想要養好羅氏沼蝦?那你這篇文章一定要看!

         

隨著現代農村經濟的不斷發展,養殖品種也在逐漸的擴大和優化,羅氏沼蝦對池塘的要求不是太高,一般的養魚的池塘都可以養蝦,包括提水養殖、稻田養殖,但池塘條件是高產高效的基礎。只有熟練的掌握這項技術,才可以很好的提高養殖戶的產量和收益,從而帶動整個地區經濟的發展。基于此,文章就羅氏沼蝦池塘養殖技術要點進行簡要的分析。?

一、羅氏沼蝦

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二、羅氏沼蝦的池塘養殖技術

1.蝦池建造?

LUOSHIZHAOXIADESHENGCHANGSHIWENWEI25~32℃,YAOQIUSHUITIRONGYANGBUDIYU4HAOKE/SHENG,MEI2~3MU(1MU=667PINGFANGMI)SHUIMIANPEIBEIYITAIXIELUNSHIZENGYANGJI;pHZHIYI7.5~8.5WEIJIA;TOUMINGDUYI30~40LIMIWEIYI。DIZHIYIRANGTUHUONIANTUWEIHAO。XIACHIMIANJIYI5~10MUWEIYI,CHISHEN2~1.5MI,GOUSHEN2MIYISHANG,CHIKUAN40~60MI,CHANGKUANBIWEI(4~6)1。JIN、PAISHUIFANGBIAN。?

2.設施安裝?

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3.養殖配套技術?

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其次,應當堅持科學的投飼,其是混養取得低耗、高產、增效的重要基礎。主要依據水溫、天氣以及各養殖品種的生長情況來靈活的掌握。從而保證無飼料浪費,將餌料的利用率提高。在高溫季節不可以全部投喂動物性飼料,特別是動物蛋白的飼料投喂。在上午溶氧充足的情況下可投喂動物性飼料,傍晚補充一些顆粒飼料,以吃八成飽為好。嚴格注意每天餌料的投喂量,每天觀察投喂的餌料是否吃完,如有剩余,應及時撈出,否則將會破壞水質,產生病菌,致使羅氏沼蝦生病。

螺螄既是羅氏沼蝦的天然餌料,又能吸收塘底腐生營養,清潔池塘,改善濃濁水質,每畝可投放200~300斤餌料。鈣在羅氏沼蝦生長過程中起到至關重要的作用,在羅氏沼蝦蛻殼高峰期應及時補充水體總硬度,可用納米氧+特力鈣(1+1用4畝)混成顆粒狀均勻撒在塘里,補充蛻殼和硬殼所需要的能量和營養。如出現水色渾濁,用六抗培藻膏+乳酸寶(1+1用4畝)全塘潑灑。?

4.對水質進行科學合理的管理?

塘內應增加一些遮陽避陰的設施,如棚架、有益的漂浮植物等,減少陽光的直照,降低池塘水體溫度,讓羅氏沼蝦有個藏身休息場所。在高溫季節潑灑一些底質改良,以確保池塘氨氮、亞硝酸鹽、硫化氫等池塘指標上升,讓羅氏沼蝦有個舒適的生存環境。有增氧設備的塘口,要根據水體情況及時打開增氧機,增加水體溶氧。把塘內的水位加高,深水位達到1.8米,淺水位達到1.5米。堅持每天凌晨、中午開機增氧數小時。對精養池和高密度高產養殖池,必要時須24小時開機。條件允許的要購買水質快速測定儀,隨時監控池水的酸堿值、溶氧量、氨氮等變化。?

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5.捕撈策略?

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針對羅氏沼蝦改變生長方式的特點制訂合理的捕撈策略,可以有效提高羅氏沼蝦產量。早在1972年,日本學者Fujimura等的研究就表明,選擇性移出較大的個體,可以有效促進羅氏沼蝦的整體生長。因為羅氏沼蝦的社會制度等級森嚴,體型最大的藍螯沼蝦以及較大的黃鰲沼蝦占據著大量的空間和食物資源,明顯擠占小雄蝦的生存空間,而整個養殖雄蝦養殖群體中,小雄蝦的比例一般能達到50%。

因此小雄蝦的生長效率直接影響了沼蝦的整體養殖效益,將達到出塘規格的藍鰲沼蝦和黃鰲沼蝦及時捕撈出,釋放出食物、資源空間,小雄蝦將會得到補償性生長,有效提升了養殖產量。不論是在水箱里還是在塘口里,這樣的捕撈策略都行之有效。?

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