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抓住五個重點養好小龍蝦

放大字體  縮小字體 發布日期:2015-03-25  來源:中國漁業報  瀏覽次數:854029
內容摘要:  在春季里,氣溫穩步回升,在這時小龍蝦養殖戶就需要加強巡塘,當水溫達到10℃以上時,小龍蝦就會爬出洞穴覓食。此時正是養殖
   在春季里,氣溫穩步回升,在這時小龍蝦養殖戶就需要加強巡塘,當水溫達到10℃以上時,小龍蝦就會爬出洞穴覓食。此時正是養殖小龍蝦的關鍵時期,編者整理了五個重點,抓住這五個重點讓你安全度過飼養危險期。

農民信息網 www.6i47.com   加水施肥

  將池塘水位一次加足以刺激小龍蝦出洞,做到早開食、早生長;同時讓所有越冬的小龍蝦一起從洞中出來,有利于繁殖的龍蝦苗種規格整齊。

  加水后,施經發酵的雞糞、豬糞、牛糞等有機肥,每畝100公斤左右以培養豐富的浮游生物供蝦苗攝食。以后根據池塘水質肥瘦的具體情況,每個月追施一次有機肥,以保證池塘水質的穩定以及水中浮游生物維持在較高的密度。

  盡早投飼

  小龍蝦是雜食性動物,植物性和動物性餌料均可成功投放,而越冬后的小龍蝦體質相對較弱,需要大量的食物和營養來育肥和生長,因此開食后的小龍蝦最好多投喂些動物性餌料,如鮮活雜魚、螺螄等,這樣不僅能夠提高親蝦的豐滿度和成活率,還有利于親蝦繁殖幼蝦的需要,當然在投放動物性飼料的同時適當搭配一些植物性餌料,可以到到最佳的飼養效果。這時需要注意的是:此時水溫相對還是較低,小龍蝦吃食相對較少。一定要注意投飼量,由于在池蝦的數量不好估算,因此要根據天氣情況投喂,遵循晴天多喂,雨天少喂的原則,投喂量一般控制在2小時吃完為宜,早晚各投喂1次。

  3月中下旬投放螺螄,每畝投放100公斤~200公斤,以便清明前后產出一批小螺螄供幼蝦攝食。早春投放的活螺螄不可以太多,以防螺螄投放太多大量吸肥,導致池塘水質偏瘦滋生青苔而影響小龍蝦的生長,后期的養殖中可根據具體情況在6月份再補放部分螺螄。

  捕大留小降低密度

  開始喂食半個月后,為了減少小龍蝦的密度應將達上市規格的小龍蝦(抱卵的蝦不要捕)捕撈出售。建議:用網眼稍大的地籠捕撈,否則網眼太小,會將幼蝦困在籠中而影響其正常攝食生長。

  移栽水草

  小龍蝦對于早春新生的水草嫩芽十分喜食,因此,要加強飼料的投喂,減少小龍蝦對水草嫩芽的攝食,確保水草萌發生長。對于一些水草較少的塘口,4月中下旬可以在池中移植苦草、水葫蘆、水花生等水生植物,水花生移栽時要沿邊貼放。

  同一池塘中要移栽多個不同品種的水草,并且小龍蝦養殖池塘水草覆蓋面積占池塘的1/3左右為宜,以保證在整個養殖期間不脫草,分池邊、淺水區和深水區不同地方進行移栽以滿足龍蝦攝食、攀附、脫殼躲避等多方面的需求。

  日常管理

  為了檢查小龍蝦的攝食、活動情況,每應天早晚各巡塘一次,池塘是否有滲漏或有破洞逃蝦等現象,發現問題立即處理。

農民信息網  責任編輯:中國農村網,季建成
 

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