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1选择地块选择自然隔离条件好,交通运输方便,土壤肥力高,排灌方便,群众制种积极性高,科技意识强的农场、土地流转承包户或乡村连片种植户进行制种。制种地要严格隔离其他玉米,避免外来花粉随气流传播,影响种子纯度。2种植密度鲁单818种植密度为行距0.70m,株距0.20m,父母本行比1:5(种植密度和父母本行比可根据制种地区的实际情况进行调整)。3科学施肥
1 Select plots to choose the natural isolation conditions are good, convenient transportation, high soil fertility, irrigation and drainage convenience, mass production of high enthusiasm, science and technology awareness of the farms, land transfer contract households or rural conti nursery seed production. Seed production to strictly isolate other corn, to avoid the spread of foreign pollen flow, affecting the purity of the seed. 2 Planting Density The planting density of Ludan 818 was 0.70m in row spacing and 0.20m in plant spacing. The parents ’ratio was 1: 5 (the planting density and parents’ ratio could be adjusted according to the actual conditions of the seed production area). 3 scientific fertilization