Thirty-two lactating Boer goats (35.2 ± 1.4 kg body weight) were grouped into control and three treatment groups in completely randomised design. In treatment groups, supplementation was done as a mixture of 5 g Chlorella vulgaris + 4.5 mg of supplemental Cu/kg diet from CuSO₄ (Alg5 treatment), 10 g C. vulgaris + 9 mg of supplemental Cu/kg diet (Alg10 treatment), or a mixture of 15 g C. vulgaris + 13.5 mg of supplemental Cu/kg diet (Alg15 treatment). Treatments did not affect feed intake; however, Alg10 treatment increased (P<0.001) nutrient digestibility. Treatments did not affect ruminal pH, ammonia-N, butyrate; however, the Alg10 treatment increased (P<0.01) ruminal total volatile fatty acids, propionate and acetate concentrations. Without affecting other blood measurements, the Alg10 treatment quadratically increased (P<0.001) serum glucose and Cu. The Alg10 treatments increased (P<0.001) daily milk production and the concentration of fat, and enhanced milk (feed) efficiency. The Alg10 treatment decreased (P<0.05) milk saturated fatty acids and the atherogenic index, and increased the proportions of total conjugated linoleic acids, C18:1n9t, odd fatty acids and total unsaturated fatty acids compared with the control treatment. Present study concluded that inclusion of a mixture of 10 g C. vulgaris + 9 mg Cu/kg diet in the diet of lactating Boer goats enhanced nutrient digestibility, ruminal fermentation, milk production, feed efficiency as well as milk nutritive value. Increasing the dose of the mixture to 15 g C. vulgaris + 13.5 mg Cu/kg diet is not recommended in the diet of lactating Boer goats.

中文翻译：

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小球藻微藻和铜混合物的添加增强了泌乳波尔山羊的营养消化率和牛奶属性

将32只泌乳的波尔山羊（35.2±1.4 kg体重）分为对照组和三个治疗组，采用完全随机设计。在治疗组中，补充剂为5 g小球藻+ 4.5 mg补充Cu / kg饮食（来自CuSO _4）（Alg5处理），10 g寻常型小球藻+ 9 mg补充Cu / kg饮食（Alg10处理）的混合物或15 g寻常梭状芽胞杆菌的混合物+ 13.5 mg补充铜/ kg饮食（Alg15治疗）。处理不影响采食量；但是，Alg10处理增加了营养物质的消化率（P <0.001）。处理不影响瘤胃pH，氨氮，丁酸盐；然而，Alg10处理增加了瘤胃总挥发性脂肪酸，丙酸酯和乙酸酯的浓度（P <0.01）。在不影响其他血液测量的情况下，Alg10治疗使血清葡萄糖和Cu含量成倍增加（P <0.001）。Alg10处理增加了（P <0.001）每日牛奶产量和脂肪浓度，并提高了牛奶（饲料）效率。Alg10处理降低（P <0.05）牛奶饱和脂肪酸和致动脉粥样硬化指数，并增加总共轭亚油酸C18：1n9t的比例，与对照相比，奇数脂肪酸和总不饱和脂肪酸。本研究的结论是，包含10 g的混合物泌乳波尔山羊的日粮中添加了普通玉米+ 9毫克铜/千克，可提高营养物质的消化率，瘤胃发酵，产奶量，饲料效率以及牛奶的营养价值。不建议在哺乳期的波尔山羊饮食中将混合物的剂量增加到15 g寻常梭状芽孢杆菌+ 13.5 mg Cu / kg饮食。