严格选地坚持隔离条件在一个大队或生产队,相对集中制种比分散的队队制种有利于选地和隔离。应选择平肥的旱涝保收的地块做制种田.地力均匀一致,有利于分期播种、按时出苗,达到花期全遇的目的。“云彩地”必然出现“云彩苗”,容易造成授粉不全。迎茬往往产生小老苗,直接造成减产, Strictly choose to adhere to the isolation conditions in a brigade or production team, the relative concentration of seed production than the scattered system is conducive to selection and isolation. Should choose a flat paddy Drought and salvage of the land system of farming system. Uniform soil fertility, is conducive to sowing, timely emergence, to achieve full flowering purposes. “Cloud” is bound to appear “cloud seedlings,” likely to cause pollination. Yingzha often produce small seedlings, a direct result of cut,