11.2.7 Increase Oxygen
Put the young fish in the trial pool, use two oxygen-increasing machines (1.5kw/machine) the first month, four the second months, six the third month. Use the machines depending on the daily wether and water quality.
Put the young fish in the comparison pool, use two oxygen-increasing machines (1.5kw/machine) the first month, four the second months, six the third month. Use the machines depending on the daily wether and water quality.
2 Test Result and Analysis
2.1 Test Ending Time:
2009.10.7, breeding lasts for about 109 days.
2.2 Trial Pool Output
The output on September 25, 27 and 30 is totally 9500jin, 33wei per jin, the unit price is 11.5yuan per jin.
The output on October 7 is totally 3484jin, 30wei per jin, the unit price is 11.5yuan per jin.
Totally 12984jin shrimp is produced, with the unit production to be 1082jin per mu. Totally 420jin fish is produced with the unit price to be 3.50yuan per jin. Shrimp survival rate is 69.67%.
2.3对照塘捕获产量
9月26,28,30日三天一共捕获产量8000斤,规格为34尾/斤,售价11.50元/斤,10月6日于塘,捕获产量4825斤,规格为31尾/斤,售价11.50元/斤。总计虾捕获产量12825斤,亩产1026斤。鱼捕获产量410斤,售价3.50元/斤。虾成活率70.26%。
备注:苗消毒等组成如试验组:清塘400元,施肥1200元,益生素400元,百泰A2000元,虾苗3600元。一共计:7600元。塘租,人工等成本未计算在内。饲料成份见表四,价格6250元/吨。由活力宝水产饲料有限公司提供
3 Conclusion
3.1添加百泰A?1.25%投喂能增强虾体的抗病能力,试验组在养殖期间只用消毒剂杀菌一次,而对照组常有孤菌等病害发生,用消毒剂杀菌三次。
3.2能明显改善饲料的吸收水平,提高利用率,降低饲料系数,试验组饲料系数1.12比对照组1.18降低5.3%。
3.3对虾体有促长作用,试验组平均虾体为32尾/斤比对照组平均虾体为33尾/斤,增长3.1%。
3.4添加百泰A?拌料投喂虾吃料快,且有诱食效果。
3.5虽然添加百泰A?拌料会增加相应的成本,但试验组亩产1082斤比对照组亩产1026斤增长5.5%。试验组的亩利润7577元比对照组亩利润7108元增长6.6%。
3.6对照组比试验组的成活率提高1%,这可能与养殖环境,放养密度,管理水平的提高和定期投喂Vc有关。同时对提高成活率的有效办法之一是虾苗质量和前期重点培育后分塘放养。
太累了,实在不好意思,不翻了。
《鱼类增养殖学》王武 中国农业出版社,
养殖水环境化学,
新编鱼药手册,
水生动物疾病学,
水生生态学,
李爱杰 主编. 水产动物营养与饲料学. 北京:中国农业出版社,1996
这些都很好,楼允东主编《鱼类育种学》,不过理论性较强,要慢慢看。