Gelaye S, Terrill T, Amoah E A, Miller S, Gates R N, Hanna W W
Agricultural Research Station, Fort Valley State University, GA 31030, USA.
J Anim Sci. 1997 May;75(5):1409-14. doi: 10.2527/1997.7551409x.
Studies were conducted to assess nutritional value of pearl millet grain (Pennisetum glaucum [L] R. Br.) for lactating and growing goats. Three complete diets containing either 40% corn, 40% pearl millet, or 40% corn and pearl millet mixed 1:1 (wt/wt) were balanced to contain 16% crude protein and 2.24 Mcal DE/kg on an air-dry basis. Forty-five does were blocked by kidding date and randomly assigned to diets for a 7-wk investigation. Feed intake and milk production were unaffected (P > .25) by treatment, and they averaged 2.86 and 2.47 kg daily, respectively. Thirty-three growing goats were blocked by sex and fed the same diets for 15 wk. Daily growth rate and feed to gain ratio were depressed (P < .05) by 25.4 and 19.0%, respectively, when corn was completely replaced with pearl millet. Digestion coefficients for DM, GE, CP, and NDF were reduced by over 10 percentage units with partial or complete replacement of corn by pearl millet. Ruminal acetate and ratio of acetate to propionate increased (P < .05) but butyrate, propionate, and ammonia were depressed (P < .05) with the pearl millet diets. Growing goats consumed 43 meals daily. They consumed 26.9, 32.6, 27.4, and 13.1% of their ration during the morning (0600 to 1200), afternoon (1200 to 1800), evening (1800 to 2400), and night (2400 to 0600), respectively. Pearl millet is a useful energy feed for mature, but not for growing, goats.
开展了多项研究，以评估珍珠粟（Pennisetum glaucum [L] R. Br.）谷粒对泌乳期和生长期山羊的营养价值。三种全价日粮分别含有40%玉米、40%珍珠粟或40%玉米与珍珠粟按1:1（重量/重量）混合，在风干基础上平衡至含有16%粗蛋白和2.24兆卡消化能/千克。45只母羊按产羔日期进行分组，并随机分配至各日粮组，进行为期7周的试验。各处理组的采食量和产奶量未受影响（P > 0.25），平均每日分别为2.86千克和2.47千克。33只生长山羊按性别分组，饲喂相同日粮15周。当玉米完全被珍珠粟替代时，日生长率和料重比分别降低了25.4%和19.0%（P < 0.05）。珍珠粟部分或完全替代玉米后，干物质、总能、粗蛋白和中性洗涤纤维的消化系数降低了10多个百分点。珍珠粟日粮组的瘤胃乙酸含量及乙酸与丙酸的比例升高（P < 0.05），但丁酸、丙酸和氨含量降低（P < 0.05）。生长山羊每天采食43餐。它们在上午（06:00至12:00）、下午（12:00至18:00）、傍晚（18:至24:00）和夜间（24:0至06:00）分别采食日粮的26.9%、32.6%、27.4%和13.1%。珍珠粟是成年山羊的一种有用能量饲料，但不适用于生长山羊。
