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1.选地隔离为获得高粱制种高产,应选用向阳、中上等肥力、前茬为豆类或玉米的地块,并且排灌方便,旱涝保收,便于管理,便于防止病虫鸟兽之害。亲本不育系只有在异株授粉的情况下才能结实。配制杂交种如果隔离区不够,就会授上其它高粱的花粉,使种子变杂。因此,制种田的隔离,是保证制种纯度的关键措施,一般应在300米以上。在有树林、山岗等天然屏障隔离的情况下,可酌情缩减距离。
1. Selection of isolation In order to obtain high yield of sorghum seed production, should choose sunny, middle and upper fertility, the former crop of beans or corn plots, and drainage and irrigation convenience, drought and salvo income, easy to manage, easy to prevent pests and diseases. Parental lines are robust only when they are pollinated. Preparation of hybrids If the isolation zone is not enough, other sorghum pollens will be given to make the seeds extraneous. Therefore, the system of farming isolation, is to ensure the purity of seed production measures, generally should be 300 meters above. In the woods, hills and other natural barriers isolated circumstances, may, as appropriate, reduce the distance.