北京通县永乐店地区池塘养殖主要对象是草鱼， 1997年全区共有草鱼鱼种养殖池 1800余亩，养殖成活率为 30％～ 35％，有些池塘甚至全军覆没。针对这一实际情况， 1998～ 2000年我们在该地区开展了池塘草鱼鱼种当年亩产 2000公斤的高产试验，经过三年试验，取得了一龄草鱼种平均 Beijing Tongxian County Yongle District main area of ​​pond aquaculture grass carp, 1997 a total of more than 1,800 acres of grass carp fish breeding ponds, aquaculture survival rate of 30% to 35%, and some even annihilated the pond. In response to this fact, from 1998 to 2000, we conducted a high-yield trial of 2,000 kg per mu of pond grass carp fingerlings in the area. After three years of testing, we obtained the average of first-grade grass carp species