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罗氏沼虾最适生长水温23℃—30℃。在海南、广东等地,一年养两茬甚至三茬都有可能。而长江流域适应罗氏沼虾的生长期大致上只有120天左右,在这么短的生长期内要养好二茬虾,得要采取一定措施才能达到。 一、锅炉加温培育早繁苗 养殖户要选择锅炉加温培育的早繁苗,苗的规格要求在2cm以上,在5月10日前后,当水温稳定在18℃—20℃时适时放苗,有条件的养殖户最好自己用锅炉加温自己培育早繁苗,亩放早繁大苗2.5万尾。
Macrobrachium rosenii optimum temperature of 23 ℃ -30 ℃. In Hainan, Guangdong and other places, raising two or three crops a year are possible. The Yangtze River basin to adapt to the growth period of Macrobrachium r in the general only about 120 days, in such a short period of growth to keep two stubble, have to take certain measures to achieve. First, the boiler heating and breeding of early hot and sour breeds to choose boilers to cultivate the early hot seedlings, seedlings specifications required in more than 2cm, before and after May 10, when the water temperature stable at 18 ℃ -20 ℃ timely Fangmiao Conditional farmers are best to use their own boil their own heating to cultivate early seedlings, mu put the early propagation of 25,000 large seedlings.