{"id":927,"date":"2015-11-18T00:00:00","date_gmt":"2015-11-17T16:00:00","guid":{"rendered":"http:\/\/www.osaces.com\/?p=927"},"modified":"2015-11-18T00:00:00","modified_gmt":"2015-11-17T16:00:00","slug":"jinliyuchishuizhihaohuaidezhongyaobiaozhun-rongyangliang-2","status":"publish","type":"post","link":"http:\/\/www.osaces.com\/pt\/jinliyuchishuizhihaohuaidezhongyaobiaozhun-rongyangliang-2\/","title":{"rendered":"Oxig\u00e9nio dissolvido - um crit\u00e9rio importante para a boa qualidade da \u00e1gua nos viveiros de carpas"},"content":{"rendered":"

Oxig\u00e9nio dissolvido - um crit\u00e9rio importante para a boa qualidade da \u00e1gua nos viveiros de carpas<\/span><\/strong><\/p>\n

 <\/span><\/strong><\/p>\n

A quantidade de oxig\u00e9nio dissolvido na \u00e1gua \u00e9 um indicador importante da boa ou m\u00e1 qualidade da \u00e1gua, que afecta diretamente o crescimento saud\u00e1vel dos peixes. Os peixes respiram oxig\u00e9nio atrav\u00e9s das guelras para manter a respira\u00e7\u00e3o e o metabolismo. Quando o oxig\u00e9nio dissolvido \u00e9 insuficiente, afecta facilmente as actividades fisiol\u00f3gicas normais dos peixes e, em casos graves, pode mesmo p\u00f4r em risco a vida dos peixes. Ao mesmo tempo, as subst\u00e2ncias nocivas aumentam drasticamente na \u00e1gua com pouco oxig\u00e9nio dissolvido, provocando doen\u00e7as nos peixes.<\/span><\/p>\n

 <\/span><\/p>\n

Geralmente, o n\u00edvel de oxig\u00e9nio dissolvido na \u00e1gua \u00e9 baixo \u00e0 meia-noite ou de madrugada. Quando o n\u00edvel de oxig\u00e9nio dissolvido \u00e9 inferior a 5mg\/L, o peixe sente falta de ar e a cabe\u00e7a flutua. Alguns dados mostram que o teor de di\u00f3xido de carbono na \u00e1gua \u00e9 mais de 70 vezes superior ao do ar, enquanto o teor de oxig\u00e9nio no ar \u00e9 20-30 vezes superior ao da \u00e1gua. S\u00f3 atrav\u00e9s das trocas gasosas \u00e9 poss\u00edvel trazer o oxig\u00e9nio do ar para a \u00e1gua e libertar o di\u00f3xido de carbono. Ent\u00e3o, o que pode ser feito para aumentar a quantidade de oxig\u00e9nio dissolvido na \u00e1gua?<\/span><\/p>\n

 <\/span><\/p>\n

(1) Sistemas de filtragem n\u00e3o fechados<\/span><\/strong><\/p>\n

A filtragem lateral, a filtragem de fundo, a filtragem de topo, etc., podem ser expostas ao ar, atrav\u00e9s do ciclo de oxig\u00e9nio para a piscina de peixes, o que aumenta o processo de nutrientes dissolvidos. Se a densidade de alimenta\u00e7\u00e3o da piscina for demasiado grande, pode adicionar mais bombas de ar para oxigena\u00e7\u00e3o.<\/span><\/p>\n

 <\/span><\/p>\n

(2) Sistema de filtragem fechado<\/span><\/strong><\/p>\n

Com um sistema de filtragem como um balde, a \u00e1gua no balde deve ter um contacto limitado com o ar e a filtragem tamb\u00e9m \u00e9 fechada, pelo que a \u00fanica forma de aumentar o oxig\u00e9nio dissolvido \u00e9 adicionando uma bomba de ar.<\/span><\/p>\n

 <\/span><\/p>\n

(3) As altera\u00e7\u00f5es da \u00e1gua podem n\u00e3o aumentar necessariamente a quantidade de oxig\u00e9nio dissolvido<\/span><\/strong><\/p>\n

A \u00e1gua deve ser retida antes da mudan\u00e7a de \u00e1gua. No processo de reten\u00e7\u00e3o da \u00e1gua, n\u00e3o s\u00f3 o g\u00e1s cloro \u00e9 volatilizado, mas tamb\u00e9m parte do oxig\u00e9nio na \u00e1gua. E a \u00e1gua do tanque de peixes, em circunst\u00e2ncias normais, o oxig\u00e9nio dissolvido deve ser superior ao oxig\u00e9nio dissolvido da \u00e1gua que acabou de ser retida. Portanto, mudar a \u00e1gua n\u00e3o resolve necessariamente o problema da falta de oxig\u00e9nio dissolvido, a oxigena\u00e7\u00e3o \u00e9 a chave.<\/span><\/p>\n

 <\/span><\/p>\n

(4) Rela\u00e7\u00e3o entre o oxig\u00e9nio dissolvido e o ambiente<\/span><\/strong><\/p>\n

Quando falta a eletricidade, a primeira coisa a fazer \u00e9 parar a alimenta\u00e7\u00e3o para reduzir o consumo de oxig\u00e9nio. Se for no inverno, a temperatura mais baixa que os peixes s\u00f3 podem tolerar \u00e9 o ponto de partida, n\u00e3o h\u00e1 necessidade de se apressar a utilizar outras formas de aquecimento r\u00e1pido; pelo contr\u00e1rio, se for no ver\u00e3o, a falta de energia, utilizar alguns m\u00e9todos para reduzir a temperatura da \u00e1gua, pelo que se recomenda ter uma pequena bomba de oxig\u00e9nio em casa.<\/span><\/p>\n

 <\/span><\/p>\n

(5) Rela\u00e7\u00e3o entre o material filtrante e o n\u00edvel de oxig\u00e9nio dissolvido<\/span><\/strong><\/p>\n

A adi\u00e7\u00e3o de meios filtrantes porosos \u00e9 ben\u00e9fica para a cultura de bact\u00e9rias nitrificantes, uma vez que o aumento da \u00e1rea sobre a \u00e1gua pode aumentar a quantidade de oxig\u00e9nio dissolvido na \u00e1gua.<\/span><\/p>\n

(6) Funcionamento regular para reduzir a deple\u00e7\u00e3o de nutrientes dissolvidos nos tanques de peixes<\/span><\/strong><\/p>\n

Alimenta\u00e7\u00e3o a intervalos regulares e pequenas refei\u00e7\u00f5es para reduzir a produ\u00e7\u00e3o de di\u00f3xido de carbono e subst\u00e2ncias nocivas; tratamento atempado de res\u00edduos alimentares e fezes no fundo da piscina, mudan\u00e7as regulares de \u00e1gua podem reduzir diretamente o amon\u00edaco, os nitritos e outras subst\u00e2ncias nocivas, o que, por sua vez, reduz o consumo de oxig\u00e9nio dissolvido.<\/span><\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

<\/p>","protected":false},"excerpt":{"rendered":"

A qualidade da \u00e1gua do lago de carpas \u00e9 um crit\u00e9rio importante - a quantidade de oxig\u00e9nio dissolvido A quantidade de oxig\u00e9nio dissolvido na \u00e1gua \u00e9 um crit\u00e9rio importante para identificar a qualidade da \u00e1gua [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[131,126],"tags":[162,163,164,165,166,167,168],"yoast_head":"\n\u9526\u9ca4\u9c7c\u6c60\u6c34\u8d28\u597d\u574f\u7684\u91cd\u8981\u6807\u51c6-\u6eb6\u6c27\u91cf - \u5965\u5229\u4ed5\uff08\u5e7f\u5dde\uff09\u5eb7\u4f53\u8bbe\u5907\u6709\u9650\u516c\u53f8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.osaces.com\/pt\/jinliyuchishuizhihaohuaidezhongyaobiaozhun-rongyangliang-2\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u9526\u9ca4\u9c7c\u6c60\u6c34\u8d28\u597d\u574f\u7684\u91cd\u8981\u6807\u51c6-\u6eb6\u6c27\u91cf - 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