1.yumiaozairuchiqianyitianyaoyongmiyanwanglajicikongtang。yifangmianshiduijizaichidideshengyuqingtangyaowuchongfenrongjie,yifangduhaiyumiao,lingyifangmianjinyibuqingchudihai,ruguofaxiandihaikeyong0.5克/立方米濃度的敵百蟲全池潑灑進行殺滅,此濃度對輪蟲沒有殺滅作用。
2.zaiyumiaoruchiqianyidingyaojianzhaqingtangdeyaowudulishifouxiaoshi,yijishuidefeidushifouheshi。shouxianqubantongshui,yinyoushibiaocengshuiduliyixiaoshi,dandicengdedulirengranhenqiang,jiangyumiaofangrushuizhongguancha8小時~10小時,看是否正常,以確定魚苗能否入池。ph值應在7~8.5範圍內。其次可根據水色、透明度和餌料生物情況判斷水的肥度,如發現池水過肥,可加注清水調劑,池水的肥度不夠,應立即補施少量化肥或增投人工餌料。
3.魚苗入池時要求池水溫度不能低於運魚水溫3℃,ruguoshuiwenxiangchaguoda,jiuyingxianzhujiantiaozhengwencha,yumiaoshiyinghouzairuchi。yongsuliaodaiyunshudeyumiao,zairuchiqianyingxianjiangsuliaodaikaikouhuanmanfangruyuxiananzhizaiyuchizhongdewangxiangnei,daichineishuiwenyudaineideyizhi,rangchishuiyudaineideshuizhujianhunhe,ting10分鍾~20分鍾後再將魚苗連水一起緩慢倒入箱內,借此調節水溫差和魚苗對袋內氣壓改變的適應,有人稱為“緩苗”。ruguokaidaishifaxianyumiaochengyangwozhuangtai,zheshieryanghuatanzhongduxianxiang,zhiyaojingguohuanmiao,fangruqingshuiyiduanshijianjikehuifu。ruguojiangyumiaocongdaizhongzhijieqingruchinei,jishizaifangyangshirouyanguanchashenghuozhengchang,xiatanghouyehuifashengsiwang,jiyunshuhousiwang。yincisuliaodaiyunshuyumiao,ruchiyaotebiexizhicaozuo,huanmiaochulishibibukeshaodezhongyaobuzhou。
4.魚苗入池前應進行藥物消毒。可用1%的小蘇打水浸洗20分鍾~30分鍾或1萬iu/l的青黴素溶液浸洗1小時。
5.堅持魚苗飽食後下塘。魚苗飼養的生產實踐證明,魚苗入池前喂1次~2次(ci)熟(shu)蛋(dan)黃(huang)或(huo)飼(si)料(liao)酵(jiao)母(mu),如(ru)能(neng)撈(lao)取(qu)輪(lun)蟲(chong)投(tou)喂(wei)更(geng)理(li)想(xiang),其(qi)成(cheng)活(huo)率(lv)或(huo)成(cheng)長(chang)速(su)度(du)都(dou)比(bi)不(bu)喂(wei)的(de)有(you)明(ming)顯(xian)提(ti)高(gao),因(yin)此(ci)很(hen)多(duo)地(di)方(fang)堅(jian)持(chi)魚(yu)苗(miao)飽(bao)食(shi)後(hou)下(xia)塘(tang)。魚(yu)苗(miao)運(yun)到(dao)後(hou),先(xian)用(yong)網(wang)箱(xiang)喂(wei)餌(er),再(zai)重(zhong)新(xin)過(guo)數(shu)入(ru)池(chi)。在(zai)網(wang)箱(xiang)內(nei)取(qu)苗(miao)時(shi),上(shang)風(feng)頭(tou)的(de)魚(yu)苗(miao)一(yi)般(ban)體(ti)質(zhi)較(jiao)強(qiang),個(ge)體(ti)較(jiao)大(da),下(xia)風(feng)頭(tou)的(de)魚(yu)苗(miao)體(ti)質(zhi)較(jiao)差(cha),個(ge)體(ti)較(jiao)小(xiao),這(zhe)樣(yang)就(jiu)可(ke)將(jiang)個(ge)體(ti)大(da)小(xiao)不(bu)同(tong)、體質強弱有別的魚苗基本分開,以免在飼養過程中個體大、體質強的魚苗排擠個體小、體質弱的魚苗,而逐漸形成大小分化。但在操作過程中要嚴防網箱中缺氧,以免造成損失。
6.魚苗下塘時要選擇深水處,緊貼水麵慢慢放苗。據試驗,魚苗從30厘米高處倒入水中,可損傷5%~10%;距水麵60厘米高時,魚苗損傷率可達20%~30%。因(yin)此(ci),魚(yu)苗(miao)入(ru)池(chi)一(yi)定(ding)要(yao)注(zhu)意(yi)緩(huan)慢(man)輕(qing)放(fang),魚(yu)苗(miao)放(fang)養(yang)後(hou)不(bu)要(yao)立(li)即(ji)離(li)開(kai),要(yao)等(deng)魚(yu)苗(miao)散(san)開(kai)遊(you)入(ru)池(chi)中(zhong)後(hou)再(zai)離(li)去(qu),如(ru)發(fa)現(xian)魚(yu)苗(miao)密(mi)集(ji)成(cheng)團(tuan),要(yao)用(yong)水(shui)滴(di)輕(qing)輕(qing)潑(po)灑(sa),使(shi)其(qi)散(san)開(kai)遊(you)入(ru)池(chi)中(zhong)。遇(yu)到(dao)起(qi)風(feng)天(tian)氣(qi),要(yao)在(zai)上(shang)風(feng)頭(tou)深(shen)水(shui)處(chu)入(ru)池(chi),以(yi)免(mian)魚(yu)苗(miao)被(bei)風(feng)吹(chui)到(dao)池(chi)坡(po)或(huo)壓(ya)到(dao)池(chi)底(di)而(er)造(zao)成(cheng)傷(shang)亡(wang)。
7.tongyichitangyingfangyangguigeyizhidetongzhongyumiao,bingjinliangzhengquyicifangzu,yimianfashengdayuchixiaoyujichuchiguigebuqi。guigebuyizhideyumiaofangyangzaiyiqi,dayumiaodeshengchangsuduyuanyuanchaoguoxiaoyumiao,liangjifenhuajiugengjiamingxian。
8.自行孵產魚苗的下塘標準。看到兩個眼點、一yi個ge腰yao點dian這zhe三san個ge點dian,並bing能neng平ping行xing遊you泳yong時shi即ji可ke入ru池chi,否fou則ze要yao及ji時shi投tou喂wei,以yi免mian魚yu苗miao因yin饑ji餓e而er致zhi死si。下xia塘tang的de時shi間jian要yao選xuan擇ze無wu風feng晴qing天tian的de上shang午wu,避bi免mian風feng天tian、雨天或夜間入池。
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