Freshwater Fish Pond Culture and Management淡水鱼池塘养殖管理_0.docx

FreshwaterFishPondCultureandManagement淡水鱼池塘养殖管理;A,1_1%1.havemoreoxygeninthewater'1.:1canberotatedwithriceorothercropskrnstfarmers,afewsnal1pondsarebetterthanoneortwolargeamp;Mk-Farmersmustalsomanagetheiragriculturalcrops,anditisWficultforthemtomanagelargeponds.Also,mostfarmersjustdok$ihavealotofland.Agoodsiseforasinglefishpondisprobab1ybtween1and5ares(100and50Chn).$rmersaregoingtobemostinterestedinworkingthefishpondintoani!readygoingfarmassimplyandeasilyaspossible.Thisiswhy:ul.turingfishinricepaddiesispopularinsomeareas.Infact,fish©ndscanbesetupinalmostanyareawherearicepaddycanbelocated：-evenonsteephi!sides.8:amp;r;.+W:.pondsareeasiertocareforandconstruct.Asafarmergains$erience,hecangoonandbuildlargerponds.Startingsmallisaodideauntilthefarmerfeelsheknowswhatheisdoingandissuccessful.The.depthofpondsdependsuponthefishbeinggrown,differentkindsof*food,andthedepthofthepondsoffoodproducedbythepond.Acornnoncarp,for©stance,eatswormsandotherbottomorganismsandmusthaveapondtamp;tisnotdeeperthan2in.Butwhenthecarparefry,theyeatonlykton,thetinyfree-floatingplantsandanimalssuspendedthroughoutOhkwater.Sonurserypondsforcarpfryareoftenonly0.5mdeep,(8smentionedbefore,eggsandfrycanbetakencareofinalmostany'S6$ntalnerwhichholdsenoughwaterandhasenoughoxygen.)i:,Etherfishfeedatother1eve1sinthepondsdependingontheirlife%ag,eandontheirownfoodpreferences.Averydeeppondwillnotbroduceasmuchfoodbecausethesunlightcannotlightthewaterbelowcamp;aindepth,andtheplanktonwillnotbeabletomakeoxygenforthepish-(seewaterquality).Ontheotherhand,averyshallowpondmight,tamp;turbid,covered,bywaterplantseasi1y,;andbecomeveryhot.Mostpondownersmakesurethatthewaterdepthattheedges,ofthepondis01east75cmtodiscouragewaterplants.Itisbestifthepon.