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第一,关于密度和病虫害问题。 甜菜捉苗、保苗比较困难,容易出现缺苗断垅现象,加之一些农户留苗较稀,致使单位面积产量上不去,同时也影响甜菜品质。甜菜适宜的密度是每亩6000株左右。在这样条件下每个块根平均重0.5公斤,一亩地收获3吨,含糖率也较高。苗期病虫害是造成缺苗的另一原因,应该通过拌种(或采用包衣种子)、
First, on the issue of density and pests and diseases. Beetle seedlings, seedlings more difficult, prone to lack of seedlings broken phenomenon, coupled with some farmers leaving thinner seedlings, resulting in yield per unit area, but also affect the quality of sugar beet. The suitable density of sugar beet is about 6000 plants per acre. Under such conditions, the average weight of each root is 0.5 kg, and 3 tons are harvested per mu. The sugar content is also higher. Seedling pests and diseases is caused by another reason for lack of seedlings, should be dressing (or coated seeds),