The effects of feeding supplementation on the nutritional quality of milk and cheese from sheep grazing on dry pasture

The effect of feeding supplementation on the nutritional characteristics of milk and cheese was studied in dairy sheep grazing on low mountain dry-grasslands during summer in typical sub-Mediterranean conditions of aridity. The control group (CG) of 25 sheep grazed on grass, while the experimental group (EG) of 25 sheep grazed on grass and received 600 g a day of a barley and corn mixture. Daily milk production showed a less pronounced decrease in EG than in CG (p ˂ 0.0368). After one month of supplementation, the concentrations of retinol and α-tocopherol in milk and cheese from EG were higher than CG (p

本研究在典型亚地中海干旱气候环境下开展，针对夏季于低山干旱草原放牧的奶绵羊，探究了饲料补饲对羊奶及羊奶酪营养特性的影响。对照组（CG，control group）共25只奶绵羊仅进行草地放牧；试验组（EG，experimental group）同样为25只奶绵羊，在草地放牧的基础上每日补饲600g大麦玉米混合饲料。试验组的日产奶量下降幅度显著小于对照组（p<0.0368）。补饲1个月后，试验组羊奶及羊奶酪中的视黄醇与α-生育酚含量均高于对照组（p