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池塘对比试验(1987—1989)和室内补充试验结果证明了“一草养三鲢”的常规混养法不能充分发挥高产池中草鱼和鲢鳙鱼种间的协调互利作用,使池塘能量转换效率偏低,这主要由于鲢鳙鱼密度太大,饵料不足,需经常过量施肥,易造成水质恶化,诱使草鱼体弱多病诱致。依草鱼摄食后所排粪量的供饵能力和作用于滤食性鱼的主要能流途径,将草鱼与滤食性鱼种放养重量调整为1.5—2.5:1,以青料为主,适当配喂颗粒饲料,其主体鱼的种群生长率、池塘能量转换效率均明显高于常规饲养法。池塘内不增施外源肥料,青、精饲料输入量保持与草鱼生物学特性相适应的情况下,每生产单位重量的草鱼,可带动生产40—80％重量的鲢鳙。
Pond comparison test (1987-1989) and indoor supplementary test results show that “one grass three silver carp,” the conventional polyculture method can not give full play to the high-yielding pool of grass carp and silver carp and bighead carp species interaction and mutual benefit, the pond energy conversion efficiency Low, which is mainly due to silver carp and bighead carp density is too low, insufficient feed, often excessive fertilization, easily lead to deterioration of water quality, induce grass-carp infirm result. Grass carp and filter-feeding fish stocking weights were adjusted to 1.5-2.5: 1 according to the feeding capacity of the grass carp after feeding and the main energy flow path acting on the filter-feeding fish. Pellet feed, the population growth rate of its main fish, pond energy conversion efficiency were significantly higher than the conventional feeding method. The pond does not increase exogenous fertilizer, green and refined feed input to keep consistent with the biological characteristics of grass carp, per unit weight of grass carp, can drive the production of 40-80% by weight of silver and bighead carp.