不同类型云岭黑山羊与波尔山羊杂交效果及育肥性能研究-农业推广·养殖专业毕业论文.docx

respectively.
birth weight ofmale Ft(SB),F1 OrB)and FI(cB)were increased 25%、 %and with male of SS,WW , were increased %、 %for paring with male of
SS,WW , weight of 9 months old male crossbred were increased %、%and with male of . were increased 25%、%and %for female. fattening results show that the average daily gain(ADG)of crossbred(FI)
with supplementary WaS increased with crossbred without supplementary,and %higher than local goat with supplementary in rain seaSon—
Every lkg of live weight gained consumed ADG of crossbred
with supplementary was 1019 highcr than crossbred without supplementary,which
WaS increased to local goat with weight
increaSing lks consumed feedstuffin dry season.
eye muscle area and hot carcaSs meat of crossbred were increased %.%and %than that of local goat, Was no differences between two groups in pH,processed meat rate,muscle fibre diameter ere by meat test and analysis.
Keywords:Vullling Black Goat,Bore Goat,Crossbreeding,Fattening
云岭黑山羊b波尔山羊杂交效果及育肥件能研究
文献综述国内外肉羊业的研究现状及研究进展

,。:山羊基本上饲养在不发达国家,。中国是世界养羊大国,,均居世界第一位,分别占全世界总数的13%和22%;, 居世界第二位,,, 。全世界绵羊、 ,。中国、澳大利亚、新西兰绵羊肉产量分别为160、,分别居世界第一、第二和第三, 、。中国是世界山羊肉生产的第一大国,,印度47万吨届第二,巴基斯坦36万吨居第三。中国、、,。从1950年以来,法国、新西兰、美国将养羊业重点转向肉羊生产,英国38个羊品种全为肉羊品种,肉毛兼用品种占98%,美国占80%以上。近几年来羔羊肉生产发展迅速,在新西兰羔羊肉占羊肉总产的7005以上,法国占75%,英国占90%,美国占94%,澳大利亚占70%。
从20世纪90年代以来,全国肉羊养殖急剧升温,以内蒙、新疆、甘肃、宁夏等为代表的牧区、农牧结合区,以及以山东、河南、江苏、四川、河北等为代表的农区,肉羊生产发展迅猛。, ,绵羊数量不多,约90万只,大多数