池塘饲养鱼类优化结构及其增产原理Ⅳ．草鱼传染性疾病的系统防治
THE RATIONAL DESIGN OF POND FIDH CULTURE WITH REFERENCE TO THE PRINCIPLES OF YIELD INCREASE Ⅳ.SYSTEMATIC PREVENTION AND CURE OF INFECTIOUS DISEASES OF GRASS CARP.
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摘要: 1987-1989年池塘对比饲养试验和1988年的扩充试验结果表明,夏末至秋季投放鱼种,将“囤养”在不适环境中密集饲养的鱼种及早稀疏:免除鱼种并塘越冬,坚持在越冬期间投饵,消除人为停食而造成体重锐减的隐患,补充草鱼种越冬期代谢所需的能量,保持其健壮的体质:将常规的“一草养三鲢”调整为草鱼:鲢、鲸鱼=1.5-2.5∶1;采取青、精饲料合理搭配、“均匀递增”的投喂方法,不施肥,缩短饲养周期3年为两年等辅助措施,从“增强鱼体体质、优化鱼类生活环境”着手,建立新的防病技术体系,系统防治传染性鱼病,可使草鱼的平均成活率达到80%以上,显着地提高鱼产量和经济效益.Abstract: A two-year pond culture experiment was conducted during 1987 1989.Additional experiments were conducted in 1988.The results suggested that the grass carp fingerlings that have been densely cultured should be dispersed in late summer or early autumn.Feeding should be continued in winter in order to keep the fish in good conditions after winter.The traditional stocking ratio of one grass carp to three silver carp and bighead should be changed to 1.5 2.5∶1.Green feed and formulated diets should be administered in proper proportions,and no fertilization should be provided.The new technique in creased the yield and economic efficiency,with a survival rate of over 80%.
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