稻渔综合种养下放养密度与投喂策略对福瑞鲤2号生长、产量及经济效益的影响OA

Taking the integrated rice-fish culture model in alpine regions as the research object,this paper explores the effects of different stocking densities and feeding strategies on the growth,yield,and economic benefits of FFRC No.2 common carp.Three stocking density treatments were set up in the experiment,namely 281 ind./hm2(M1),562 ind./hm2(M2)and 1,125 ind./hm2(M3).A feeding group(Y3)with a high density of 1,125 ind./hm2 was also established.Fingerlings of FFRC No.2 common carp were adopted,and standardized paddy field reconstruc-tion,fingerling stocking,and feed feeding practices were implemented.The results show that stocking density exerts a significant effect on the growth and yield of common carp.Under the stocking density of 1,125 ind./hm2 with sup-plementary feeding,the average individual weight of FFRC No.2 common carp reached(744.33±35.35)g,with an average weight gain of(610.93±35.04)g and a weight gain rate of(458.72±32.72)%.These indicators were 116.88%,191.2%,and 188.65%higher than those of the unfed group with the same stocking density,respective-ly.Without supplementary feed,fish growth performance was negatively correlated with stocking density,while a-quatic product yield per unit area was positively correlated with stocking density.In terms of economic benefits,the fish output value of Group Y3(high stocking density with supplementary feeding)reached 15,288.6 CNY/hm2,with an input-output ratio of 1:2.83,which was significantly higher than that of Group M3(1:2.33).Among the unfed treatments,Group M2 achieved the highest input-output ratio of 1:2.66,remarkably superior to Group M1(1:2.38)and Group M3(1:2.33).This study verifies that moderately increasing stocking density combined with scientific feeding in integrated rice-fish culture in alpine regions can maximize the utilization of water resources while balancing fish growth performance and economic returns,providing a scientific reference for the high-yield and efficient development of this culture model.