不同饲养方式对如草蛋鸡生产性能及鸡蛋品质的影响

Effect of Feeding Patterns on Production Performance and Egg Quality of Rucao Hens

为家禽开展生态、健康型养殖提供科学依据,选取468只19周龄体重相近的健康如草蛋鸡,进行了室内圈养+运动场放养、室内圈养2种饲养方式对如草蛋鸡生产性能及蛋品质影响的试验。结果表明:与圈养相比,放养鸡开产日龄较晚,产蛋率达5%和50%的日龄分别延迟8.33d和15.33d(P<0.01),以致全期产蛋量(P<0.05)和产蛋率(P<0.01)低于圈养鸡,且鸡蛋破损率较高(P<0.01),全期采食量则低于圈养鸡(P<0.01)。产蛋率达50%后,放养鸡的产蛋量、产蛋率和蛋料比则与圈养鸡差异不显著(P>0.05)。放养鸡鸡蛋的蛋白高度值、蛋清值低于圈养鸡(P<0.01),蛋黄颜色值、蛋壳强度高于圈养鸡(P<0.01),蛋黄重高于圈养鸡。如草蛋鸡在产蛋率达50%后进行适时放养,有利于提高蛋鸡的生产性能,降低饲料成本,提高鸡蛋品质。

In order to provide a scientific basis for ecological and healthy poultry production,468 Rucao hens in age of 19 wk with similar body weight were randomly divided to two treatment groups as indoor feeding ＋ free range and indoor feeding to evaluate the feeding patterns on production and egg quality.The results showed that the age at first egg for free range treatment was later than indoor feeding,and the age for 5％ and 50％ laying rate was delayed for 8.33 and 15.33 days,respectively,therefore egg production and laying rate for free range treatment were lower than indoor feeding,with higher egg breakage,but the feed intake was lower than indoor feeding treatment.When laying rate reached 50％,there were no significant difference on egg production,laying rate,and egg feed ratio between both treatments.The albumen height value and albumen value for free range treatment were highly significantly lower than indoor feeding treatment,but yolk color and egg shell strength were highly significantly higher than indoor feeding treatment,and yolk weight was higher than indoor feeding.It could be concluded that when laying rate reached 50 ％,free range raising could increase laying performance,decrease feeding cost,and improve egg quality for Rucao hens.