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小龙虾养殖技术

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小龙虾养殖技术

发布日期:2016-07-27 作者: 点击:

      龙虾苗

辽宁福彩35选7走势图       

       龙虾苗辽宁福彩35选7走势图的投放采用池塘单养的三种模式均可,在池塘散养,但尤其适合秋季放龙虾苗和春季放龙虾苗模式。肉食性优质鱼类在4 ~5 月投放在网箱内,每个平方米的网箱可投放3 ~8 厘米的鱼种100~300 尾,投放鱼类的个体规格和数量与投放的种类有关。投放的优质名贵鱼种可选择加州妒鱼、大口鳃鱼、叉尾蛔鱼、黄鳝、黄颗鱼、长吻鱿、尖塘鲤、彩虹鲷、河豚等。投放鱼种的规格应与网箱网眼的大小配套,在保证鱼种不会从网眼逃逸的前提下,网箱四周网眼应尽可能大一些,使得网箱内外水体能很好交换,网箱底部的网眼应尽可能密或者设投饵区,防止投喂的鱼饵料落人池底。鱼种投放时应注意水温的调控,并应采用5%的食盐水对鱼体做消毒处理。


  具体做法是,放养龙虾苗后与投放鱼种之前,根据水色、天气情况、小龙虾种苗的活动及摄食情况,通过给池塘投施腐熟的牛粪或草粪肥,来调节水质,保持溶解氧在5 毫克/升左右,透明度在30 ~40 厘米,一般不加水或加水较少;投放鱼种后应少施肥,一般每5 ~10 天加注次新水,每15 ~20 天泼洒一次石灰水,保持溶解氧在5 毫克/升以上,透明度在40 ~60 厘米。在晚上、阴天、气候突变时及高温季节应打开增氧机增养。此种模式的养殖要特别注意小龙虾种苗与网箱养殖鱼类的和谐,在池塘中高密度网箱养殖优质鱼易引起病害,平时可采用中药药饵及网箱中挂袋的方法治疗和预防。龙虾的养殖、投喂、操作及捕捞基本与池塘单养淡水龙虾相同。待7 月成品虾全部捕捞完后,可将网箱中的鱼投放到池塘中养殖,并加强投喂,使之当年上市。


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关键词:小龙虾种苗,淡水龙虾,龙虾苗

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