动物营养学报2019，Vol.31Issue(10)：4784-4792,9.DOI:10.3969／j.issn.1006⁃267x.2019.10.044
饲用甜菜对泌乳奶牛生产性能、血清生化指标和营养物质表观消化率的影响
Effects of Feed Beet on Performance, Serum Biochemical Indexes and Nutrient Apparent Digestibility of Lactating Dairy Cows
摘要
Abstract
This experiment was conducted to investigate the effects of feed beet on performance, serum bio?chemical indexes and nutrient apparent digestibility of lactating dairy cows. Sixty healthy Holstein dairy cows with lactation days ( 150±19) d and milk yield ( 30.3 ±3.8) kg were randomly divided into four groups with 15 cows per group. Cows in the control group were fed a basal diet, cows in trail group Ⅰ were fed the feed beet+whole corn mixed silage replacing 100% whole corn silage and partial concentrate, cows in trail groupⅡwere fed the feed beet+alfalfa hay mixed silage replacing 30% whole corn silage and partial concentrate, and cows in trail groupⅢwere fed the fresh feed beet replacing 50% whole corn silage and partial concentrate. The pre?experimental period lasted for 15 days, and the experimental period lasted for 60 days. The results showed as follows: 1) compared with the control group, the dry matter intake of trail groupⅠ, trail groupⅡand trail group Ⅲ was significantly increased ( P＜0.05) , and the milk yield of trail group Ⅰ, trail group Ⅱ and trail group Ⅲ was increased by 1.23, 0.72 and 0.21 kg ( P＞0.05) , respectively. The milk fat percentage of trail group Ⅰ and trail group Ⅲ was significantly higher than that of control group and trail group Ⅱ( P＜0.05). There were no significant difference on milk protein percentage, lactose percentage, somatic cell count and feed efficiency among all groups ( P＞0.05). 2) The contents of non?esterified fatty acid and β?hydroxybutyric acid in serum of trail groupⅠ, trail groupⅡand trail groupⅢwere significantly lower than those of the con?trol group ( P＜0.05 ). There were no significant difference on other serum biochemical indices among all groups ( P＞0.05). 3) The dry matter apparent digestibility of trail group Ⅰ, trail group Ⅱ and trail group Ⅲwas significantly higher than that of the control group ( P＜0.05) , and the neutral detergent fibers apparent di?gestibility and acid detergent fiber apparent digestibility of trail group Ⅰ and trail group Ⅲ were significantly higher than those of the control group ( P＜0.05). 4) Compared with the control group, the feed cost of trail group Ⅰ, trail groupⅡand trail groupⅢwas decreased by 0.07, 0.03 and 0.02 RMB／kg, and gained 4.75, 0.21 and 1.77 RMB／( d·head) , respectively. In conclusion, diets supplemented with feed beet can improve the nutrient apparent digestibility and dry matter intake, tend to increase the milk yield, improve the economic benefits of farms, and have no adverse effects on the health of dairy cows.[ Chinese Journal of Animal Nutri?tion, 2019, 31(10) :4784?4792]关键词
泌乳奶牛/饲用甜菜/血清生化指标/生产性能Key words
lactating dairy cows/feed beet/serum biochemical indices/performance分类
农业科技引用本文复制引用
张子霄,张舒,卢娜,张连国,刘琼,王雅晶,李胜利,余雄..饲用甜菜对泌乳奶牛生产性能、血清生化指标和营养物质表观消化率的影响[J].动物营养学报,2019,31(10):4784-4792,9.基金项目
农产品质量安全监管(畜牧)项目(131821301092361003) （畜牧）
