上海海洋大学学报2024，Vol.33Issue(1)：53-66,14.DOI:10.12024/jsou.20221204052
黄河口盐碱地区稻蟹种养模式下中华绒螯蟹适宜放养密度的初探
Preliminary study on the suitable stocking density of Chinese mitten crab(Erio cheir sinensis)under rice-crab co-culture system in the saline-alkaline area of the Yellow River Estuary
摘要
Abstract
A 180-day rice-crab co-culture experimental trial(female crab∶male crab=1∶1)was conducted in the saline-alkaline area of the Yellow River Estuary to find the suitable stocking density of Chinese mitten crab(Eriocheir sinensis).The effects of different stocking densities(1.50 ind./m2,0.75 ind./m2 and 0.38 ind./m2,indicated as D150,D075 and D038 groups,respectively)on the growth and culture performance,edible tissue indices,proximate composition,physiological metabolism,contribution of food and economic performance of rice-crab were studied.The results showed that:(1)The weight gain rate(WGR),specific growth rate(SGR)and survival rate(SR)of crab increased significantly with the decrease of stocking density,while the yield and feed conversion rate(FCR)decreased significantly.(2)There was no significant difference in edible tissue index and total edible rate among different stocking density groups,but the gonadosomatic index(GSI),hepatosomatic index(HSI)and total edible yield(TEY)of female crab increased slightly with the decrease of stocking density.(3)With the decrease of stocking density,the contents of crude protein in muscle of females and males decreased significantly,while the contents of crude lipid in hepatopancreas of females increased significantly.(4)In terms of physiological metabolism indices,the activities of alkaline phosphatase(ALP)and acid phosphatase(ACP)in hepatopancreas of females increased significantly with the decrease of stocking density,while total antioxidant capacity(T-AOC)and the contents of malondialdehyde(MDA)in serum decreased significantly.Similarly,ALP activity in hepatopancreas of males was the highest in D038 group,while the contents of MDA in hepatopancreas and T-AOC in serum were decreased significantly and minimum value was found in D038 group.(5)The first food source of crabs under different stocking densities was formulated feed(39.39％-52.33％).With the decrease of stocking density,the contribution of feed in food sources was increased,while the contribution of background crabs was decreased.(6)There was no significant difference in partial return and partial gross and the highest profit of each group,whilst the return-on-investment(ROI)of D038 group was significantly higher than that of other density groups.In summary,although the crabs in high-density group had the highest total yield and partial return,the crabs in low stocking density group achieved the best growth performance,health status,profit and ROI.Therefore,under the condition of this experiment,the suitable stocking density of crabs is 0.38 ind./m2 under rice-crab co-culture system in the saline-alkaline area of the Yellow River Estuary.关键词
盐碱地/稻蟹种养/放养密度/养殖性能/饵料贡献Key words
saline-alkaline area/rice-crab co-culture/stocking density/culture performance/food contribution分类
农业科技引用本文复制引用
李凤璐,朱筛成,李嘉尧,成永旭..黄河口盐碱地区稻蟹种养模式下中华绒螯蟹适宜放养密度的初探[J].上海海洋大学学报,2024,33(1):53-66,14.基金项目
国家现代农业产业技术体系项目(CARS-48) （CARS-48）
黄河三角洲领军人才项目(DYRC20190210) （DYRC20190210）
