دورية أكاديمية
أعرض في EDS

Dietary concentrate supplementation increases milk production and reduces predicted greenhouse gas emission intensity in pasture-based commercial dairy farms.

التفاصيل البيبلوغرافية
العنوان: Dietary concentrate supplementation increases milk production and reduces predicted greenhouse gas emission intensity in pasture-based commercial dairy farms.
المؤلفون: Dida MF; School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 2006 Camden, NSW, Australia. Electronic address: mulisa.dida@sydney.edu.au., Garcia SC; School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 2006 Camden, NSW, Australia., Gonzalez LA; School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 2006 Camden, NSW, Australia.
المصدر: Journal of dairy science [J Dairy Sci] 2024 Aug; Vol. 107 (8), pp. 5639-5652. Date of Electronic Publication: 2024 Mar 22.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: American Dairy Science Association Country of Publication: United States NLM ID: 2985126R Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1525-3198 (Electronic) Linking ISSN: 00220302 NLM ISO Abbreviation: J Dairy Sci Subsets: MEDLINE
أسماء مطبوعة: Publication: Champaign, IL : American Dairy Science Association
Original Publication: Lancaster, Pa. [etc.]
مواضيع طبية MeSH: Milk*/chemistry , Dietary Supplements* , Greenhouse Gases*/analysis , Lactation* , Diet*/veterinary, Animals ; Cattle ; Female ; Dairying ; Methane/biosynthesis ; Methane/analysis ; Australia ; Animal Feed/analysis ; Farms ; Manure/analysis ; Greenhouse Effect
مستخلص: Controlled studies have extensively documented that concentrate supplements typically increase enteric CH 4 emissions and milk yield and reduce emissions per unit of milk produced and dry matter intake. However, no studies have been conducted to determine the effect of concentrate on predicted greenhouse gas emissions from dairy farms representing the Australian pasture-based farming system. Thus, this study sought to determine how dietary concentrate supplementation affects enteric and manure CH 4 , and N 2 O of Australian pasture-based dairy farms. The Australian Dairy Carbon Calculator was used, which incorporates emission factors and methodologies used in the National Greenhouse Gas Inventory as reported to the Intergovernmental Panel on Climate Change. Primary data were collected and analyzed from 120 commercial farms in Australia's major dairy regions. Then the farms were divided into 4 groups based on their dietary concentrate supplementation: ≤1 (low; 15 farms), 1 to 2 (moderate; 35 farms), 2 to 3 (high; 35 farms), and ≥3 (very high; 35 farms) t of concentrate dry matter (tDM) per cow per year. Sources of greenhouse gas emissions were CO 2 from concentrate production, enteric CH 4 , and manure CH 4 and N 2 O. Total dry matter intake, milk yield, and daily enteric CH 4 production (g/d) quadratically increased with concentrate level, whereas greenhouse gas emission intensity of milk production (kg of CO 2 equivalent per kg of fat- and protein-corrected milk) decreased by 14% for farms supplementing with ≥3 tDM/cow per year compared with those supplementing with ≤1 tDM/cow per year of dietary concentrate. The N 2 O and CH 4 emissions from manure increased quadratically and linearly, respectively, with the increasing supplementation of concentrate. Farms supplementing 2 to 3 tDM/cow per year showed substantial increases in gross income, gross margin, earnings before interest and tax, and net income ($/cow per year) compared with those supplementing of ≤1, 1 to 2, and ≥3 tDM/cow per year. Overall, increasing dietary concentrate supplementation for dairy cows resulted in increased milk production per cow, reduced greenhouse gas emissions per unit of milk produced, and increased income and profit. However, a comprehensive life cycle assessment study is needed to account for carbon sequestration by other farm components, such as pastures and trees, which were not considered in the present study. In addition, the present study was based on modeling and did not gather ground truth information for DMI, digestibility, crude protein, and urinary and fecal N excretion. Therefore, data should be interpreted with caution, and studies gathering such information are encouraged.
(© 2024, The Authors. Published by Elsevier Inc. on behalf of the American Dairy Science Association®. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).)
فهرسة مساهمة: Keywords: methane; milk yield; nitrous oxide
المشرفين على المادة: 0 (Greenhouse Gases)
OP0UW79H66 (Methane)
0 (Manure)
تواريخ الأحداث: Date Created: 20240324 Date Completed: 20240727 Latest Revision: 20240727
رمز التحديث: 20240728
DOI: 10.3168/jds.2023-24303
PMID: 38522827
قاعدة البيانات: MEDLINE
الوصف
تدمد:1525-3198
DOI:10.3168/jds.2023-24303