The Pond Aquaculture Pattern And Benefit Analysis Of Grass Carp To Some Areas Of Hubei Province

Grass Carp is the mine breed of freshwater aquaculture in China,also themain breeding fish in Hubei.It Comprehensively analyses the relationship betweenthe Grass Carp pond breeding mode and the Breeding-benefit、the Quality-changeof pond aquaculture water、the Feed、the Growth of Grass Carp、Benefit,based onthe original data about the Grass Carp ponds collected over the last few years.obtain thefollowing results:（1）The model of Grass Carp’s pond aquaculture in HubeiThree modes, mainly,①The model of feeding Small specifications GrassCarp,seeding small one time,and saling them all when they are older than1000g,before the end of this year.②The model of seeding small fish and big fishtogether (some is weighting50g,another is weigthting250-500g),and fishing themmore times before the end of this year also.③The model of feeding big fish(750-1000g),and saling them over4000g.Three modes have their advantages and disadvantages：the better is50g to modelone, because the survival rate is so low under this specification. The better stockingdensity is1500-2000tail/667m2, so it can ensure Economic performance Relatively.Itcan improve the Benefit of feeding that chosing model two, and saling fish day by daywhile the price of fish is so low. The Economic performance of model three be wellwhile the price of Large size is higher and higer than normal size.(2) In this paper, it provides a model of how to the Benefit of pond culture, andthis model is so easy.Analysising all cost of the cultivation, and find out the keyproblem that astricting high efficiency, and guiding Fishermen how to chose theSpecification and the time of fish and the feed. In order to provide some referenceat the actual operation for Grass Carp aquaculturefor of the Hubei province. (3) The monitoring of the water quality display thatAfter testing the monitoring of the water quality, we can find this: most ofponds’ water quality is worse, Nitrite is overproof after June,Ammonia nitrogen andNitrite is overproof after July.(4) The relationship between quality and Grass Carp aquaculture feed Feed qualityis directly related to Grass Carp growth rate. The higher the level of fat,the lower thefeed coefficient, when feed lipid level is between3-6%,and the condition ofunchanged at the protein level。The quality choice of Protein source is directlyrelated to the feed coefficient;The feed coefficient will be lower when the feed changeswith the season.