油菜收获期快到了,做好油菜选种留种和收割脱粒工作,是提高产量和品质,争取丰收的最后一环,也为来年油菜增产打下良好基础。过去多认为油菜是附带庄稼,很少注意油菜的选种工作,使农村中的优良品种,未能发掘出来,甚至已推广的良种也引起了退化现象。例如目前各地所推广的胜利油菜良种,由于长期未予重视选种留种工作,在自然异花授粉的情况下,目前已相当混杂。据四川省三台县农 Rape harvest is approaching, do rapeseed seeding and harvesting threshing work, is to improve production and quality, for harvest the last part, but also for the coming year to lay a good rapeseed basis. In the past, many considered rape as an incidental crop, paying little attention to the selection of rapeseed so that the fine varieties in rural areas could not be unearthed. Even the promoted varieties have caused degeneration. For example, the current promotion of rapeseed varieties throughout the country, due to the long-term lack of attention to the selection of seed work in the case of natural cross-pollination, has been quite mixed. According to Santai County in Sichuan Province