不同秧龄对机插晚稻生长发育及产量的影响

为探讨浏阳地区机插秧高产晚稻的最适秧龄,选用湘晚籼12号和盛泰优9712两个品种进行弹性秧龄试验。结果表明:湘晚籼12号秧龄33 d的千粒重、理论产量、实际产量均高于其他播期处理,但其秧苗素质、分蘖能力等表现出规律不明显或跳动的特征,需进一步研究;而盛泰优7912秧龄21 d的返青期最短,结实率、千粒重、理论产量、实际产量均优于其他播期处理,表明盛泰优7912以秧龄21 d最为适宜,可进一步试验验证或在生产过程中推广应用。

Effect of Different Seeding Age on Growth and Yield of The Mechanical Transplanting Late Rice

A test of seedling lfexibility was carried out with two rice varieties (Xiangwanshan12 and Shengtaiyou9712) as our research materials. The results showed that in Xiangwanshan12, the seed setting rate was highest which was 88.0% in the treatment of which the seedling age for machine-transplanted was 25 days, and the treatment of which the seedling age for machine-transplanted was 33 days showed the heaviest thousand-grain weight which was 26.2 g as well as the highest yields. In Shengtaiyou9712, the treatment of which the seedling age for machine-transplanted was 21 days showed a higher seed setting rate, heavier thousand-grain weight and a higher yields than any other treatments. And the relationship between growth characteristics and yield in rice was discussed in this paper.