细绿萍(Azolla Filiculoides Lamk)是一种高产优质的水生绿肥和饲料,抗寒力强,起繁温度低,生长快,固氮能力强。1980年在丽江海拔2400米和2450米的两个坝子放养获得成功,二两萍种繁殖一年鲜萍总产三十多万斤,增殖一百五十万倍。高原坝区夏季无酷热,细绿萍很少因热害死亡,不需越夏保种。据1980年在丽江坝(海拔2400米)的测定:5—11月细绿萍的繁殖系数平均为0.0636,而7月和8月份的繁殖系数在全年最高,分别为0.0872和0.1012。相反,高原坝区冬季严寒,霜冻大,萍体容易死亡。研究细绿萍的越冬养殖 Azolla Filiculoides Lamk is a kind of aquatic green manure and feed with high yield and good quality. It has the characteristics of high cold resistance, low starting temperature, fast growth and strong nitrogen fixation ability. In 1980, the success of the two bazi stocking at 2,400 meters above sea level and 2,450 meters at Lijiang was successful. In the past year, two-to-one species of Pingzheng breed more than 300,000 kilograms of fresh leek and multiplied 1.5 million times. Plateau dam summer no heat, thin green Ping rarely died of heat damage, no summer preservation species. According to the determination of Lijiang dam in 1980 (2400 meters above sea level), the average reproductive coefficient of Sophora flavescens from May to November was 0.0636, while that of July and August was the highest throughout the year, reaching 0.0872 and 0.1012 respectively. In contrast, plateau dam winter cold, frost, Ping body easy to die. Study of green Pingping overwintering farming