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的中央, 其高度为50cm, 上口与网箱盖网相贴, 下口浸入水下30cm, 以防投饲时浮性饲料漂出箱外。
三、鱼种放
Fry a professional purchase these breeders should fry, fry specifications should be 5 cm length frequency, physical robust, no disease without injury, and the artificial feeds feeding domestication. On the time general in late July and early August, stocking density is every square metre 50 ~ 60 tail. Before 20 PPM housed with potassium permanganate dip 10 ~ 15 min, carefully into after disinfection cages, prevent fish injury caused water mildew and other diseases.
养苗种应从专业苗种繁育场购买, 苗种体长规格应≥5cm, 体质健壮, 无病无伤, 并经人工配合饲料摄食驯化。投放时间一般在7月下旬至8 月上旬, 放养密度为每平方米50～60 尾。放养前用20ppm 高锰酸钾溶液浸洗10～15 min, 消毒后小心地放入网箱中, 防止鱼体受伤引发水霉病等疾病。
四、饲料与投饲
Feed generally USES the bass with buoyancy baits, feed protein content at 30% ~ 40%. Throw the bait should adhere to the "fixed" principle, throw the bait, at the rate to determine the size of fish, fish on the individual 100 g, according to the weight of 5% ~ 8% feed the, the individual is 200 ~ 300 g, fish weight by 2% ~ 3% feed the, the individual is 400 ~ 600 g fish weight by 0.7% ~ 1.2% feed. Water temperature 18 ~ 30 ℃ for 3 times a day at the bait, the rest of the time throw the bait every day 2 times, time can throw the bait in the morning when 8 to 9, 2-3 in the afternoon and in the evening 5-6. Feed the should feed and feed in Taiwan will keep the fish in the water in the upper on rob food, every time and into the dozens of feed, wait for the fish to after eating, shooting the second feed, prevent the dispersion of feed the water, every time to feed the fish no longer cluster rob food so far.
饲料一般采用鲈鱼浮性配合饵料, 饲料粗蛋白含量在30%～40%之间。投饵应坚持“四定”原则, 日投饵率按鱼体大小来确定,鱼个体重在100g 以下, 按体重的5%～8%投喂, 个体重在200～300 g, 按鱼体重2%～3%投喂, 个体重在400～600g 按鱼体重的0.7%～1.2 %投喂。水温18～30℃时每天投饵3 次, 其余时间每天投饵2 次, 投饵时间可在上午8- 9 时、下午2- 3 和傍晚5- 6 时。投喂时应将饲料撒在食台内让鱼在上层水面集中抢食,每次撒入几十粒饲料, 等鱼吃完后, 再投第二把饲料, 防止饲料流散沉入水中, 每次投喂以鱼不再集群抢食为止。
五、日常管理
To insist on a daily patrol box, check the web without clothing worn, prepare necessary fled, prevent DiHai biological and winds, flood, precautionary pollution accidents. Second, we need to adhere to the regular bxxj-i box, monthly regular cleaning nets clothing once, and according to the water level change, adjust the position of the cages, cages to ensure good breeding environment. When cleaning, the movement wants light, prevent silver for too much hops and injured perch. Third, we will often observed fine records, careful observation and record the movements of the fish, feeding the growth and the weather, temperature, water quality, etc, timely adjust production measures. Four to regular sampling inspection, measuring every 10 d sampling length, weight once, and timely grading points box breeding in order to adjust the quantity and throw the bait with artificial feeding the particle size and improve the utilization ratio and breeding feeding the survival rate.
一要坚持每日巡箱, 检查网衣有无破损,做好防逃、防敌害生物和防患大风、洪水、污染等意外事故发生。二要坚持定期洗箱, 每月定期清洗网衣一次, 并根据水位变化, 及时调整网箱的位置, 确保网箱养殖环境良好。清洗时动作要轻, 防止银鲈因过分跳跃而受伤。三要勤观察细记录, 认真观察和记录鱼的活动情况、摄食生长情况和天气、水温水质等情况, 及时调整生产措施。四要定期抽样检查,每10 d 取样测量全长、体重一次, 并适时分级分箱饲养, 以便调整投饵量及人工配合饵料的粒径, 提高饵料利用率和养殖成活率。
六、鱼病预防
Australia is more general high perch silver fish is strong, cages in high density breeding conditions, fish disease preventi本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。