Comparison of rumen contents' characteristics in Nguni and Bonsmara cows raised under two different grazing systems.

IF 1.5 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Journal of Advanced Veterinary and Animal Research Pub Date : 2024-06-08 eCollection Date: 2024-06-01 DOI:10.5455/javar.2024.k783
Denis Kayima, Mhlangabezi Slayi, Ishmael Festus Jaja, Cletos Mapiye, Kennedy Dzama
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引用次数: 0

Abstract

Objective: This study aimed to evaluate rumen fermentation parameters influenced by both grazing system and breed.

Materials and methods: A 2 × 2 factorial design was employed, involving 40 cows with matched age, parity, and physiological status. The cows were evenly divided between Bonsmara and Nguni breeds, as well as communal and commercial grazing systems. Rumen fluid samples were collected and analyzed for parameters including ammonia-nitrogen (NH3-N), pH, temperature, and volatile fatty acids (VFAs).

Results: Nguni cows exhibited significantly higher ruminal NH3-N levels (p < 0.05) compared to Bonsmara, ranging from 69.05 to 96.78 mg/l. Commercial grazing demonstrated significantly higher NH3-N concentrations (p < 0.05) than communal grazing. Ruminal pH, temperature, total VFAs, and specific VFAs (Iso-butyrate, valeric, and iso-valeric) did not show significant differences (p > 0.05). However, total VFAs were slightly lower in communal grazing (78.87 mmol/l) than in commercial grazing (89.80 mmol/l). Acetate, propionate, butyrate, and the acetate to propionate ratio did not display significant differences (p > 0.05) between breeds but varied between grazing systems. Communal systems had higher acetate and acetate to propionate ratio (p < 0.05), while commercial systems showed higher propionate and butyrate levels (p < 0.05).

Conclusion: Grazing conditions significantly influenced rumen fermentation parameters, irrespective of breed. Further research is necessary to explore the relationship between forage conditions, diversity, and rumen fermentation within different grazing systems.

在两种不同放牧系统下饲养的 Nguni 和 Bonsmara 奶牛瘤胃内容物特征的比较。
研究目的本研究旨在评估瘤胃发酵参数受放牧系统和品种的影响:采用 2 × 2 因式设计,40 头奶牛的年龄、产仔数和生理状况相匹配。这些奶牛被平均分为 Bonsmara 和 Nguni 两个品种,以及公共放牧系统和商业放牧系统。采集的瘤胃液样本分析了氨氮(NH3-N)、pH值、温度和挥发性脂肪酸(VFAs)等参数:与 Bonsmara 相比,Nguni 奶牛的瘤胃 NH3-N 水平明显更高(p 0.05),从 69.05 毫克/升到 96.78 毫克/升不等。商业放牧的 NH3-N 浓度明显高于集体放牧(P 0.05)。反刍动物的 pH 值、温度、总挥发性脂肪酸和特定挥发性脂肪酸(异丁酸酯、戊酸酯和异戊酸酯)未显示出显著差异(p > 0.05)。不过,集体放牧的总挥发性脂肪酸(78.87 毫摩尔/升)略低于商业放牧(89.80 毫摩尔/升)。乙酸盐、丙酸盐、丁酸盐以及乙酸盐与丙酸盐的比率在不同品种之间没有显著差异(p > 0.05),但在不同放牧系统之间存在差异。公共放牧系统的醋酸盐和醋酸盐与丙酸盐的比率较高(p 0.05),而商业放牧系统的丙酸盐和丁酸盐水平较高(p 0.05):结论:放牧条件对瘤胃发酵参数有很大影响,与品种无关。有必要进一步研究不同放牧系统中饲草条件、多样性和瘤胃发酵之间的关系。
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来源期刊
CiteScore
2.70
自引率
7.10%
发文量
41
审稿时长
6 weeks
期刊介绍: Journal of Advanced Veterinary and Animal Research (JAVAR) - is an open access, international, peer-reviewed, quarterly, highly-indexed scientific journal publishing original research findings and reviews on all aspects of veterinary and animal sciences. Basic and applied researches on- - Anatomy & histology - Animal health economics - Animal nutrition - Animal reproduction - Animal science - Antimicrobial resistance (AMR) - Biochemistry - Biotechnology - Dairy science - Epidemiology - Food hygiene and technology - Genetics and breeding - Immunology - Microbiology - Parasitology - Pathology - Pharmacology & toxicology - Physiology - Poultry science - Preventive veterinary medicine - Public health - Surgery & obstetrics - Veterinary extension studies - Wildlife & aquatic medicine - Zoo animal medicine.
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