Ramsey W S, Hatfield P G, Wallace J D, Southward G M
U.S. Sheep Experiment Station, USDA, Dubois, ID 83423.
J Anim Sci. 1994 Apr;72(4):811-6. doi: 10.2527/1994.724811x.
Targhee ewes with single or twin lambs were used in four trials during early lactation through weaning to evaluate ewe milk production (MP), kilograms of lamb weaned, and forage intake by ewes and lambs. During Trial 1, ewes with lambs were individually penned, fed .45 kg of barley-ewe-1.d-1 and allowed ad libitum access to chopped alfalfa hay. Trials 2, 3, and 4 were conducted on three different types of Western range environments. Forage intake of ewes in Trials 2, 3, and 4 and of lambs in Trials 3 and 4 was estimated using chromic oxide. Estimates of milk production were obtained by hand-milking. Average lamb age was 4, 50, 78, and 106 d at the beginning of Trials 1, 2, 3, and 4, respectively. Milk production was greater (P = .01) for ewes nursing twins than for those nursing singles at d 4 and 14 in Trial 1. In Trials 2, 3, and 4, all ewes had similar (P > .18) milk production. Ewe DMI during Trials 1 and 2 was greater (P < .05) for ewes nursing twin lambs than for those nursing singles. There was no difference (P > .88) in DMI between ewes with single and those with twin lambs in Trials 3 and 4. Forage DMI by twin lambs, expressed as either kilograms.ewe-1.day-1 or percentage of lamb BW, was higher (P = .01) than intake by single lambs in Trials 3 and 4.(ABSTRACT TRUNCATED AT 250 WORDS)
在泌乳早期至断奶期间，对产单羔或双羔的塔基羊进行了四项试验，以评估母羊产奶量（MP）、断奶羔羊体重以及母羊和羔羊的采食量。在试验1中，带羔羊的母羊单独圈养，每天饲喂0.45千克大麦，母羊可自由采食切碎的苜蓿干草。试验2、3和4在三种不同类型的西部牧场环境中进行。试验2、3和4中母羊以及试验3和4中羔羊的采食量采用氧化铬进行估算。产奶量通过手工挤奶获得。试验1、2、3和4开始时，羔羊的平均年龄分别为4、50、78和106日龄。在试验1的第4天和第14天，哺乳双羔的母羊产奶量高于（P = 0.01）哺乳单羔的母羊。在试验2、3和4中，所有母羊的产奶量相似（P > 0.18）。在试验1和2中，哺乳双羔的母羊的干物质采食量（DMI）高于（P < 0.05）哺乳单羔的母羊。在试验3和4中，产单羔和双羔的母羊的DMI没有差异（P > 0.88）。在试验3和4中，双羔的牧草DMI，以千克·母羊⁻¹·天⁻¹或羔羊体重的百分比表示，高于（P = 0.01）单羔的采食量。（摘要截于250字）
