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我县推广放养细绿萍的关键是如何越冬问题。细绿萍越冬的最适温度是5℃,最低温度是-3℃,但不能超过3天。而本地常年最低气温是-17.2℃,细绿萍不易越冬。为了使细绿萍能在我县安全越冬,我们搞了三种试验:(1)建立简易塑料越冬棚;(2)地下土温沟越冬;(3)利用菜窖养萍越冬。这三种方法均收到较好的效果,细绿萍越冬成活率均在85—95%以上。现分述如下:
My county to promote stocking fine green Ping how the problem of overwintering. Green Luping optimum temperature of winter is 5 ℃, the minimum temperature is -3 ℃, but not more than 3 days. The local perennial minimum temperature is -17.2 ℃, fine green Ping is not easy to wintering. In order to make fine green Ping in our county safe wintering, we conducted three kinds of experiments: (1) the establishment of simple plastic winter shed; (2) underground soil temperature ditch wintering; (3) the use of cellar Pingping wintering. These three methods have received good results, the survival rate of fine Green Ping are more than 85-95%. Now as follows: