| assessment of environment impacts of egg production chain using life cycle assessment. | in this study we have to deal with the assessment of environment impacts of laying hen in the alborz province, iran. this assessment was carried out for one kg of egg during a period of 420 days for 1000 chickens. then due to significant consumption of diet during period of question, three main products including corn, soybean and wheat which are consist of 80 percent of the combination of laying chicken diet, also collected the information about their production and it has been evaluated the in ... | 2016 | 27692537 |
| life cycle energy use, costs, and greenhouse gas emission of broiler farms in different production systems in iran-a case study of alborz province. | in order to achieve sustainable development in agriculture, it is necessary to quantify and compare the energy, economic, and environmental aspects of products. this paper studied the energy, economic, and greenhouse gas (ghg) emission patterns in broiler chicken farms in the alborz province of iran. we studied the effect of the broiler farm size as different production systems on the energy, economic, and environmental indices. energy use efficiency (eue) and benefit-cost ratio (bcr) were 0.16 ... | 2017 | 28537021 |