This feeding trial was conducted to evaluate the potential of poultry by-product meal (PBM) as a protein source in the culture of Litopenaeus vannamei. Seven isonitrogenous and isoenergetic diets were formulated to ne...This feeding trial was conducted to evaluate the potential of poultry by-product meal (PBM) as a protein source in the culture of Litopenaeus vannamei. Seven isonitrogenous and isoenergetic diets were formulated to near to commercial diet with about 40% protein and 7.5% lipid. Fish meal was replaced by 0, 30%, 40%, 50%, 60%, 70% and 100% of PBM (diets 1-7). The diet with 100% fish meal was used as a control (diet 1). Post-larvae were reared in an indoor semi-closed re-circulating system. Each dietary treatment was tested in 4 replicate tanks (260 L) of 40 shrimp, arranged in a completely randomized design. The shrimps were hand-fed for three times a day to near-satiation (0700, 1200 and 1800) for 60 d. Percentage weight gain, survival, feed conversion ratio (FCR), protein efficiency ratio (PER) and body composition of shrimps were measured. There were no significant differences (P>0.05) in growth performance among shrimps fed diets 1-5 (0-60% fish meal replacement). However, shrimps fed diet 7 (100% fish meal replacement) had significantly lower (P<0.05) growth than those fed diets 1-5 (0-60% fish meal replacement). Shrimp fed diets 2-4 (30%-50% fish meal replacement) showed significantly higher growth than those fed diets 6 and 7 (70% and 100% fish meal replacement, respectively). Survival ranged from 94.7% to 100.0% and did not differ significantly (P>0.05) among different experimental diets. No differences in body composition were found among shrimps fed different diets. These results showed that up to 70% of fish meal protein can be replaced by PBM without adversely affecting the growth, survival, FCR, PER and body composition of Litopenaeus vannamei.展开更多
在工控安全事件频发的今天,让国内大型企业愈发重视系统安全。本文介绍了基于全国产化King Super SCADA的智慧矿山监控系统解决方案成功应用于某能源集团的信创改革项目,该方案由北京亚控科技发展有限公司(以下简称:亚控科技)自主研发,...在工控安全事件频发的今天,让国内大型企业愈发重视系统安全。本文介绍了基于全国产化King Super SCADA的智慧矿山监控系统解决方案成功应用于某能源集团的信创改革项目,该方案由北京亚控科技发展有限公司(以下简称:亚控科技)自主研发,与华为鲲鹏、奇虎360等联合,旨在替换集团原有的Kep Ware等国外软硬件工控系统,实现其网络设备、存储、安全设备、工控系统的信创改造,对其现场的生产过程形成了自动化的管控方法,对安全管理系统形成深度的数字化改造,降低现场事故风险,保障矿山安全。同时利用数据存储、数据分析形成生产计划的排产、生产数据的分析,减少人力运维成本。从整体上实现了矿山信息化、自动化的深度融合。截至目前,该方案累计应用部署达13个矿区,总产能上亿吨,为集团煤炭安全生产保驾护航。展开更多
基金financial support by grant No. 30871928 from the National Natural Science Foun-dation of China (NSFC)
文摘This feeding trial was conducted to evaluate the potential of poultry by-product meal (PBM) as a protein source in the culture of Litopenaeus vannamei. Seven isonitrogenous and isoenergetic diets were formulated to near to commercial diet with about 40% protein and 7.5% lipid. Fish meal was replaced by 0, 30%, 40%, 50%, 60%, 70% and 100% of PBM (diets 1-7). The diet with 100% fish meal was used as a control (diet 1). Post-larvae were reared in an indoor semi-closed re-circulating system. Each dietary treatment was tested in 4 replicate tanks (260 L) of 40 shrimp, arranged in a completely randomized design. The shrimps were hand-fed for three times a day to near-satiation (0700, 1200 and 1800) for 60 d. Percentage weight gain, survival, feed conversion ratio (FCR), protein efficiency ratio (PER) and body composition of shrimps were measured. There were no significant differences (P>0.05) in growth performance among shrimps fed diets 1-5 (0-60% fish meal replacement). However, shrimps fed diet 7 (100% fish meal replacement) had significantly lower (P<0.05) growth than those fed diets 1-5 (0-60% fish meal replacement). Shrimp fed diets 2-4 (30%-50% fish meal replacement) showed significantly higher growth than those fed diets 6 and 7 (70% and 100% fish meal replacement, respectively). Survival ranged from 94.7% to 100.0% and did not differ significantly (P>0.05) among different experimental diets. No differences in body composition were found among shrimps fed different diets. These results showed that up to 70% of fish meal protein can be replaced by PBM without adversely affecting the growth, survival, FCR, PER and body composition of Litopenaeus vannamei.
文摘在工控安全事件频发的今天,让国内大型企业愈发重视系统安全。本文介绍了基于全国产化King Super SCADA的智慧矿山监控系统解决方案成功应用于某能源集团的信创改革项目,该方案由北京亚控科技发展有限公司(以下简称:亚控科技)自主研发,与华为鲲鹏、奇虎360等联合,旨在替换集团原有的Kep Ware等国外软硬件工控系统,实现其网络设备、存储、安全设备、工控系统的信创改造,对其现场的生产过程形成了自动化的管控方法,对安全管理系统形成深度的数字化改造,降低现场事故风险,保障矿山安全。同时利用数据存储、数据分析形成生产计划的排产、生产数据的分析,减少人力运维成本。从整体上实现了矿山信息化、自动化的深度融合。截至目前,该方案累计应用部署达13个矿区,总产能上亿吨,为集团煤炭安全生产保驾护航。
