养殖与饲料2026，Vol.25Issue(8)：35-39,5.DOI:10.13300/j.cnki.cn42-1648/s.2026.08.008
林下桑叶-蛋鸡生态养殖模式下鸡蛋的营养特性分析
Nutritional characteristics of eggs from laying hens ecologically farmed with the mulberry leaves under the forest
摘要
Abstract
[Objectives]The nutritional characteristics of eggs from laying hens ecologically farmed with mulberry leaves under the forest in southern hilly areas were studied to provide a basis for evaluating the qual-ity of products from ecological poultry and promoting the mode of ecological farming.[Methods]Roman pow-der laying hens aged 180 days were used to set up 2 groups including the ecological farming group under the forest with free-range under the forest plus fermented feed of mulberry leaves accounting for 15%of the dry matter in the supplementary feed and the traditional cage farming group with three-tiered stepped cages and fed with standard diet.Each group consisted of 3 replicates,with 200 laying hens per replicate and the experimental period of 120 days.The content of routine nutritional components,lipid quality,vitamins and minerals,func-tionally active substances including total polyphenols and total flavonoids,cholesterol,composition of amino acid,and indexes of egg quality including the strength of eggshell,yolk color,Haff units,etc.were measured.[Results]The content of crude protein in eggs from laying hens in the ecological farming group significantly in-creased(P＜0.01),the yolk ratio and the strength of eggshell significantly increased,and the yolk color signifi-cantly deepened(P＜0.01)compared with that in eggs from laying hens in the traditional cage farming group.The content of cholesterol significantly reduced by 22.8%(P＜0.01).The content of ω-3 fatty acid increased by 81.4%(P＜0.01),with the ω-6/ω-3 ratio optimized to 12.3.The content of total polyphenols and flavonoids eggs from laying hens in the ecological farming group was 2.1 times and 1.8 times higher than that in eggs from laying hens in the traditional cage farming group(P＜0.01),respectively.The content of vitamin E,selenium,zinc,and essential amino acids significantly increased(P＜0.01),with the score of lysine and methionine reach-ing 1.45 and 1.23,respectively.[Conclusions]The mode of ecologically farming laying hens with mulberry leaves under the forest can significantly increase the content of nutritional components in eggs,improve the composition of fatty acids and the balance of amino acids,reduce the content of cholesterol,enhance the strength of eggshell and yolk color.关键词
南方丘陵区/林下养殖/桑叶/蛋鸡/发酵饲料/营养特性Key words
southern hilly area/farming under forest/mulberry leaf/laying hen/fermented feed/nutri-tional characteristics引用本文复制引用
郑玉琳,刘莎莎..林下桑叶-蛋鸡生态养殖模式下鸡蛋的营养特性分析[J].养殖与饲料,2026,25(8):35-39,5.基金项目
湖南省教育厅科学研究项目(24C1199)"林下生态养殖模式下桑叶利用效率与鸡蛋营养价值关系的研究" （24C1199）
