Effects of daytime or night-time grazing on animal performance, diurnal behaviour and enteric methane emissions from dairy cows at high latitudes

IF 0.8 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Acta Agriculturae Scandinavica Section A-Animal Science Pub Date : 2023-09-10 DOI:10.1080/09064702.2023.2249907

Quentin Lardy, Mohammad Ramin, Vibeke Lind, Grete Jørgensen, Mats Höglind, Emma Ternman, Mårten Hetta

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引用次数: 0

Abstract

This study compared animal performance and enteric methane (CH4) emissions from dairy cows in a part-time grazing (PTG) system in northern Sweden. Twenty-four Nordic Red dairy cows were allocated to one of two treatments: DAY (10 h daytime pasture access) or NIGHT (12 h night-time pasture access). The cows in each treatment received the same ad libitum partial mixed ration (PMR) indoors and ad libitum herbage allowance. Methane was recorded using two linked GreenFeedTM emissions monitoring (GEM) units, on pasture and indoors. Day or night grazing showed no statistical differences in estimated grass or PMR intake, milk production or daily enteric CH4 emissions. There was a rapid decrease in diurnal CH4 emissions (28%) when the cows were moved from indoors to pasture in both grazing treatments. Using two GEM units (indoor, outdoor) in combination improved the diurnal assessment of enteric CH4 emissions during PTG conditions in the mixed feeding system.

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白天和夜间放牧对高纬度地区奶牛生产性能、日间行为和肠道甲烷排放的影响

本研究比较了瑞典北部兼职放牧(PTG)系统中奶牛的动物生产性能和肠道甲烷(CH4)排放。24头北欧红奶牛被分配到日间(10 h日间放牧)和夜间(12 h夜间放牧)两种处理中的一种。各处理奶牛在室内饲喂相同的部分混合日粮(PMR)和自由支配的草料补给量。在牧场和室内使用两个相连的GreenFeedTM排放监测(GEM)装置记录甲烷。日间或夜间放牧在估计的草或PMR摄入量、产奶量或每日肠道CH4排放量方面没有统计学差异。两种放牧方式下，将奶牛从室内移至牧场，日CH4排放量均迅速减少(28%)。联合使用两个GEM单元(室内和室外)改善了混合饲养系统中PTG条件下肠道CH4排放的日评估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Agriculturae Scandinavica Section A-Animal Science 农林科学-奶制品与动物科学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： Acta Agriculturæ Scandinavica, Section A – Animal Science publishes results of original research in animal science and their applications related to the following topics: -Animal breeding and genetics -Molecular genetics -Animal physiology and reproduction -Nutrition and feeding -Animal behaviour and welfare -General animal husbandry and systems of production, including economic and technical aspects -Hygiene and quality of animal products In addition to original articles, covering basic as well as applied subjects, the journal features review articles and short communications. Acta Agriculturæ Scandinavica, Section A – Animal Science forms part of a trilogy of titles published on behalf of the Nordic Association of Agricultural Scientists (NJF). The series also includes Section B - Soil & Plant Science and the recently launched Section C - Food Economics . Acta Agriculturae Scandinavica A, B and C are available to purchase as a combined subscription. This provides access to all three journals in the series, and is available to institutional subscribers only. For full pricing information, please view the Taylor & Francis Journals Price List here. Scientists in research, teaching and extension with specialised interest in animal science and production.