影響生產性能的核心因素是營養的攝入，而不是體重。

    1、產蛋高峰期的關鍵點

ruguozaimeiyouguangzhaodecijixia，geijiqunweideguoduo，jiangduijiqunchanshengfumiandeyingxiang。guangzhaocijiduiyuchenggongdesiyangguanlishiyigeyingxiangyinsu，danshiyexuyaotongguozhibiaoduiyingyangsherukongzhiyizhidaochandangaofeng。mujiduiguangzhaocijidefankuiyouyangzhihuanjingsuojueding。zaiguangzhaohou，kongzhiyingyangdesherushizhuyaodeshouduanququedingjizhideshengchangxiaoguo。rujindesiyangweiliaoyaobushiyouyudaixienengliang，zeguodugonggeilemujiyingyang
，yincinengliangxianzhileyingyang。jiqunzouxiangchandangaofengdeshihouyaotigonggengduodeyingyang
，danshiyouyuyaozengjiachandanlverdaozhidetizhongzengjiahuiyinqisiwanglvzenggaohezongchandangeshudejianshao。ruguonengliangsheruchaochulejideyanghuanengli，zehuizhuanhuachengluankuai，daozhisiwanglvtigaohebubiyaodeyingji。

2、肌肉質量的關鍵組成

體重是衡量母雞性能的粗略指標。母雞的瘦肉質量是一個關鍵指標。在給光刺激下，最小的瘦肉要求分別是1.9KG和2.1KG。盡管肌肉質量是一個關鍵點，但典型的體重

，瘦肉率將達到2.2KG和2.3KG。如(ru)果(guo)在(zai)光(guang)照(zhao)時(shi)雞(ji)群(qun)中(zhong)有(you)一(yi)些(xie)體(ti)重(zhong)偏(pian)輕(qing)的(de)雞(ji)，對(dui)應(ying)他(ta)們(men)的(de)體(ti)重(zhong)指(zhi)標(biao)也(ye)要(yao)稍(shao)稍(shao)低(di)一(yi)些(xie)。研(yan)究(jiu)表(biao)明(ming)，少(shao)部(bu)分(fen)畜(chu)體(ti)中(zhong)的(de)脂(zhi)肪(fang)將(jiang)用(yong)於(yu)本(ben)身(shen)的(de)性(xing)成(cheng)熟(shu)。從(cong)15周的光照刺激會促進采食量的增多和體重的增加
，母雞也通過此蓄積更多的脂肪貯備來發育生殖係統。

3、光照刺激

在開始光照刺激到5%chandanlvdezhegeguochengzhong，nengliangsheruhemujicunhuolvshichengfanbi。jiashejirouzhongliangzaiguangzhaocijishiyijingdadaozhengchangshuipin，namemujizaicijieduanzhixuyaoxiangduishaodenengliangzengchang。bingqieciqijianruyoupiancha，yebushijiuzhengpianchadehaoshiji。ruguojiqunmeiyoudadaoguangzhaocijidetiaojian，namezuihaoshinengyanchiguanzhaoshijian，erbushizaiguangzhaocijihoujijindeweishierdadaobiaozhun。zhegejieduandezhuyaoguanzhudianshizaiyuzaizhuanqunshijianshaoyingji，yinggengzhuzhongshengzhixitongdefayuqingkuangerbushitizhongzengchang。chandangaofengqiandeguanliyaoyuanyankeyuchandangaofenghoudeguanli。bixuyangejianguantizhong，ruguotizhongchaobiaohuijiangdichandanlvhefuhualv。chandanlvmeixiajiang5%，雞群對能量的攝入需求每隻每天將減少7卡。在產蛋高峰前後，因蛋形大小
、tizhongzengjiahetizhongzengliangjianshaodengyuanyinzaochengdenengliangsheruliangyouqingweidequbie。zaijianliaoshi，zuihaonengbimiannengliangsherudejijujianshao。zhiyaogaofengsiliaoliangbushitebiegao，namekeyihuanmandejianshaosiliaoliang。ruguoxiangyaojianliaobuyingxiangchandan
，namegaofengqidesiliaoliangbixubeitiaodi。

4
、有關產蛋

雞群最關鍵的時期是在光照前期，這一期間有5個月時間（也就是育成期），在zai此ci期qi間jian雞ji群qun將jiang受shou很hen多duo因yin素su將jiang影ying響xiang。對dui這zhe一yi時shi期qi的de分fen析xi變bian得de極ji為wei重zhong要yao。如ru果guo把ba這zhe個ge育yu成cheng期qi分fen成cheng幾ji個ge時shi期qi則ze會hui相xiang對dui容rong易yi的de進jin行xing管guan理li，能neng量liang攝she入ru和he肌ji肉rou增zeng長chang與yu產chan蛋dan性xing能neng有you密mi不bu可ke分fen的de聯lian係xi。而er體ti重zhong在zai此ci期qi間jian則ze不bu會hui起qi到dao那na麼me大da的de作zuo用yong。有you限xian的de粗cu纖xian維wei和he氨an基ji酸suan攝she入ru隻zhi是shi在zai雞ji苗miao生sheng長chang的de最zui早zao幾ji周zhou之zhi內nei。增zeng加jia粗cu纖xian維wei的de攝she入ru量liang會hui提ti高gao雞ji群qun的de均jun勻yun度du但dan也ye會hui增zeng加jia體ti重zhong。但dan前qian期qi過guo重zhong的de體ti重zhong將jiang會hui造zao成cheng後hou期qi的de更geng嚴yan格ge的de限xian飼si。從cong雞ji隻zhi個ge體ti的de觀guan點dian來lai看kan，最zui好hao是shi在zai前qian期qi體ti重zhong偏pian輕qing，然ran而er後hou期qi限xian飼si可ke以yi相xiang對dui寬kuan鬆song。對dui整zheng群qun而er言yan
，在zai正zheng群qun均jun勻yun度du和he體ti重zhong之zhi間jian要yao找zhao到dao一yi個ge平ping衡heng點dian。有you一yi個ge誤wu區qu，雞ji隻zhi過guo早zao的de達da到dao較jiao重zhong的de骨gu骼ge肌ji肉rou將jiang會hui在zai光guang照zhao刺ci激ji下xia變bian得de更geng重zhong。事shi實shi上shang
，母mu雞ji在zai4周齡的時候
，發育的肌肉隻有成熟後骨骼肌肉總量的5%。並且後期的生長會對體型產生更大的變化。從10周到14周(zhou)的(de)能(neng)量(liang)攝(she)入(ru)將(jiang)對(dui)雞(ji)群(qun)性(xing)能(neng)起(qi)到(dao)非(fei)常(chang)重(zhong)要(yao)的(de)作(zuo)用(yong)。研(yan)究(jiu)表(biao)明(ming)，在(zai)此(ci)期(qi)間(jian)提(ti)高(gao)能(neng)量(liang)的(de)攝(she)入(ru)將(jiang)促(cu)進(jin)產(chan)蛋(dan)而(er)並(bing)非(fei)體(ti)重(zhong)增(zeng)長(chang)。雖(sui)然(ran)體(ti)重(zhong)增(zeng)長(chang)與(yu)能(neng)量(liang)攝(she)入(ru)成(cheng)正(zheng)相(xiang)關(guan)，但(dan)此(ci)時(shi)能(neng)量(liang)攝(she)入(ru)比(bi)控(kong)製(zhi)體(ti)重(zhong)更(geng)重(zhong)要(yao)。在(zai)此(ci)期(qi)間(jian)（10到14周），能量需求至少增加7卡每隻每天。如果體重低於標準，則每天每隻的能量增長需高於7卡。當體重超標時
，也應當保證最低量。因此要求對過重體重雞群的控製要在10周齡之前。

5、能量攝入主要因素