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严寒未走 水产品防护不能丢

2018-02-01 16:12:43 来源:中国农机网 阅读量:26976 评论

导读:冷空气突袭,农林牧渔业都要加强防护,对于渔业来说寒冷的冬季也正是渔业生产捕捞上市的旺季,那怎样才能确保水产品安全越冬呢?

  【中国农机网 本站原创】1月30日,中央气象台继续发布寒潮蓝色预警:1月30日夜间至2月5日,受频繁南下的冷空气影响,我国中东部地区气温将持续偏低状态。黄淮、江汉、江淮、江南、华南等地的部分地区气温较常年偏低4~6℃。冷空气突袭,农林牧渔业都要加强防护,对于渔业来说寒冷的冬季也正是渔业生产捕捞上市的旺季,那怎样才能确保水产品安全越冬呢?
 
  增氧防寒。预防池塘结冰技术:在还没有结冰的池塘,每亩水面配置增氧机,24小时不间断开启增氧机,可有效预防结冰或将池塘水位提高到2米左右,加固和修补温棚,保持水质水温的稳定。;如果池塘已经结冰,且冰层较厚阳光难以射入水下,可将池塘四周3米范围内的冰砸破,让光线透入水中,可防止鱼虾缺氧。
 
  深水防寒。选择背风向阳、水深2米以上的池塘,可使鱼类安全越冬。同时越冬池水不能长期处于静止状态,通常每20~30天调换部分池水,每次换去总池水的1/4~1/5,以防止池水污染。有条件的还可利用温泉水、地下深井水等自然环境条件进行越冬。
 
  饲料投喂防寒。越冬时期饲料的投喂,应注重高蛋白质精料的添加。这样可以防止越冬鱼类体质下降,配制时应注意营养搭配,尤其是氨基酸的平衡、维生素和微量元素的充足。一般鱼类越冬期间饲料的蛋白质含量宜在25%左右,可以细糠、麸皮、豆饼、麦芽等为主,并经常搭配投喂一些绿萍、鲜嫩菜叶。
 
  除了要防寒,还要加强病害的防治。水产品因其生长生活的特定环境,在发病初期其症状往往不太明显,再加上冬季巡塘的工作粗枝大叶就更难察觉,常常会错过治理的佳时机。正确的做法应该是无病先防、防治结合。在寒潮期间,鱼虾等水产品免疫力下降,且易发三毛金藻病。因此要采取综合措施,提早预防。包括彻底清塘、鱼种消毒、定期注水和科学施肥、定期内服外治等。另外,也更要提高巡塘观察力度,认真观察水温、水质等水产品的生存环境,做好记录,确保发现问题能够及时解决。
 
  每年的一二月份大多数养殖水产品进入销售旺季,养殖户在抓住春节前的有利时机及早将水产品销售出去的同时,要充分利用捕捞、交通运输工具,将已达到商品规格的产品,及时捕捞上市,降低存塘量,避免造成更大损失。
 
  进入冬季,水产养殖基本上处于休整期,是一年养殖过程中清闲的季节,但这并不意味着这时期的工作并不重要,如果对这期间的几项工作不给予足够的重视,将会极大的影响来年的养殖效益,因此冬季水产养殖应认真抓好水产品的防护工作。
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