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秋植蔗是在生长前期过冬的。冬季低温霜冻的威胁不仅是在成熟期,更重要的是在秋植蔗的前期,它直接影响秋植蔗中后期的生长。因此是要认真对付的。一般在年平均气温低于20℃等温线的南温带蔗区,常年固然有短暂的霜冻威胁,即使在20℃以上的亚热带北缘蔗区,也会遇到数年一次的低温霜冻影响。这对于秋植蔗的增产和推广是不利的。往往由于低温霜冻致使甘蔗幼苗
Autumn sugarcane is in the early winter growth. The threat of cold frost in winter is not only at maturity, but more importantly in the early stages of autumn sugarcane, which directly affects the later growth of autumn sugarcane. Therefore, we must deal with it conscientiously. Generally, in the south temperate sugarcane zone with annual average temperature lower than 20 ℃, there is a short-term frost threat all the year round. Even in the subtropical sugar cane zone above 20 ℃, there will be several cold frosts once a year. This is not conducive to the production and promotion of autumn sugarcane. Sugar cane seedlings are often caused by frost frost