选种留种 油菜是异花授粉作物。在大田栽培中往往因蜜蜂或其他昆虫串粉,造成生物学混杂;在播种、收割、脱粒、贮藏和运输一系列农事活动中易造成机械混杂。混杂后种子纯度降低,种性退化,影响产量。因此,必须十分重视保纯和选种工作。 选种方法可采取株选与主轴选相结合,即在油菜开花后,从大田中选择一批具有本品种特征特性,长势长相一致,健壮无病,分枝多,结果层密而多的优良单株,用布条做好标记,到成熟收割时再重复选一次,去 Seed selection rapeseed is cross-pollination crops. In field cultivation, the bees or other insects are often powder mixed, resulting in the biological mixture; in the sowing, harvesting, threshing, storage and transportation of a series of agricultural activities easily lead to mechanical confounding. Mixed seed purity decreased, species degeneration, affecting the yield. Therefore, we must attach great importance to purity and selection work. Seed selection methods can be selected with the election spindle and the spindle, that is, after the flowering rapeseed, from the field to select a number of the characteristics of this species characteristics, consistent growth, robust and disease-free, multi-branch, the results of more dense layers Single plant, marked with a strip of cloth, and then repeat the election to a mature harvest, go