动物营养学报 >

2014 , Vol. 26 >Issue 12: 3608 - 3615

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.12.009

反刍动物营养 Ruminant Nutrition

精料干酒糟及其可溶物水平对奶牛产奶性能及氮排泄的影响

  • 孙国强 ,
  • 吕永艳 ,
  • 王玲
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  • 青岛农业大学动物科技学院, 青岛 266109

收稿日期: 2014-06-05

  网络出版日期: 2014-12-05

基金资助

山东省现代农业产业技术体系牛产业创新团队(SDAIT-12-011-08)资助

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Effects of Dried Distillers Grains with Solubles Level in Concentrate on Milk Performance and Nitrogen Excretion of Dairy Cows

  • SUN Guoqiang ,
  • LYU Yongyan ,
  • WANG Ling
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  • School of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China

Received date: 2014-06-05

  Online published: 2014-12-05

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摘要

本试验旨在研究精料中不同干酒糟及其可溶物(DDGS)水平对奶牛产奶性能及氮排泄的影响.选择30头体重、胎次、产奶量、乳成分和泌乳天数[(115±14) d]相近的健康中国荷斯坦牛,随机分为5个组,对照组精料不添加DDGS,试验Ⅰ组、Ⅱ组、Ⅲ组和Ⅳ组分别以10.0%、17.5%、25.0%和32.5%的DDGS等比例替代精料中花生粕、棉籽粕、豆粕和玉米.预试期15 d,正试期60 d.结果表明:1)干物质采食量,试验Ⅰ组、Ⅱ组、Ⅲ组及对照组显著高于试验Ⅳ组(P<0.05),而这4个组间无显著差异(P>0.05);粗蛋白质采食量,4个试验组间无显著差异(P>0.05),试验Ⅰ组、Ⅱ组与对照组之间无显著差异(P>0.05),而试验Ⅲ组和Ⅳ组显著低于对照组(P<0.05).2)日均产奶量,对照组和试验Ⅰ组、Ⅱ组、Ⅲ组整个正试期的平均值均显著高于试验Ⅳ组(P<0.05),分别比试验Ⅳ组高6.17%、8.27%、9.06%和9.59%,对照组和试验Ⅰ组、Ⅱ组、Ⅲ组间则无显著差异(P>0.05).3)对照组和4个试验组间各乳成分含量均无显著差异(P>0.05).4)4个试验组总氮排泄量整个正试期的平均值分别比对照组下降4.19%、9.36%、12.08%和18.02%,各组间均存在显著或极显著的差异(P<0.05或P<0.01).综合考虑奶牛产奶性能和氮排泄,在本试验条件下,奶牛精料中适宜的DDGS水平为25.0%.

关键词： DDGS; 产奶量; 乳成分; 氮排泄

本文引用格式

孙国强 , 吕永艳 , 王玲 . 精料干酒糟及其可溶物水平对奶牛产奶性能及氮排泄的影响[J]. 动物营养学报, 2014 , 26(12) : 3608 -3615 . DOI: 10.3969/j.issn.1006-267x.2014.12.009

Abstract

This experiment was conducted to investigate the effects of dried distillers grains with solubles (DDGS) level in concentrate on milk performance and nitrogen excretion of dairy cows. Thirty healthy Chinese Holstein cows with similar body weight, parity, milk yield, milk composition and days in lactation [(115±14) d]were divided into five groups randomly. Different levels of DDGS [0(control group), 10.0%, 17.5%, 25.0% and 32.5%]were supplemented to concentrate, respectively, replacing corresponding proportions of peanut meal, cottonseed meal, soybean meal and corn. The pre-test period was 15 days, and the test period was 60 days. The results showed as follows: 1) dry matter intake, control group and test groups Ⅰ, Ⅱ and Ⅲ were significantly higher than test group Ⅳ (P<0.05), and there was no significant difference among the 4 groups (P>0.05); crude protein intake, there was no significant differenc among test groups (P>0.05), and there was no significant differenc among test groups Ⅰand Ⅱ, and control group (P>0.05), but test groups Ⅲ and Ⅳ were significantly lower than control group (P<0.05). 2) Average daily milk yield, the means of the whole test period of control group, test groups Ⅰ, Ⅱ and Ⅲ were significantly higher than that of test group Ⅳ (P<0.05), and were increased by 6.17%, 8.27%, 9.06% and 9.59%, respectively, but there were no significant differences among control group, test groups Ⅰ, Ⅱ and Ⅲ (P>0.05). 3) there were no significant differences of milk composition among control group and 4 test groups (P>0.05). 4) The mean of total nitrogen excretion of the whole test period, 4 test groups reduced by 4.19%, 9.36%, 12.08% and 18.02% compared with control group, respectively, and there were significant differences among groups (P<0.05 or P<0.01). Considering milk performance and nitrogen excretion of dairy cows, proper DDGS level in concentrate of dairy cows is 25.0% under the condition in the present experiment.

Key words： distillers dried grains with solubles; milk yield; milk composition; nitrogen excretion

参考文献

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