筆者根據調查分析認為,造成海參病害暴發和蔓延的主要原因:一yi是shi不bu重zhong視shi清qing淤yu或huo清qing淤yu不bu徹che底di,導dao致zhi水shui質zhi惡e化hua。有you很hen多duo刺ci參can養yang殖zhi池chi養yang殖zhi多duo年nian不bu清qing淤yu,使shi池chi底di和he礁jiao石shi上shang堆dui積ji很hen深shen的de海hai參can糞fen便bian。淤yu泥ni和he雜za藻zao,尤you其qi是shi池chi底di的de低di溫wen藻zao類lei,經jing過guo冬dong、夏兩季開始腐爛變質,從而滋生細菌、黴菌、jishengchongdengduozhongbingjun,daozhihaicanfabing。youdecanchisuijinxingleqingyu,danshi,youyucaiquchuantongdefangengrishaidechulifangfa,genbenbunengchedijiejuechididewuranwenti,tebieshinaxiebachidiwunituizhichibian、壩(ba)坡(po)的(de)做(zuo)法(fa)更(geng)是(shi)不(bu)適(shi)宜(yi)的(de)。當(dang)清(qing)淤(yu)後(hou),再(zai)納(na)水(shui),這(zhe)些(xie)底(di)泥(ni)仍(reng)要(yao)浸(jin)泡(pao)於(yu)水(shui)中(zhong),仍(reng)會(hui)敗(bai)壞(huai)水(shui)質(zhi),滋(zi)生(sheng)病(bing)菌(jun)及(ji)寄(ji)生(sheng)蟲(chong),導(dao)致(zhi)海(hai)參(can)發(fa)病(bing)。二(er)是(shi)不(bu)重(zhong)視(shi)參(can)池(chi)用(yong)水(shui)的(de)自(zi)淨(jing)及(ji)消(xiao)毒(du)技(ji)術(shu)。由(you)於(yu)受(shou)環(huan)境(jing)汙(wu)染(ran),在(zai)近(jin)海(hai)的(de)淺(qian)海(hai)地(di)帶(dai),特(te)別(bie)是(shi)在(zai)沿(yan)海(hai)城(cheng)鎮(zhen)附(fu)近(jin)的(de)海(hai)口(kou)、neiwandoushoudaobutongchengdudeyoujiwuran。lingwai,suizhehaishuijiyuehuayangzhidexunsufazhan,yangzhiyedezishenwuranyeriquyanzhong,daliangzishengenghuandeyangzhiyongshuibeipaichuhou,wangwangyuwurandeyananshuiyiqiyoubeichouhuiyangcanchizhong,xingchengdaliangdeyoujiwudengjinrucanchi,chengweigezhongxijunjijishengchongdenglianghaodeyangliao,cujinqidaliangzichanghefanzhi。jibianjinxingdaliangdeshuitijiaohuanyewujiyushi,yinweiwaihaigenbenjiumeiyoujiejingshuiyuanlaitiaojieyangcanchishuizhi。erqiaqiaxuduoyangcanhuwangwangzhizhongshibiaomiandechishuishuizhitiaokong,erhulvelediniduishuihuanjingdeyingxiangjihuanjingwuransuozaochengdeeguo,quefayuyongshuidezijingjixiaodujishuhejingyan。
根據調查總結,筆者認為要預防池塘養殖海參的病害發生,必須做好海參養殖池塘的清淤和消毒。具體做法有以下幾點:
一、改變傳統的清淤方法,做到清淤徹底幹淨不留後患。
海hai參can養yang殖zhi池chi與yu蝦xia養yang殖zhi池chi的de清qing淤yu方fang法fa有you所suo不bu同tong,主zhu要yao是shi因yin為wei海hai參can池chi內nei設she有you人ren工gong築zhu礁jiao,這zhe給gei清qing淤yu工gong作zuo帶dai來lai很hen大da的de麻ma煩fan和he困kun難nan。有you很hen多duo參can池chi從cong建jian成cheng就jiu從cong未wei進jin行xing清qing淤yu,使shi池chi底di的de汙wu泥ni及ji海hai參can糞fen便bian層ceng深shen達da幾ji厘li米mi或huo十shi幾ji厘li米mi厚hou,這zhe就jiu會hui給gei池chi水shui水shui質zhi造zao成cheng很hen大da影ying響xiang,會hui降jiang低di池chi中zhong的de溶rong解jie氧yang含han量liang,導dao致zhi氨an氮dan或huo硫liu化hua氫qing升sheng高gao,容rong易yi造zao成cheng海hai參can發fa病bing。傳chuan統tong的de池chi塘tang清qing淤yu法fa,是shi利li用yong冬dong季ji采cai取qu翻fan耕geng日ri曬shai風feng化hua方fang法fa或huo把ba池chi底di汙wu物wu推tui到dao池chi邊bian、壩(ba)坡(po),這(zhe)種(zhong)方(fang)法(fa)處(chu)理(li)後(hou),池(chi)底(di)由(you)黑(hei)變(bian)黃(huang),臭(chou)味(wei)消(xiao)失(shi)。但(dan)這(zhe)一(yi)處(chu)理(li)方(fang)法(fa)隻(zhi)是(shi)表(biao)麵(mian)現(xian)象(xiang),並(bing)未(wei)解(jie)決(jue)根(gen)本(ben)問(wen)題(ti),底(di)泥(ni)中(zhong)的(de)一(yi)些(xie)硫(liu)化(hua)物(wu)雖(sui)被(bei)氧(yang)化(hua)為(wei)硫(liu)酸(suan)鹽(yan),底(di)泥(ni)變(bian)黃(huang)色(se),氣(qi)態(tai)的(de)硫(liu)化(hua)氫(qing)等(deng)揮(hui)發(fa)掉(diao),臭(chou)味(wei)逐(zhu)步(bu)消(xiao)失(shi),但(dan)隨(sui)著(zhe)底(di)泥(ni)的(de)逐(zhu)漸(jian)幹(gan)燥(zao),細(xi)菌(jun)對(dui)有(you)機(ji)物(wu)的(de)分(fen)解(jie)也(ye)逐(zhu)漸(jian)停(ting)止(zhi),大(da)量(liang)的(de)有(you)機(ji)物(wu)被(bei)幹(gan)燥(zao)後(hou)仍(reng)保(bao)持(chi)於(yu)底(di)泥(ni)中(zhong)。待(dai)參(can)池(chi)再(zai)納(na)水(shui)後(hou),這(zhe)些(xie)底(di)泥(ni)仍(reng)要(yao)浸(jin)泡(pao)於(yu)水(shui)中(zhong),細(xi)菌(jun)、病(bing)菌(jun)的(de)分(fen)解(jie)活(huo)動(dong)又(you)開(kai)始(shi)進(jin)行(xing),尤(you)其(qi)到(dao)了(le)高(gao)溫(wen)期(qi),在(zai)池(chi)水(shui)底(di)層(ceng)溶(rong)解(jie)氧(yang)含(han)量(liang)低(di)時(shi),一(yi)些(xie)硫(liu)酸(suan)鹽(yan)又(you)會(hui)重(zhong)新(xin)被(bei)還(hai)原(yuan)為(wei)硫(liu)化(hua)物(wu),使(shi)池(chi)底(di)變(bian)黑(hei),臭(chou)味(wei)加(jia)重(zhong)。所(suo)以(yi)說(shuo)參(can)池(chi)底(di)泥(ni)中(zhong)有(you)機(ji)質(zhi)含(han)量(liang)較(jiao)高(gao)或(huo)養(yang)殖(zhi)已(yi)達(da)到(dao)三(san)年(nian)以(yi)上(shang),汙(wu)染(ran)嚴(yan)重(zhong)的(de)參(can)池(chi),最(zui)好(hao)采(cai)用(yong)吸(xi)漿(jiang)泵(beng)或(huo)吸(xi)泥(ni)船(chuan),將(jiang)底(di)層(ceng)的(de)汙(wu)泥(ni)、糞便及雜藻全部清除出參池以外,並做到徹底幹淨,不留後患。
二、采取衝洗、浸泡的方法,減輕池底的有機汙染。
參池底層汙泥清出後,采用高壓水槍將池內的岩礁逐堆衝刷幹淨,除去汙泥、糞fen便bian及ji雜za藻zao,並bing采cai取qu邊bian攪jiao動dong池chi底di邊bian衝chong洗xi池chi底di邊bian放fang水shui的de方fang式shi,將jiang池chi底di徹che底di衝chong洗xi一yi遍bian,然ran後hou納na水shui浸jin泡pao半ban月yue後hou,再zai將jiang池chi水shui放fang掉diao,納na入ru新xin鮮xian海hai水shui。納na水shui要yao在zai大da汛xun潮chao進jin行xing,每mei月yue換huan水shui一yi次ci,直zhi至zhi春chun季ji放fang苗miao前qian浸jin泡pao結jie束shu,生sheng產chan實shi踐jian已yi證zheng明ming,采cai取qu這zhe種zhong方fang法fa能neng夠gou大da幅fu度du地di降jiang低di池chi底di底di泥ni的de有you機ji汙wu染ran含han量liang。
三、注重消毒技術,保護水體潔淨。
海參係底棲生物,長期底棲生活,而病菌、病毒和寄生蟲等也主要集中在池底,同時養成池池底也是硫化氫、氨氮、yaxiaosuanyandengyouhaizazhinongduzuigaodechusuo,zhiyoushouxianshichidihuanjingzhengchangcainengconggenbenshangyufangbinghaifasheng。raner,xianyoudalianghaicandeyangzhichijunweixiachigaizaoercheng,chididabufenshiluannidizhi,jinguanyitoufangyingzhifuzhejilaigaishanqixihuanjing,danyouyuchengbengao,wangwangfuzhejitouliangbuzu,poshidabufenhaicanchangqiquqizailuannizhizhong,zheshizaochengjibingfanshengdezhongyaoyuanyinzhiyi。zaijiashanggongnongyejishenghuowushuiwuran,yangzhiyezishenyongshuiwuran,yinci,zaiqingyugongzuojieshuhou,caiyongtianjiazhujingji,jiaoban、過濾及消毒措施,加強水體自淨,保護水體是十分必要的。最好畝撒50~100千克生石灰或30克/lifangmipiaobaifenjinxingxiaoduchuli,yizhouhoudaiyaoxingxiaoshihou,zaijinshuifeichijitoumiaoyangcheng。zaiyangchengguochengzhong,yeyaogenjuyangzhichishuijidizhidejutiqingkuang,bingzhenduihaicanduozaidongjidiwenbusheshiyifabingdetedian,shishixiaodu,yibanmeibanyuezhiyigeyuemusa30~50千克的生石灰或沸石粉,進行一次消毒或底質改良,為海參生活創造一個良好的生態環境,入冬前再使用一次30~50克/立方米的海參生態基,全池潑灑,並結合投喂口服特效抗生素藥餌,使海參體內積累一定濃度的抗生素以增強海參在冬季的抗病能力。
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