Research note: Effect of duration of the collection period on the estimated digestibility in dairy cows

P. Lebzien, Kerstin Loose, G. Flachowsky
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引用次数: 1

Abstract

A digestion trial was performed with 14 lactating Friesian dairy cows to compare the estimated digestibility of crude nutrients after collecting the faeces for 5, 7 and 9 d. The experimental ration consisted of grass silage (7.3 kg DM) and concentrate (10.9 kg DM). Animals were adapted to the ration for 14 d. There was no effect of the duration of the collection period on the estimated mean digestibility of crude nutrients and on the respective standard deviation. In consequence, in digestibility trials with cows the collection period must not exceed 5 d.
研究说明:收集期长短对奶牛消化率的影响
采用14头泌乳弗里西亚奶牛进行消化试验,比较收集粪便5、7和9 d后估算的粗营养物质消化率。试验日粮为草青贮(7.3 kg DM)和精料(10.9 kg DM)。动物对日粮的适应期为14 d。收集期的持续时间对粗营养物质的平均消化率估算值及其标准差没有影响。因此,在奶牛消化率试验中,收集期不应超过5 d。
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