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Evaluation of greenhouse gas emissio...

Herringshaw, Andrew Lee.

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Evaluation of greenhouse gas emissions from three dairy production systems in Iowa---Conventional, grazing, and combination conventional/grazing.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Evaluation of greenhouse gas emissions from three dairy production systems in Iowa---Conventional, grazing, and combination conventional/grazing./
作者:	Herringshaw, Andrew Lee.
面頁冊數:	96 p.
附註:	Source: Masters Abstracts International, Volume: 48-05, page: 2797.
Contained By:	Masters Abstracts International48-05.
標題:	Agriculture, General. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1475927
ISBN:	9781109762303

Evaluation of greenhouse gas emissions from three dairy production systems in Iowa---Conventional, grazing, and combination conventional/grazing.
Herringshaw, Andrew Lee.

Evaluation of greenhouse gas emissions from three dairy production systems in Iowa---Conventional, grazing, and combination conventional/grazing. - 96 p.

Source: Masters Abstracts International, Volume: 48-05, page: 2797.

Thesis (M.S.)--Iowa State University, 2010.

International debate continues about the potential effects of global warming and agriculture's role in creating and mitigating it. Needed in this discussion are detailed analyses of production systems and the factors within systems that may reduce emissions with global warming potential. I created a life cycle assessment computer model to quantify emissions from three dairy systems in Iowa---grazing, conventional, and conventional/grazing. These were modeled using system expansion methodology and SimaPro 7.1 software. Results suggest that there is a difference in emissions between system types, but more potential for reduction exists within each system than the difference between the systems.

ISBN: 9781109762303Subjects--Topical Terms:

1017510
Agriculture, General.

Evaluation of greenhouse gas emissions from three dairy production systems in Iowa---Conventional, grazing, and combination conventional/grazing.
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245 1 0 $a Evaluation of greenhouse gas emissions from three dairy production systems in Iowa---Conventional, grazing, and combination conventional/grazing.
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520 $a International debate continues about the potential effects of global warming and agriculture's role in creating and mitigating it. Needed in this discussion are detailed analyses of production systems and the factors within systems that may reduce emissions with global warming potential. I created a life cycle assessment computer model to quantify emissions from three dairy systems in Iowa---grazing, conventional, and conventional/grazing. These were modeled using system expansion methodology and SimaPro 7.1 software. Results suggest that there is a difference in emissions between system types, but more potential for reduction exists within each system than the difference between the systems.
520 $a Previously unanalyzed characteristics of dairy systems, such as interval between calving and culling rate differ between systems and have considerable effects on the net emissions. Using the COWPOLL mechanistic enteric fermentation estimation method was key in accurately differentiating emissions from grass-fed and concentrate-fed animals. Sensitivity analysis on each individual characteristic of the dairy systems leads us to conclusions of how emissions may be reduced, which differs between the dairy systems. Life cycle assessments such as this one may help lower emissions from dairy systems by targeting individual characteristics within dairy systems that can effectively reduce greenhouse gas emissions.
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