摘要
Eight multiparous Holstein cows averaging 503 kg of body weight and 61 days in milk were used in a double 4 × 4 Latin square design with 20-day experimental periods to determine effects of feeding extruded versus non-extruded soybeans treated, or not, with 30 g/kg lignosulfonate on apparent whole tract digestibility, feed intake, milk production, milk composition, and milk fatty acid profile. Milk yield (20.8 kg/day) was similar among treatments, but cows fed extruded soybeans tended to have lower digestibilities of dry matter (DM), neutral detergent fiber (aNDF), and acid detergent fiber (ADF) than those fed non-extruded soybeans. Lignosulfonate had no effect on digestibilities of DM, ether extract, CP, and aNDF. Feeding extruded versus non-extruded soybeans decreased (Pcis9, trans11 CLA, and polyunsaturated fatty acids tended (P=0.08 and 0.06, respectively) to increase with lignosulfonate treatment of full-fat soybeans. Results suggest that it is possible to modify milk fatty acid composition by feeding extruded full-fat soybeans, but that lignosulfonate treatment has little effect on milk fatty acid profile.
摘要译文
在双倍4×4拉丁方设计中使用503kg体重和在牛奶中61天，使用20天的实验期间来确定喂养挤压与未挤压大豆处理的效果，或30g / kg木质素磺酸盐对表观全消化率，采食量，产奶量，乳成分和乳脂肪酸分布的影响。牛奶产量（20。8公斤/天）在处理中是相似的，但喂食挤压大豆的母牛往往具有较低的干物质（DM），中性洗涤纤维（aNDF）的消化率，和酸性洗涤剂纤维（ADF）比那些喂食非挤压大豆。木质素磺酸盐对DM，醚提取物，CP和aNDF的消化率没有影响。饲喂挤压大豆和非挤压大豆（Pcis9，trans11CLA和多不饱和脂肪酸呈下降趋势（P \x3d 0.08和0.06，分别）增加木质素磺酸盐处理全脂大豆。结果表明，通过喂食挤出的全脂大豆可以改变牛奶脂肪酸组成，但木质素磺酸盐处理对牛奶脂肪酸分布影响不大。
C.A.Neves[a][1];G.T.Santos[a][2];M.Matsushita[b];E.M.Alves[a];R.L.Oliveira[c];A.F.Branco[a];D.C.Silva[a];A.C.Furlan[a];H.V.Petit[d];. Intake, whole tract digestibility, milk production, and milk composition of Holstein cows fed extruded soybeans treated with or without lignosulfonate[J]. Animal Feed Science and Technology, 2007,134(1-2): 32-44