enlarge legume forage planting areas , at the same time ,the system of farmland introduced forage plant. Considering the need of nutrition of livestock growth , using digestible energy (DE) and digetible crude protein (DCP) as standard .

• 考虑家畜正常生长发育的营养需要，以消化能(DE)和可消化粗蛋白质(DCP)为指标，计算了坝上地区饲料资源在目前载畜量下实行全年舍饲的营养满足率和载畜量。