Effects of different nutrition levels in total mixed rations on production performance, apparent digestibility, and slaughter performance in yard feeding lambs Effects of flax seed on beef quality and fatty acids in fattening cattle Mechanisms and effects of agro-pastoral system coupling in the Inner Mongolian ecotone Effects of Different Forms of Fattening Ways on Lamb Performance and Carcass Characteristics. Calculation for economic and ecological benefits of yak and sheep fattening in shed in Changjiang-Yellow Rivers Source Region—A case study from Maqin County,Qinghai Province