yuzhongzaijinrudongjihou,suizheshuiwendexiajiang,qixinchendaixiezuoyongzhujianjianruo,shiyuyexiangyingjiantui,tizhibiandejiaoxuruo,yizaodihaishengwudegongjihezhibingjundeqinxi,yingxiangchitangyuzhongyuedongdechenghuolv。yinci,ruhebaozhengyuzhongshunliyuedong,shichitangyangyushengchandeyigezhongyaohuanjie。tongguoduoniandeshengchanshijian,womenjileiletigaochitangyu種越冬成活率的成功經驗。
1、培育體質健壯的優良魚種
越冬前期就應加強對池塘魚種的飼養管理工作,投喂高質量的餌料,如草食性魚種除投喂鮮嫩草料外,還要投喂一定量的穀芽、麥芽、營養全價的商品餌料;而er濾lv食shi性xing魚yu種zhong應ying通tong過guo培pei肥fei水shui質zhi,使shi池chi塘tang水shui體ti中zhong有you豐feng富fu的de餌er料liao生sheng物wu,以yi滿man足zu魚yu種zhong攝she食shi的de需xu要yao。其qi次ci是shi調tiao節jie好hao池chi塘tang水shui質zhi,使shi水shui體ti有you充chong足zu的de溶rong氧yang,以yi達da到dao提ti高gao魚yu種zhong規gui格ge和he肥fei滿man度du。生sheng產chan實shi踐jian證zheng明ming,在zai相xiang同tong的de水shui體ti條tiao件jian下xia,肥fei滿man度du相xiang同tong的de魚yu種zhong,規gui格ge越yue大da,成cheng活huo率lv越yue高gao;魚種規格相同時,肥滿度大的魚種的越冬成活率也高。所以說培育大規格、肥滿度大的魚種為其安全越冬奠定了基礎。
2、為越冬魚種創造良好的環境條件
(1)池塘條件:選擇用作魚種越冬的池塘,應具備水源充足,排注水方便,無汙染源,麵積2——3畝,池埂高2.5米以上,塘硬堅實,不滲不漏,保肥力度好,池塘淤泥在10——20厘米厚,池塘內無雜草,背北向南長方形池塘為宜。
(2)水質要求:水(shui)質(zhi)的(de)好(hao)壞(huai)是(shi)直(zhi)接(jie)影(ying)響(xiang)到(dao)魚(yu)種(zhong)越(yue)冬(dong)成(cheng)活(huo)率(lv)的(de)關(guan)鍵(jian)因(yin)素(su),因(yin)此(ci),為(wei)調(tiao)節(jie)好(hao)池(chi)塘(tang)水(shui)質(zhi),在(zai)魚(yu)種(zhong)下(xia)塘(tang)前(qian),要(yao)用(yong)生(sheng)石(shi)灰(hui)清(qing)塘(tang)消(xiao)毒(du),按(an)每(mei)畝(mu)用(yong)生(sheng)石(shi)灰(hui)80——120千克,溶解後全塘潑灑,能消除凶猛魚類和耗氧耗肥的低值野雜魚,並可穩定水體pH值為6.8——7.8。根據池塘水質的肥瘦程度還要施基肥和追肥,施基肥時一般按每畝水麵施用腐熟的人糞尿80——200千qian克ke,追zhui肥fei時shi宜yi用yong適shi量liang的de尿niao素su或huo碳tan氨an等deng速su效xiao肥fei料liao來lai培pei肥fei水shui質zhi,培pei育yu一yi定ding數shu量liang的de浮fu遊you生sheng物wu。當dang池chi塘tang水shui質zhi過guo肥fei時shi應ying注zhu入ru新xin水shui,排pai除chu部bu分fen舊jiu水shui,保bao證zheng池chi塘tang水shui質zhi鮮xian、嫩、爽、活的標準,為魚種越冬創造良好的環境條件。
(3)水位控製:魚種越冬池塘的水位一般應保持在2miyishang,yinweishuiweijiaoshenshi,shuiwenfashengbianhuashisuochanshengdewenchabianfuyexiao,duiyuzhongyuedongjiaoweianquan。ruochitangshuiweiguoqian,jiyishishuitixingchengbingdong,xiangduijianshaoleshuitikongjian,erdaozhiyuzhongqueyanghedongshang。
(4)搭建避風棚:為wei避bi免mian風feng雪xue的de侵qin襲xi,可ke根gen據ju池chi塘tang水shui麵mian的de大da小xiao確que定ding搭da建jian避bi風feng棚peng的de數shu量liang,以yi稻dao草cao或huo蘆lu杆gan為wei材cai料liao編bian織zhi而er成cheng,用yong竹zhu杆gan或huo木mu樁zhuang將jiang其qi固gu定ding在zai池chi塘tang的de任ren意yi位wei置zhi,避bi風feng棚peng應ying高gao水shui麵mian10——15厘米,在棚下方堆入一定數量的豬、牛糞,這些糞在腐爛發酵時所產生的熱能有利魚種越冬,同時也可為魚種提供餌料。
3、適時並塘 合理放養
每年的10月初至11月小旬是魚種並塘的適宜期,因為當水溫降至10℃yixiashi,yuzhongjibentingzhisheshi,youliyuyuzhongbingtang。yuzhongbingtangshiyingxuanzeqingtianwufengdetianqi。bingchiguozao,shuiwenjiaogao,yuzhonghuodongliqiang,caozuoguochengzhongyishiyuzhongshoushang,ganranbingjun,bingqiemijiyuchitangneijiyiyinqiqueyang,ruobingtangtaichi,caozuobubian,haiyishiyutidongshang。
zaiyuzhongbingtangshiyaokongzhimidu。rufangyangguoxi,yingxiangchitangliyonglv,zaochengshuitidelangfei,erfangyangguomiyizaochengshuitiqueyangfantang,yingxiangyuzhongdeshengchangfayu。yibanmeimushuimiantoufang6——10厘米魚種3——5萬尾,10——20厘米魚種不超過1萬尾為原則。
4、做好越冬池塘的管理
(1)適時注入新水,使池塘水位保持在2——2.5mi,ruguotiaojianjubeishi,nengbaochiyuedongchitangneiyouweiliushuizegengjia,zheyangbujinnengbaochichitangshuizhilianghao,erqiehaikejianshaohuokongzhibingdongcengdehouduheyouxiaodizengjiabingcengxiashuitiderongyang。
(2)在zai嚴yan冬dong時shi節jie,因yin並bing塘tang魚yu種zhong放fang養yang密mi度du相xiang對dui過guo大da,加jia致zhi冰bing層ceng對dui池chi塘tang形xing成cheng密mi封feng狀zhuang,易yi導dao致zhi魚yu種zhong嚴yan重zhong缺que氧yang窒zhi息xi死si亡wang。因yin此ci每mei天tian要yao堅jian持chi巡xun塘tang,對dui冰bing層ceng密mi封feng嚴yan重zhong時shi要yao及ji時shi破po冰bing或huo在zai池chi塘tang中zhong打da冰bing孔kong增zeng氧yang,並bing徹che底di清qing除chu冰bing麵mian上shang的de積ji雪xue和he雜za物wu,保bao持chi冰bing層ceng的de透tou光guang性xing,以yi免mian影ying響xiang浮fu遊you植zhi物wu的de光guang合he作zuo用yong的de增zeng氧yang效xiao果guo。 #p#分頁標題#e#
(3)做(zuo)好(hao)魚(yu)病(bing)的(de)防(fang)治(zhi)工(gong)作(zuo),在(zai)冬(dong)季(ji)魚(yu)種(zhong)易(yi)感(gan)染(ran)深(shen)水(shui)黴(mei)病(bing),故(gu)在(zai)並(bing)塘(tang)的(de)操(cao)作(zuo)過(guo)程(cheng)中(zhong),要(yao)細(xi)心(xin)操(cao)作(zuo),避(bi)免(mian)魚(yu)種(zhong)體(ti)表(biao)受(shou)傷(shang),當(dang)發(fa)現(xian)病(bing)魚(yu)或(huo)死(si)魚(yu)要(yao)及(ji)時(shi)撈(lao)出(chu)進(jin)行(xing)消(xiao)毀(hui)或(huo)深(shen)埋(mai),防(fang)止(zhi)病(bing)菌(jun)的(de)擴(kuo)散(san)蔓(man)延(yan)。
(4)待dai開kai春chun冰bing雪xue消xiao融rong後hou,水shui溫wen逐zhu漸jian上shang升sheng,應ying盡jin早zao開kai食shi,堅jian持chi少shao量liang多duo次ci,以yi當dang天tian吃chi完wan為wei準zhun,投tou喂wei精jing餌er料liao,使shi越yue冬dong後hou的de魚yu種zhong盡jin快kuai恢hui複fu體ti質zhi,增zeng強qiang抗kang病bing力li。
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