The invention discloses a breeding method for purifying lake and
reservoir water quality by means of fishes, shrimps, clams and grass. According to the method, a lake and
reservoir water quality purification ecological breeding region is established, and a three-dimensional breeding mode is formed by fully utilizing the fishes, shrimps, clams and grass at the upper layer, the middle layer, the lower layer and the bottom layer of the breeding region. The lake and
reservoir water quality purification ecological breeding region is arranged at a lake and reservoir outlet, eutrophic
lake water, obtained after
aquaculture, of other regions of the lake and reservoir can flow to the lake and reservoir
water quality purification ecological breeding region conveniently, and the lake and reservoir
water quality purification ecological breeding region serves as the main feed source and plays the role of purifying the
water quality. According to the method, only one feed is used, the use ratio of the feed is high,
discharge of
nitrogen,
phosphorus and the like is low, and
water environment protection is promoted. In addition, excreta of the fishes, shrimps and clams who take food is used for growth of
hydrilla verticillata which provides natural fish nests for parents of yellow catfishes, freshwater shrimps and
corbicula fluminea, and the natural fish nests are used for adhesion and incubation of zygotes of the fishes, shrimps and clams; meanwhile,
hydrilla verticillata plays the role of improving the bottom environment of the breeding region, cyclic utilization of the fishes, shrimps, clams and grass in the lake and reservoir water quality purification ecological breeding region is formed,
fishery development is achieved, and
water environment protection is considered simultaneously.