不少农民朋友在外地打工经商时带回良种,有些通过邮购或直接购买外地的品种,认为既然在外地产量高,引到本地也会增产。事实上并非完全如此。有些不但不增产,反而严重减产。购买外地粮油作物良种时要注意以下方面。不同纬度。品种原产地与引入地纬度不同,光照条件和温度条件相差 Many peasant friends bring back fine varieties while working in the field, and some directly purchase varieties from other places through mail order or overseas purchase. They think that since they have a high output in the field, they will also lead to an increase in production. In fact it is not exactly the case. Some will not only increase production but will seriously reduce production. Pay attention to the following aspects when buying field grain and oil crops. Different latitudes Varieties of origin and the introduction of latitude is different, light conditions and temperature conditions differ