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首页> 外文期刊>The Kasetsart Journal >Comparative Performances of Holstein-Friesian Cows under Smallholder and Large Scale Farmers' Management in Central Rift Valley, Ethiopia
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Comparative Performances of Holstein-Friesian Cows under Smallholder and Large Scale Farmers' Management in Central Rift Valley, Ethiopia

机译：埃塞俄比亚中部裂谷小农户和大农户管理下的荷斯坦奶牛比较表现

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摘要

A study was conducted in Central Rift Valley of Ethiopia to assess comparative productive and reproductive performances of graded Holstein Friesian cows under small and large scale farmers' management. A total of 28 animals from both small (14) and large scales farms (14) in different parity classes were used for data collection for a period of 28 weeks. Significant differences were observed in daily intakes of dry matter, crude protein and P (p < 0.001) as well as metabolizable energy and Na (p < 0.01) between the two farming scales. Daily milk yield and fatcorrected (FC) milk yields were also significantly (p < 0.001) different. The differences in the composition of milk and postpartum reproductive parameters measured were not statistically significant (p > 0.05) between the farm scales. However, the longer days open (171) was observed for small scale farms than the large scale farms (148). Days from calving to the first sign of estrus (115d) and numbers of services per conception (2.1) were higher on large scale farms than on the small scale farms (96 and 1.6 respectively). Milk yield, milk composition and reproductive efficiencies did not significantly (p > 0.05) differ between parity classes. Generally, the productive and reproductive performances of graded Holstein Friesian cows in this study were under their expected genetic potential, as compared to other parts of the tropics. This might be attributed mainly to poor nutritional qualities of the available feed resources, in terms of protein, energy and mineral balance which needed further investigation.
机译：在埃塞俄比亚中部裂谷进行了一项研究，以评估在小规模和大规模农民管理下分级荷斯坦黑白花奶牛的比较生产性能和生殖性能。来自小型（14）和大型农场（14）的不同平价等级的总共28只动物用于28周的数据收集。在两种耕作规模之间，每天摄入的干物质，粗蛋白和磷（p <0.001）以及可代谢能量和钠（p <0.01）之间存在显着差异。每日牛奶产量和经过脂肪校正的（FC）牛奶产量也有显着差异（p <0.001）。在农场规模之间，牛奶成分和产后生殖参数的测量差异无统计学意义（p> 0.05）。但是，小型农场的开放日（171）比大型农场（148）长。大型农场从产犊到发情初潮的天数（115d）和每个受孕的服务次数（2.1）高于小型农场（分别为96和1.6）。在同等等级之间，产奶量，产奶成分和生殖效率没有显着差异（p> 0.05）。通常，与热带地区的其他地区相比，本研究中分级荷斯坦黑白花奶牛的生产和生殖性能处于其预期的遗传潜力之下。这可能主要归因于可用饲料资源的营养质量差，就蛋白质，能量和矿物质的平衡而言，这需要进一步研究。

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