Abstract The effects of feeding lucerne hay (Medicago sativa) and or barley grain to grazing reproducing Angora does on birth weight, live weight, body condition, quality and production of milk and mohair and gastrointestinal parasitism were investigated in does and kids. The design was supplementation for the last 8 weeks prepartum to 8 weeks postpartum with 5 levels of whole barley grain (GL: 0, 115, 230, 345, 460 g/d/doe) × 2 levels of hay supplementation (HL, 380 g/d/doe 8 weeks prepartum, 0 g/d postpartum; HH, 830 g/d/doe 8 weeks prepartum, 800 g/d/doe 8 weeks postpartum) × 2 randomised blocks. This provided 20 experimental plots, 10 for each level of hay and 4 for each GL. Each plot contained one dry doe, three single litter does, and one twin litter doe. Pastoral conditions were poor with low availability of green pasture until late spring. Does kidded in early August. Important results were: GL affected the birth weight of twin kids (+15%) but not of single kids; GL affected kid live weight, milk production, composition and secretion of milk solids, total mohair production and some mohair quality measures but GL increased fibre diameter and incidence of medullated fibres in kid mohair; optimum performance at day 40 of lactation was GL 345 which produced 2325 g/d milk corrected to 4% fat. HH increased secretion of milk protein and total solids compared with HL. Twin litters had greater persistence in lactation to day 100 of lactation compared with single litters. There was evidence that high levels of barley feeding reduced faecal egg count. Dry does gained more live weight, grew 26% more mohair which was 1.7 μm coarser compared with does with single litter. The results indicate that feeding lucerne hay even under adverse seasonal conditions was of little value. The lactation performance of these grazing Angora does was substantially less than their potential. Optimum barley feeding was GL 345 g/d/doe. There was evidence of substitution of pasture for hay. The results quantified the production responses and penalties of Angora does when litter size was increased from non-pregnant status (zero) to 2.

中文翻译：

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在怀孕和哺乳期的最后三分之一期间，向安哥拉补充饲喂苜蓿干草和大麦谷物，以及窝产仔数对牧场、出生体重、活重、寄生性、产奶量、牛奶成分和马海毛产量的影响

摘要 研究了饲喂苜蓿干草（Medicago sativa）和/或大麦粒对放牧繁殖的安哥拉山羊的出生体重、活重、身体状况、牛奶和马海毛的质量和产量以及胃肠道寄生虫的影响。设计是在产前最后 8 周至产后 8 周补充 5 级全麦粒（GL：0、115、230、345、460 g/d/doe）× 2 级干草补充剂（HL，380 g /d/doe 产前 8 周，产后 0 g/d；HH，产前 8 周 830 g/d/doe，产后 8 周 800 g/d/doe) × 2 个随机区组。这提供了 20 个实验地块，每个干草水平 10 个，每个 GL 4 个。每个小区包含一只干母鹿、三只单胎母鹿和一只双胎母鹿。直到晚春，牧区条件都很差，绿色牧场的可用性很低。八月初开的玩笑。重要的结果是：GL 影响双胞胎的出生体重（+15%），但不影响单胞胎的出生体重；GL 影响儿童的活重、产奶量、乳固体的组成和分泌、马海毛总产量和一些马海毛质量指标，但 GL 增加了儿童马海毛的纤维直径和有髓纤维的发生率；泌乳第 40 天的最佳性能是 GL 345，它生产 2325 g/d 的牛奶，校正为 4% 脂肪。与HL相比，HH增加了乳蛋白和总固体的分泌。与单胎相比，双胎在泌乳期到第 100 天的持续时间更长。有证据表明，高水平的大麦喂养会减少粪便中的鸡蛋数量。与单窝相比，干马海毛的活重增加了 26%，粗了 1.7 微米。结果表明，即使在不利的季节性条件下饲喂苜蓿干草也没有什么价值。这些放牧安哥拉的泌乳性能远低于它们的潜力。最佳大麦饲喂量为 GL 345 g/d/doe。有证据表明草场代替干草。结果量化了当窝产仔数从非怀孕状态（零）增加到 2 时安哥拉的生产反应和惩罚。