我县于一九七九年三月从浙江引进细绿萍,在九个公社二十个大队放养。深受群众好评。其特点是繁殖快、产量高、肥效高。在春季,这种萍的繁殖速度要比本地种快一倍,亩产萍量可达九千至一万千。比本地种高一至二倍。早稻养萍压青作分蘖肥,亩产比无养萍的增产一成左右。细绿萍虽然具有本地萍种所没有的优良特性,但不耐高温,越夏困难。为攻破越夏这一关,我们组织力量,在海口公社岭兜果林场,从我县不同自然条件出发,进行不同越夏场所、不同的方法对比试验。经过三个多月的对比观察和精细管理,除池塘养萍因萍丝虫严重,防治困难,难于越夏外,其余六种越夏办法都获得 My county introduced Fine Green Ping from Zhejiang in March 1979 and stocked 20 battalions in nine communes. Well received by the masses. It is characterized by rapid propagation, high yield, high efficiency. In the spring, the breeding of this kind of duck is twice as fast as that of the local species, with a yield of 9,000 to 10,000. One to two times higher than the native species. Early rice pressure Ping Qing green tillering fertilizer, mu yield than non-raising Ping 10% increase. Although fine green Lupin does not have the local characteristics of good species, but not heat, summer more difficult. In order to break through this summer, we organized forces in the Pudao fruit farm in the mouth of the commune of Haikou and set off from different natural conditions in our county to carry out comparative experiments on different places for different places. After more than three months of comparative observation and fine management, in addition to ponds due to Ping Ping filariasis, prevention difficulties, the more difficult summer, the rest of the six summer approaches are obtained