论文部分内容阅读
天津市东郊区万辛庄乡水产畜牧场现有养殖水面400亩,其中养成鱼水面260亩,鱼种池140亩,养周转鸡10000只,其中蛋鸡5000只,年产鸡粪250000公斤,现有职工53人,其中养鱼人员33人(成鱼养殖10人);年总产值120万元,其中鱼产值80万元左右。该场成鱼养殖始于1978年,在1985年前养殖周期为2年,每年不清坑,鱼年产量在80000公斤左右。从1986年起,养殖周期缩短为一年,实行一年一清坑。当年鱼产量为90000公斤。1987年为115000公斤,1988年为137500公斤(我站进行技术指导)。1989
The existing aquaculture water area of 400 mu in aquatic livestock farms of Wanxinzhuang Township in the eastern outskirts of Tianjin, of which 260 mus of aquatic fish and 140 hectares of aquaculture ponds, 10,000 hens are for delivery, of which there are 5000 laying hens with an annual output of 250,000 kg of chicken manure , 53 employees, of which 33 fish workers (adult fish breeding 10); annual output value of 1.2 million yuan, of which fish production value of 800,000 yuan. The farm started fish farming in 1978, before 1985 the breeding cycle of 2 years, not clear pit every year, fish production in about 80000 kilograms. Since 1986, the breeding cycle has been shortened to one year, implementing a clear pit of one year. The year’s fish production was 90,000 kilograms. 115,000 kg in 1987 and 137,500 kg in 1988 (technical support for my station). 1989