检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]河北职业技术师范学院动物科学系,河北昌黎066600
出 处:《动物科学与动物医学》2002年第5期40-43,共4页Animal Science & Veterinary Medicine
摘 要:饲粮中微量元素的含量及其配比不仅影响着蛋鸡早期的生长、发育 ,还影响到产蛋期的生产性能 ,间接地影响到禽蛋的品质 ,进而影响到消费者的利益。本研究从蛋鸡生产的三个阶段饲粮中微量元素 Fe、Cu、Zn、Mn、Se和 I的最佳供应量及其配比进行研究 ,明显地改善鸡群的健康 ,产蛋率提高了 2 .4 2 % ,产蛋高峰期后延 2 3d。The quantity and proportion of micromineral in diet affect both the growth of chicken and performance of layer, as well as quality of egg and consumershealth.this experiment was conducted to study the optimum requirement of trace element containing Fe,Cu,Zn,Mn,Se and I on layers during three periods.The result showed that egg productivity was increased 2.42% and the times of egg production peak was prolonged 23d.the health of brids were significantly improved by using the additive.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.117