动物营养学报Issue(8)：2414-2422,9.DOI:10.3969/j.issn.1006-267x.2015.08.013
饲粮中性洗涤纤维水平对泌乳高峰期奶牛生产性能、营养物质表观消化率及血清指标的影响
Effects of Neutral Detergent Fiber Levels in Diet on Milk Performance, Nutrient Apparent Digestibility and Serum Indices of Dairy Cows during Peak Lactation Period
摘要
Abstract
This experiment was conducted to investigate the effects of neutral detergent fiber ( NDF) levels in diet on milk performance, nutrient apparent digestibility and serum indices of dairy cows during peak lactation period. Eight Holstein dairy cows [(50±15) days in milk] were selected in a 4×4 Latin square design. The NDF level in diets was 25.05%, 28.05%, 31.22% and 34.19%, respectively. The experiment had 4 periods with 21 days per period, and each period had 14 days for pre-test and 7 days for formal test. The results showed as follows:1) with the increase of NDF level in diet, the dry matter intake, milk yield, lactose yield, milk protein yield and nitrogen efficiency decreased linearly ( P<0.05); milk fat percentage and milk urea ni-trogen concentration increased linearly ( P<0.05);feed efficiency and milk fat yield tended to increase linearly ( P=0.05); milk protein percentage tended to decrease linearly ( P=0.08);while 4% fat corrected milk yield and lactose percentage were not significantly influenced ( P>0.05) . 2) With the increase of NDF level in diet, the apparent digestibility of NDF and acid detergent fiber increased linearly ( P<0.05) . 3) With the increase of NDF level in diet, serum glucose and insulin concentrations reduced linearly ( P<0.05); serum non-esterified fatty acids, β-hydroxybutyrate and urea nitrogen concentrations increased linearly ( P<0.05); serum triglycer-ide ( P=0.06) and cortisol concentrations ( P=0.07) tended to increase linearly, but total cholesterol concen-tration was not significantly influenced ( P>0.05) . In conclusion, both the 25.05% NDF and 34.19% NDF in diet have negative influence on energy-nitrogen utilization and milk performance, while the 28.05% NDF level can be more reasonable for nitrogen utilization and better milk performance than 31.22% NDF. It is suggested that the supplemental level of NDF be 28.05% for dairy cows in the peak lactation period.关键词
荷斯坦奶牛/中性洗涤纤维/生产性能/营养物质表观消化率/血清指标Key words
Holstein dairy cows/NDF/milk performance/nutrient apparent digestibility/serum indices分类
农业科技引用本文复制引用
史仁煌,董双钊,付瑶,王雅晶,曹志军,李胜利,赵国琦..饲粮中性洗涤纤维水平对泌乳高峰期奶牛生产性能、营养物质表观消化率及血清指标的影响[J].动物营养学报,2015,(8):2414-2422,9.基金项目
国家奶牛产业技术体系 （）
