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Effect of Stabilized Fish Oil Source on Sperm Quality and Production of Boars

Open Journal of Animal Sciences 2021年第2期11卷 197-207页

作者： Michael Andrew Parsley mark elder wilson Thomas John Gall mark Richard Malcolm Ballard Feedworks USA Ltd. Cincinnati USA wilson Consulting Service McFarland USA Gall Consulting Service Burlington USA The Ballard Group Inc. Cincinnati USA

Research findings for supplementing boar stud diets with fish oils are inconsistent. This study was designed to address three possible causes of performance variation of boars to fish oil supplementation: stability of the fatty acid source, level of inclusion and breed of boars tested. Three groups of 87 boars each, from two genetic lines (PIC 337 and PIC 800), were assigned to treatment based on age, mean sperm production (previous 12 weeks), and body condition score. All boars received a corn-soybean meal diet with a commercial fish oil supplement providing 1.83 g/boar/day of docosahexaenoic acid (DHA) as a preconditioning diet. On 10-Aug., 2020, the DHA source was changed to a stabilized starch imbedded source of refined fish oil (Salmate®), providing 1.83 g/b/d for the test diet. Two additional levels providing 2.38 and 2.94 g/b/d of DHA were fed for a 9 week pretreatment period and during the test period. Salmate® fed at 2.38 g/b/d of DHA resulted in a reduction in the number of rejected ejaculates (P 0.045) by 7.5% and 6.4% compared to the lowest and highest inclusion rates, respectively. There were no treatments by genetic line interactions. A retrospective study of semen production and quality of 77 boars on the Salmate® diet containing 1.83

关键词： Boars Docosahexaenoic Acid (DHA) Salmate® Total Sperm Semen Doses

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Economic Viability Analysis of Investment Alternatives for the Use of Biogas in a Pig Farming in the Middle East Area of Brazil

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Journal of Energy and Power Engineering 2013年第8期7卷 1433-1439页

作者： elder Geraldo Domingues1 Tauler Teixeira Borges wilson Bueno Garces Junio~ Aylton Jose Alves Wesley Pacheco Calixto Jose Luis Domingos Nucleus of Research and Extension in Sustainable Process Technology Federal Institute of Goias Goiania 74(~00 Brazil Agro-industrial Chemical Technology Federal Institute of Goias Goiania 74900 Brazil

This paper presents an economic viability analysis of two investment alternatives for a pig farming located in the city of Jatai, Goias State, Brazil. The first investment alternative consists of the implementation of a biodigester, being the biogas burned in a flare. The second alternative also consists of a biodigester, nevertheless the produced biogas is used to generate electricity. The methodologies to estimate the methane production in anaerobic reactors are presented, as well as those for the quantification of the baseline and project emissions and of the electricity that can be generated. The results showed that the use of biogas for the electricity generation is the alternative more economically viable.

关键词： Renewable energy biogas pig farming carbon credits economic viability.

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