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1选地与播种1.1选地选择有隔离条件的近4年内没有种植过向日葵的土地,杜绝重茬、迎茬和豆茬。土壤质地要求,肥力均匀,排灌条件良好,便于管理,且不易遭人、畜危害的地块。要有比较完善的农业基础设施,排灌方便,做到旱涝保收。不选择近两年使用过含莠去津成分的杀双子叶杂草的除草剂地块。1.2播种
1 Land Selection and Seeding 1.1 Choose the land that has not been planted with sunflower in the past 4 years with the isolation condition, and to prevent the continuous cropping, the stubble and the stubble. Soil texture requirements, fertility, irrigation and drainage conditions are good, easy to manage, and not easy to be human, livestock endangered plots. To have a more complete agricultural infrastructure, irrigation and drainage facilities to do Dalao received. Herbicide plots that kill dicotyledonous weeds that contain atrazine components for the last two years are not selected. 1.2 Seeding