麸皮生物絮团技术在鲢鲤鱼混养鱼塘中的应用

Application of wheat bran flocculation technology on mixed culture fish pond of silver carp and carps

在鲢鲤鱼混养鱼塘内进行增饲麸皮碳源的试验研究,探讨麸皮在常规养殖鱼塘生成生物絮团的效果及对鱼类生长和养殖水体水质的影响。结果显示:增饲麸皮可以显著促进鱼塘生物絮团的生长;与对照鱼塘相比,增饲麸皮的鱼塘鲜鱼产量提高16.32%,其增重率、特定生长率、生长势显著高于对照鱼塘;鲢鱼的生长性能高于鲤鱼,鲤鱼的饲料系数低于对照鱼塘,生物絮团对鲢鱼的促生长作用高于鲤鱼;与对照鱼塘相比,增饲麸皮的鱼塘水体透明度降低、总悬浮物(TSS)浓度上升,NO2-N、NH3-N、TN浓度显著降低,养殖水体部分水质指标得到改善。

An experiment on the carbon source from supplementary wheat bran was carried out in the mixed ponds of silver carp and carps,in order to study the effect of wheat bran on the bioflocculation generation in the ponds under conventional culture and its influence on the fish growth and the aquaculture water quality.The results showed that supplementary wheat bran could significantly promote biological flocculation,with the fresh fish yield increased by 16.32%compared with the control fish ponds.The weight gain rate,specific growth rate and growth potential of the experimental fish ponds were significantly higher than those of the control ponds.The growth performance of silver carp was higher than that of carp,and the feed coefficient of carp was lower than that of the control fish ponds.The effect of bioflocculation on the growth of silver carp was higher than that of carp.Compared with the control fish ponds,the water transparency of the fish ponds with supplementary wheat bran decreased,the total suspended solid concentration increased,the concentration of nitrite nitrogen,amino nitrogen and total nitrogen significantly decreased,and the water quality of the aquatic water was improved.