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| Flores, Edgar Dulay; Dela Cruz, Renita S. M.; Antolin, Ma Cecilia R.. |
| Four corn production systems at farmer-level of operation were evaluated. Environmental performance such as energy use, energy efficiency, greenhouse gas emission (GHG) and carbon efficiency were determined. Data were collected from 60 corn producing farmers using survey questionnaires and face to face interview. The input energy to produce an output energy of 69,714.06 and 73,029.60 MJ/ha for sun drying and mechanical drying, respectively, were 22,346.27, 31, 469.75, 22, 399.05 and 31,522.53 MJ/ha for systems 1 (manual harvesting and sun drying), 2 (manual harvesting and mechanical drying), 3 (mechanical harvesting and sun drying) and 4 (mechanical harvesting and mechanical drying), respectively. The highest energy input was observed for system 4... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural and Bioprocess Engineering; Energy and Environmental Engineering corn; Carbon; Energy; Global warming potential; Greenhouse gases. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3568 |
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| Monteiro,Alessandra Nardina Trícia Rigo; Dourmad,Jean-Yves; Pozza,Paulo Cesar. |
| ABSTRACT: Environmental impacts of livestock systems, especially pig production, have come under increasing debate in recent years. The challenge is in meeting the growing demand for food at an affordable cost, without compromising environmental integrity. Previous studies have shown that feed production is responsible for the majority of CO2-eq. emission resulting from pig farming systems. This seems to indicate that feed strategies could be an effective tool to achieve the sustainability of the pork chain. Therefore, dietary crude protein reduction, through the addition of industrial amino acids, lessens the nitrogen excretion by pigs and, consequently, could mitigate the effects on the environment of pig production. In this sense, to effectively... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Environmental impact; Global warming potential; Greenhouse gases; Nutrient. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600653 |
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