Effects of feeding peas to high-producing dairy cows
Effects of feeding peas to high-producing dairy cows
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DOI：
10.4141/cjas95-092
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发表时间：
1995-12-01
影响因子：
1
通讯作者：
Goonewardene, LA
中科院分区：
文献类型：
--
作者：
Corbett, RR;Okine, EK;Goonewardene, LA
在 66 头荷斯坦奶牛中研究了用豌豆替代大豆和双低菜粕作为蛋白质来源对高产奶牛群的影响，这些奶牛根据泌乳阶段、胎次、产奶水平和产奶天数分为两组。根据现有饲料的营养分析，配制了两种 18.5% 粗蛋白谷物浓缩日粮。对照谷物混合物含有标准蛋白质来源，主要是大豆和双低菜粕 (SBM\CM)，而测试谷物混合物配制为含有约 25% 豌豆作为主要蛋白质来源。两种谷物口粮均按照相同的营养规格配制，并平衡不可降解的蛋白质。试验持续 6 个月，期间根据产奶量每月调整谷物饲喂水平。对于泌乳早期的奶牛，饲喂豌豆浓缩物的奶牛 (31.3 kg d(-1)) 4% 脂肪校正产奶量比饲喂 SBM/CM 补充剂的奶牛 (29.7 kg d(-1)) 更高 (P < 0.05)。泌乳中期和晚期奶牛的脂肪校正产奶量不受蛋白质来源的影响。当分析中包括所有泌乳阶段的奶牛时，饲喂 SBM/CM 的奶牛与饲喂豌豆补充剂的奶牛相比，脂肪校正产奶量没有差异 (P > 0.05)。饲喂豌豆补充剂的哺乳早期和中期奶牛的乳脂百分比显着较高（P < 0.05）。结果表明，豌豆可以替代SBM\CM作为高产奶牛的蛋白质来源。
The effect of substituting peas for soybean and canola meals as a protein source in a high-producing dairy herd was studied in 66 Holstein cows, divided into two groups based on stage of lactation, parity, level of milk production and days in milk. Two 18.5% crude protein grain concentrate diets were formulated based on the nutrient analyses of the forages available. The control grain mix contained standard protein sources, principally soybean and canola meal (SBM\CM) while the test grain mix was formulated to contain approximately 25% field peas as the major source of protein. Both grain rations were formulated to the same nutrient specifications and balanced for undegradable protein. The duration of the trial was 6 mo during which grain feeding levels were adjusted monthly based on milk yield. For cows in early lactation, 4% fat-corrected milk yield was higher (P < 0.05) for cows fed pea based concentrates (31.3 kg d(-1)) than for cows fed SBM/CM supplement (29.7 kg d(-1)). Fat-corrected milk yield was not affected by source of protein in mid- and late-lactation cows. Fat-corrected milk production was not different (P > 0.05) for cows fed SBM/CM compared with cows fed the pea supplement when cows across all stages of lactation were included in the analyses. Milk fat percent was significantly higher (P < 0.05) for early- and mid-lactation cows fed the pea supplement. The results suggest that peas can be substituted for SBM\CM as a protein source for high-producing dairy cows.