资源描述：
《蛋重对种蛋失重及孵化效果的影响 毕业论文》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、蛋重对种蛋失重及孵化效果的影响摘要种蛋的孵化效果及雏鸡的品质受多种因素的影响，种蛋品质是影响孵化效果及雏鸡品质的主要因素，而蛋重是衡量种蛋品质的重要指标。本实验选择海兰59周龄种鸡群所产种蛋600枚，根据蛋重将其分为6组，每组各100枚，分别为Ⅰ组（蛋重在51g以下）、Ⅱ组（蛋重55g）、Ⅲ组（蛋重60g）、Ⅳ组（蛋重65g）、Ⅴ组（蛋重70g）和Ⅵ组（蛋重71g以上），以研究在相同孵化条件下蛋重对种蛋失重及孵化效果的影响。研究结果显示,孵化12、18天及出雏时Ⅰ组蛋重绝对失重显著低于Ⅱ、Ⅲ、Ⅳ、Ⅴ组(P﹤0.05)，极显著低于Ⅵ组(P﹤0.01)，Ⅱ、Ⅲ组显著低于Ⅵ
2、组(P﹤0.05)，其余各组间差异不显著(P﹥0.05)。种蛋在孵化前18天各组相对失重率差异不显著(P﹥0.05)，出雏相对失重率Ⅰ组显著低于Ⅱ组、Ⅲ组、Ⅳ组、Ⅴ组、Ⅵ组(P﹤0.05)。入孵蛋孵化率和受精蛋孵化率以Ⅳ组为最高，Ⅵ组最低；健雏率以Ⅱ组和Ⅲ组为最高，均为100%。结果表明，在该孵化条件下，海兰父母代种蛋的蛋重在60-70g时其孵化率最高，蛋重在55-65g其雏鸡品质最好。关键词：蛋重孵化率健雏率14TheeffectsofeggweightofbreedinglayersonweightlossandhatchabilityAbstractThehat
3、chabilityofbreedingeggsandthechicken’squalitywereaffectedbymanyfactors,eggweightisoneofthefactors.The600breedingeggsfromHighlandbrowneggshelllayersweredividedinto6groupsaccordingtoweights,ingroupⅠ(egglessemphasis51g),Ⅱgroup(eggweight55g),Ⅲgroup(eggweight60g),Ⅳgroup(eggweight65g),Ⅴgroup(
4、eggweight70g)andgroupⅥ(eggweight71gandabove),thenconductedtheexperimentshahatchingandraisinginthesameenvironment.TheresultsshowedthattheweightlossesofⅠgroupweresignificantlylowerthanⅡ,Ⅲ,Ⅳ,ⅤgroupandⅥgroup(P<0.05orP<0.01),ⅡandⅢgroupwassignificantlowerthanⅥgroup(P<0.05),when12th,18thhatchi
5、ngdays.Therateofweightlossofeachgrouphadnodifference(P>0.05)before18hatchingdays.Forthehatchingratesoftotaleggsandembryonatedeggs,Ⅳgroup’swerehighest,Ⅵgroup’swerelowest.Fortherateofhealthchicken,ⅡandⅢgroup’swerehighest.Theresultssuggestedthatthehatchingratesof60-70geggweightwerehighest,
6、thechickenqualitiesof55-70geggweightwerebest.Keywords:EggweightHatchingrateRateofhealthchicken14目录摘要……………………………………………………………………………………11、文献综述…………………………………………….…………………………….41.1我国蛋种鸡生产的现状与发展趋势…….…………....................……………41.1.1祖代种鸡生产与发展趋势..................................................
7、............................41.1.2父母代种鸡生产发展趋势 ..........................................................................41.2蛋重对孵化孵化率及雏鸡品质的影响......................…………………….....51.2.1蛋重对种蛋相对失重的影响……………………….……………………….61.2.2蛋重对雏鸡品质的影响………………….………………………………….61.3研究内容及意义…………………………………………
