论文部分内容阅读
1.分级催芽播种,提高种子利用率杂交水稻种子,由于异交结实,颖壳闭合不严,容易吸湿回潮,影响发芽率。为此,在播种前要抢晴天晒种,降低种子含水量,提高酶的活性,加快浸种时的吸水速度,减少浸种时间,有利催芽,防止现糖和烧芽,促使齐芽、壮芽,提高发芽率。分级催芽播种。将杂交种子倒入盛好一定数量的清水容器中,然后充分搅拌,把浮在上面的青谷和半饱谷捞出来,分开浸种、催芽。由于青谷和半饱谷发芽较迟较慢,就必须适当延长催芽时间,促使发芽均匀一致,待芽长出半粒谷子左右时进行播种。播种后,采用较疏松的覆盖物覆盖,覆盖物不宜过厚,以种子不露出为宜。并要加强管理,精心培育,使秧苗整齐茁壮。
1. Grading germination sowing, improve seed utilization Hybrid rice seeds, due to outcrossing, glume closure is not strict, easy moisture moisture regain, affect the germination rate. To this end, before seeding to seize sunny sun species, reduce seed moisture content, improve enzyme activity, speed up soaking the water absorption rate, reduce seed soaking time, favorable germination, to prevent the current sugar and burning buds, promote Qi buds, strong buds, Improve germination rate. Grading germination sowing. The hybrid seed into a good number of containers filled with water, and then stir, the floating in the above green and half-full grain fish out, soaking separately, germination. As the green valley and half-full valley late rather slow germination, it must be appropriate to extend the germination time to promote uniform budding until the buds grow about half a grain of millet when sowing. After sowing, covering with a more loose covering, covering should not be too thick, the seeds do not emerge appropriate. And to strengthen management, carefully nurtured, so that seedlings neat and thriving.