隨著氣溫的不斷升高,魚塘魚類浮頭現象經常發生。為了盡量減少魚類死亡,現將判斷魚類浮頭及解救措施簡要介紹如下:
一、預yu測ce浮fu頭tou。天tian氣qi熱re,水shui溫wen高gao,水shui質zhi較jiao肥fei時shi,經jing常chang會hui在zai黎li明ming或huo半ban夜ye以yi後hou發fa生sheng浮fu頭tou,這zhe種zhong情qing況kuang隻zhi要yao不bu遇yu天tian氣qi變bian化hua,經jing常chang注zhu意yi衝chong注zhu新xin水shui即ji可ke。天tian氣qi悶men熱re,無wu風feng,氣qi壓ya低di,打da雷lei陣zhen雨yu,水shui中zhong大da量liang缺que氧yang,這zhe種zhong情qing況kuang會hui引yin起qi泛fan池chi,應ying停ting食shi,並bing及ji時shi增zeng氧yang。如ru天tian氣qi特te別bie悶men熱re,起qi風feng下xia雨yu,水shui色se突tu變bian,池chi水shui表biao層ceng水shui溫wen突tu然ran下xia降jiang,魚yu類lei食shi欲yu突tu然ran減jian退tui,這zhe是shi將jiang要yao發fa生sheng嚴yan重zhong浮fu頭tou的de預yu兆zhao,故gu在zai浮fu頭tou前qian,必bi須xu把ba池chi水shui中zhong草cao料liao全quan部bu撈lao清qing,並bing要yao及ji時shi增zeng氧yang,以yi預yu防fang浮fu頭tou或huo減jian輕qing浮fu頭tou程cheng度du,防fang止zhi引yin起qi泛fan池chi。魚yu體ti無wu病bing,但dan吃chi食shi量liang突tu然ran減jian少shao,表biao明ming水shui中zhong缺que氧yang。
二、如何判斷魚類浮頭輕重
1、qingdufutou。yuleizhizailimingqianhouduanshifutou,yidanshoujingqianrushuizhong,bujiuzaiyouchushuimian,dangrichuhou,fuyouzhiwujinxingguanghezuoyong,kaishishifangyangqi,yuleihuifuzhengchang。
2、嚴重浮頭。魚類在白天 或上半夜因缺氧而浮頭,浮頭持續時間長,魚群散浮於水麵,池邊也有很多魚浮頭,見人不動,受驚反應遲鈍。
由於各種魚耗氧率、窒息點不同,浮頭先後順序也不一。因此,也可以根據規律來判斷浮頭輕重。白鰱、花鰱為一般性浮頭;草魚浮頭,表示浮頭嚴重;鯉魚浮頭時則更為嚴重;如鯽魚也浮頭,則其它魚類早已大批死亡。因此,發現花、白鰱浮頭時應引起重視。
三、jiejiufutoudebanfa。jijiangfutouhuoyifaxianfutoushi,yingjishiyongzhushuishebei,yinzhuxinshuizengyangjiejiu。zhushuirutongjiuhuo,shuhuwushi,zengyangbujishi,yuleijiuyaosiwang。yinci,kushujijie,tianqibuzhengchangshi,yaotiqianzhushuiyufang,zhibanrenyuanyingjiaqiangyejianxunchi,bunengyousuoshuhu。gaochanjingyangchitang,zuiyouxiaobanfashishiyongzengyangji。
注水時水管要平放在水麵,一是不致衝起池底汙泥,避免引起浮頭更趨惡化;二(er)是(shi)在(zai)池(chi)中(zhong)迅(xun)速(su)衝(chong)注(zhu)新(xin)水(shui),以(yi)便(bian)盡(jin)快(kuai)地(di)把(ba)浮(fu)頭(tou)魚(yu)群(qun)吸(xi)引(yin)到(dao)溶(rong)氧(yang)較(jiao)多(duo)的(de)新(xin)水(shui)內(nei),維(wei)持(chi)其(qi)呼(hu)吸(xi)所(suo)必(bi)需(xu)的(de)氧(yang)氣(qi)。緊(jin)急(ji)時(shi)刻(ke)用(yong)噴(pen)灌(guan)機(ji)注(zhu)水(shui),效(xiao)果(guo)更(geng)好(hao)。
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