Hadsell D L, Sommerfeldt J L
Dairy Science Department, South Dakota State University, Brookings 57007-0647.
J Dairy Sci. 1988 Mar;71(3):762-72. doi: 10.3168/jds.S0022-0302(88)79616-2.
Thirty lactating Holstein cows were randomly assigned to one of three diets to evaluate chickpeas as dietary supplement from wk 4 to 16 postpartum. Diets contained chickpeas at 0, 50, and 100% of the concentrate DM in place of corn and soybean meal. Total mixed diets, fed individually, contained concentrate, corn silage, and alfalfa hay at 52, 32, and 16% of DM. Milk yield (34.5, 35.1, 35.7 kg/d) was higher for cows fed 100% chickpeas than 0% chickpeas. Milk medium-chain (C12 to C16) fatty acids (53.8, 48.6, 45.5 g/100 g fat), milk long-chain (C18) fatty acids (29.4, 35.0, 38.8 g/100 g fat), and milk protein (3.20, 3.09, 2.96%) differed for all three diets. Ruminal acetate: propionate (2.0, 2.0, 2.4) was highest for cows fed 100% chickpeas. Total essential amino acid concentration in blood serum (105.3, 95.9, 89.4 mumol/dl) was higher for cows fed 0% chickpeas than 100% chickpeas. Lactational responses are discussed with respect to increased intake of fat, increased degradability of dietary protein, and decreased plasma essential amino acids.
30头泌乳期荷斯坦奶牛被随机分配到三种日粮中的一种，以评估鹰嘴豆作为产后第4周到第16周日粮补充剂的效果。日粮中鹰嘴豆分别替代0%、50%和100%的精料干物质中的玉米和豆粕。单独饲喂的全混合日粮中，精料、玉米青贮和苜蓿干草分别占干物质的52%、32%和16%。饲喂100%鹰嘴豆的奶牛产奶量（34.5、35.1、35.7千克/天）高于饲喂0%鹰嘴豆的奶牛。三种日粮的牛奶中链脂肪酸（C12至C16）（53.8、48.6、45.5克/100克脂肪）、牛奶长链脂肪酸（C18）（29.4、35.0、38.8克/100克脂肪）和牛奶蛋白质（3.20%、3.09%、2.96%）均有所不同。饲喂100%鹰嘴豆的奶牛瘤胃乙酸：丙酸比值（2.0、2.0、2.4）最高。饲喂0%鹰嘴豆的奶牛血清中总必需氨基酸浓度（105.3、95.9、89.4微摩尔/分升）高于饲喂100%鹰嘴豆的奶牛。本文讨论了与脂肪摄入量增加、日粮蛋白质可降解性增加以及血浆必需氨基酸减少相关的泌乳反应。
