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在肉牛的饮食中添加富含单宁的豆类可以减少其排泄物中的温室气体排放。

Inclusion of a tannin-rich legume in the diet of beef steers reduces greenhouse gas emissions from their excreta.

机构信息

North Florida Research and Education Center, University of Florida, Marianna, FL, 32446, USA.

Department of Animal and Dairy Science, University of Georgia, Tifton, GA, 31793, USA.

出版信息

Sci Rep. 2022 Aug 20;12(1):14220. doi: 10.1038/s41598-022-18523-y.

DOI:10.1038/s41598-022-18523-y
PMID:35987790
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9392745/
Abstract

The objectives of this study were to determine the emission of nitrous oxide (NO), methane (CH), and carbon dioxide (CO), as well as the isotopic composition of NO from excreta of beef steers fed 'AU Grazer' sericea lespedeza hay [SL; Lespedeza cuneata (Dum. Cours.) G. Don]. Fifteen Brahman × Angus crossbred steers were fed one of three experimental diets: 0, 50, or 100% inclusion of SL into 'Tifton 85' bermudagrass hay (Cynodon spp.). Gas sampling occurred on days 0, 1, 3, 5, 7, 14, 18, 25, and 32 after urine or feces application to static chambers for two experimental periods. Effect of the day after feces application (P < 0.001), while day × inclusion of SL interaction was observed in urine (P < 0.001) for all greenhouse gases (GHG) analyzed. Peaks of emission of all GHG in urine and feces occurred in the first days (P < 0.001), with days 3 and 5 being most depleted in N-NO in feces, and days 3, 5, and 7, in urine (P < 0.001). Feeding SL to beef steers was effective in mitigating the emission of GHG from the excreta, but further research is necessary to investigate the mechanisms behind the reductions.

摘要

本研究旨在确定饲喂 AU 牧豆草（Lespedeza cuneata）干草的肉牛排泄物中一氧化二氮（NO）、甲烷（CH）和二氧化碳（CO）的排放情况，以及 NO 的同位素组成。15 头婆罗门牛×安格斯杂交牛被饲喂三种实验日粮之一：0%、50%或 100% SL 饲粮添加到 Tifton 85 百慕大草干草（Cynodon spp.）中。在尿液或粪便应用于静态室后的第 0、1、3、5、7、14、18、25 和 32 天进行气体采样，进行了两个实验期。粪便应用后第 1 天（P<0.001）和第 7 天（P<0.001）的影响，尿液中所有温室气体（GHG）的日×SL 互作（P<0.001）。所有 GHG 的排放峰值均出现在粪便和尿液的前几天（P<0.001），粪便中 N-NO 在第 3 和第 5 天最为耗尽，尿液中在第 3、5 和 7 天最为耗尽（P<0.001）。饲喂 SL 可有效减少肉牛排泄物中 GHG 的排放，但需要进一步研究以探讨减排的机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/3e9c8154162e/41598_2022_18523_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/5be1d4c92ac2/41598_2022_18523_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/ea2846d527f3/41598_2022_18523_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/1516bfba1830/41598_2022_18523_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/ecc10ae68501/41598_2022_18523_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/3e9c8154162e/41598_2022_18523_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/5be1d4c92ac2/41598_2022_18523_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/ea2846d527f3/41598_2022_18523_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/1516bfba1830/41598_2022_18523_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/ecc10ae68501/41598_2022_18523_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac4d/9392745/3e9c8154162e/41598_2022_18523_Fig5_HTML.jpg

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