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樱桃谷鸭white-Pekin-duck 全身的白色、生长速度快的大型鸭子都是北京鸭后代,叫“Pekin-duck”,或者叫“white-Pekin-duck”,没有“樱桃谷鸭”这种说法。这是中国人为了帮助英国人推广市场,起名叫做‘樱桃谷鸭’的。英国人至今还是习惯说“樱桃谷农场养的北京鸭”。 基本信息 北京...
White Pekin duckSemen collection intervalArtificial inseminationTo determine an optimum frequency of semen collection, so as to improve the efficacy of artificial insemination techniques and selective breeding programmes in duck farming. Thirty two ejaculates were collected by abdominal massage method from ...
When day-old ducklings susceptible to duck virus hepatitis (DVH) were inoculated with a DVH classic modified-live-virus (DVH-C-MLV) vaccine (1960 isolate) on a Long Island duck farm in 5 subsequent hatches and then exposed almost simultaneously to pathogenic field virus, average mortality was ...
King D,Fan M Z,Ejeta G,et al.The effects of tannins on nutrient utilisation in the White Pekin duck[J].British Poultry Science,2000,41(5):630-639.King, D.; Fan, M.Z.; Ejeta, G.; Asem, E.K.; Adeola, O. The effects of tannins on nutrient utilisation in the White Pekin duck...
DURING the past four years the poultry department at the State Institute has been attempting to obtain some definite information in regard to the feed requirements of White Pekin ducklings during the growing period. The writer knows of no published data on this subject. It is true that a few ...
White Pekin duck in Doha Qatar ID: 1856713960 收藏 加入清单 下载版权R Underwood TIFF大小 45.6MB 格式JPG 以图搜图 大图:4608× 3456 像素·39.01 cm × 29.26 cm·300dpi·JPG 中图:1000× 750 像素·35.28 cm × 26.46 cm·72dpi·JPG 小图:500× 375 像素·17.64 cm × 13.23 cm·72dpi·JPG ...
Article: Immunization field trials in susceptible white Pekin ducklings against duck virus hepatitis with modified-liver-virus vaccines
A duck walking around White Pekin duck ,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、工商银行等数万家企业级
Flock of white domisticated duck swimming in the lake. American Pekin. Peking duck. The Pekin or White Pekin is an American breed of domestic duck. Photo taken in Bogor Indonesia. 2023.,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图