摘要
设60000、75000、90000和105000 ind/hm24个密度,研究了不同放养密度对克氏原螯虾生长和养殖水质的影响,周期为50 d,每月测定1次水质指标。实验结束后,每组随机选取60尾虾,测定各项生长性能指标。结果显示,随着放养密度增大,克氏原螯虾终末体重、增重率、特定生长率、终末体长和体长增长率降低,而残肢率、饲料系数、产量和体长变异系数升高;水质指标(总氮、总磷、氨氮和亚硝酸盐氮)随放养密度增大而升高。结果表明,提高放养密度能在一定程度上增加产量,但高密度会抑制克氏原螯虾的生长并造成养殖水质恶化。
The effects of different stocking densities （60000, 75000, 90000, and 105000 individuals/hm^2） on the growth of Procambarus clarkii and aquaculture water quality were studied. This experiment lasted 50 days, and the water quality was tested once a month. After the finish of the experiment, 60 individuals of Procambarus clarkii in each treatment were selected randomly, and their growth performance indexes were measured. The resuhs indicated that： as stocking density increased, the final body weight4 weight gain rate, specific growth rate, final body length, and body - length growth rate of Procambarus clarkii decreased, while the percentage of limb loss, feed conversion ratio, yield, and variation coefficient of body length rose. The water quality inde- xes （total nitrogen, total phosphorus, ammonia nitrogen and nitrite nitrogen） went up along with the increase in stocking density. So increasing stocking density could raise the yield to a certain extent, but high stocking density could inhibit the growth of Procambarus clarkii and result in the deterioration of aquaculture water quality.
出处
《江西农业学报》
CAS
2014年第4期86-89,93,共5页
Acta Agriculturae Jiangxi
基金
国家公益性行业(农业)科研专项(201003070)
江苏省产学研前瞻性联合研究项目(BY2012045)
关键词
克氏原螯虾
密度
生长性能
水质
Procambarus clarkii
Density
Growth performance
Water quality
