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结合生产实际,探讨了普通鲩鱼向脆肉鲩转变的过程和实质,提出用“断裂应力δρ”作为脆肉鲩脆化程度的划分标准,并实验研究了不同水温、水流速度、水化学因子和蚕豆饲料投喂量等因素对脆肉鲩生长和品质的影响。结果表明,以脆肉鲩不同部位组织热变性蛋白质的断裂应力δρ为指标的脆化程度主要由蚕豆饲料摄食量所决定,脆肉鲩养殖的良好条件为:放养规格1.50~2.00 kg/尾,放养密度150~170尾/666.7 m2,,水温在18℃以上;摄食量达到3.962~5.263 kg/kgbw时,可实现饲料系数约为6,脆化程度指标δρ为0.422~0.611 kg/cm2的合格商品脆肉鲩。水体水化学因子等环境条件只对草鱼脆化起间接辅助作用,它们通过改变草鱼的摄食量和营养(能量)转化率,影响机体正常的生理活动而导致草鱼肌肉蛋白合成与积累不同等表达出来,良好的水环境质量利于脆肉鲩养殖。普通鲩鱼脆化养殖的最佳养殖条件为适当的饲料投喂剂量(4.3kg/kgbw),适宜的水环境因子条件(水温(30±2)℃、DO≥5mg/L、pH在5.8~6.2之间)。为进一步完善脆肉鲩养殖生产操作流程,提高脆肉鲩养殖技术,合理调控投饲量和养殖水环境因子,从而提高脆肉鲩品质和养殖效益进行了讨论。
According to the actual production, the process and essence of the transformation of common anchovy to crisp meat are discussed, and the “fracture stress δρ” is proposed as the criterion for the fragility of crispy meat. The effects of different water temperature, water velocity, water chemistry, Effects of Feeding Amount and Other Factors on the Growth and Quality of Crispus. The results showed that the degree of embrittlement indicated by the fracture stress δρ of heat-denatured protein in different parts of Brittle jellyfish was mainly determined by the feed intake of broad bean feed. The good conditions for the reproduction of Crispus crispus were as follows: stocking standard 1.50-2.00 kg / tail stocking density 150 ~ 170 tail /666.7 m2 ,, water temperature above 18 ℃; food intake reached 3.962 ~ 5.263 kg / kgbw, the feed coefficient can be achieved about 6, the degree of embrittlement index δρ 0.410 ~ 0.611 kg / cm2 of qualified commercial crisp meat. Environmental factors such as hydrochemical factors of water body play an indirect auxiliary role in grass carp embrittlement. They can be expressed differently by changing grass carp food intake and nutrition (energy) conversion rate and affecting the normal physiological activities of grass carp, resulting in the different synthesis and accumulation of muscle protein of grass carp Good quality of water environment is conducive to crisp meat breeding. The optimum culture conditions of ordinary catfish embalming culture were proper feedstuff dosage (4.3kg / kg bw), suitable water environment factor (water temperature 30 ± 2 ℃, DO≥5mg / L, pH 5.8 ~ 6.2 between). In order to further improve the operation process of breed crisp meat breeding, improve the breed technology of crispiness clam, rationally regulate the amount of feed and environmental factors of breed aquaculture, so as to improve the quality of crisp clam and breeding efficiency.