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 180 0余亩 ,养殖成活率仅为 30 %～ 35%。针对这一实际情况 ,1998～ 2 0 0 0年我们在该地区开展了池塘草鱼鱼种当年亩产 2 0 0 0公斤高产试验。经过 3年试验 ,我们取得了 1龄草鱼种平均亩产 2 175公斤 Beijing Tongxian County Yongle area pond aquaculture main target is grass carp, 1997 the region a total of more than 180 acres of grass carp fish breeding ponds, breeding survival rate of only 30% to 35%. In response to this actual situation, from 2000 to 2000, we conducted a high-yielding trial of 2000 kg per mu of pond grass carp fingerlings in the area. After three years of testing, we have obtained an average of 2 175 kg of first-class grass carp per mu