and 30 d was 10.08% and 11.08% 18.64% and 20.07%. Thus, the use of a single close planting late hybrid rice inserted, is conducive to controlling the ineffective tiller, the formation of individual advantages, increase the number of secondary branches, expand the library capacity, increase the amount of dry matter after heading, and then get high yield.