對蝦遊池在對蝦養殖中是十分常見的現象,按引起的原因大致可分為如下六種情況;
一、缺餌遊池 zhezhongqingkuangzaiduixiayangzhiqianzhonghouqijunkefasheng,yuanyinduoweierliaobuzuhuoerliaozhiliangchayinqiduixiashangyoudaoshuimiansuoermishi,duixiabiaoxianweiyouguilvxingdequnyou。zhezhongqingkuangrufashengzaiqianqi,yingzhuyizuohaojichuerliaodepeiyugongzuohuotouxiaokelideduixiasiliao,zaizhonghouqifasheng,yingjishitouweiyoushixingqiang、適口性好、營養全麵的配合餌料,以免對蝦體質下降或相互殘食。
二、水清遊池 yinqizhezhongyouchideyuanyinzhuyaoshimeiyouzuohaofeishuigongzuo,huoyeguangchongdengdaliangfanzhizaocheng,zhishitoumingduguoda,duixiafuzaichidiwuanquanganerchanshengyouchi,xiaduobiaoxianweishoujingyiqitiao,qunyou。ruguoshiyouyumeiyouzuohaofeishuigongzuoyinqide,zheshiyingcaiqudecuoshiyou:①適當換水並加深水位;②使用有機肥或無機肥等進行肥水;③加人光合細菌等微生物製劑。
三、異常天氣遊池 zhuyaoshiyouyutianqitubian,chishuilihuayinzijijubianhua,duixiashoucijiqilaiyouchi。ruxiayuhouhuizaochengdicengshuirebiaocengshuiliang,shuitifenceng,dicengqueyang,xiabiaoxianweixiayuhoushangdaoshuimianqunyou,duoshuyouyidingdefangxiangxing。cishiyingkaidongzengyangjibashangxiacengshuijiaobanjunyun,zaishieryanghualv0.2ppm,半天後投沸石粉或麥飯石粉。
四、queyangyouchifashengyuyejianjimenretianqi,zheshichishuiderongyangjiaodi,chaoguoduixiadenaishoufanwei,duixiadabufenqifu,zaichibiaoyoudongwuyidingdefangxiangxing,duoweidanyou,chuxianciqingjingkecaiyongruxiacuoshi:①開動增氧機增氧;②換新鮮海水;③加一些增氧劑等進行急救。
五、池底汙染遊池 這種情況—般在老化蝦塘比較普遍,由於連年養蝦又未能徹底清淤,致使池底存在較多的殘餌和排泄物,在長期缺氧狀態下,產生氨氮、硫(liu)化(hua)氫(qing)等(deng)有(you)害(hai)物(wu)質(zhi),積(ji)累(lei)到(dao)一(yi)定(ding)程(cheng)度(du)便(bian)不(bu)利(li)於(yu)對(dui)蝦(xia)潛(qian)伏(fu),從(cong)而(er)浮(fu)起(qi)遊(you)池(chi),此(ci)種(zhong)遊(you)池(chi)無(wu)明(ming)顯(xian)的(de)規(gui)律(lv)性(xing),既(ji)有(you)群(qun)遊(you)也(ye)有(you)散(san)遊(you),在(zai)池(chi)麵(mian)或(huo)水(shui)中(zhong)都(dou)可(ke)能(neng)存(cun)在(zai)。碰(peng)到(dao)這(zhe)種(zhong)情(qing)況(kuang)可(ke)采(cai)用(yong)以(yi)下(xia)措(cuo)施(shi):①在放苗前最好清淤10cm以上,之後暴曬數日;②平常開動增氧機,把池底的殘餌和排泄物打至表麵,使有害物質氧化成無毒物質;③撒人沸石粉、膨潤土等改良劑急救;④平時結合使用光合細菌等有益菌。
六、蝦病遊池 對蝦感染了白斑、熒光、爛lan鰓sai等deng疾ji病bing也ye可ke引yin起qi遊you池chi,此ci種zhong情qing況kuang蝦xia多duo在zai水shui麵mian做zuo緩huan慢man遊you動dong或huo狂kuang遊you,多duo單dan遊you而er不bu成cheng群qun,蝦xia受shou驚jing無wu明ming顯xian反fan應ying,碰peng到dao此ci種zhong情qing況kuang可ke能neng是shi蝦xia病bing大da量liang發fa生sheng的de前qian兆zhao,應ying緊jin密mi觀guan察cha,仔zai細xi檢jian查zha病bing蝦xia,確que診zhen後hou對dui症zheng下xia藥yao,以yi免mian造zao成cheng較jiao大da危wei害hai。
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