書誌事項
- タイトル別名
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- Affection of Livestock Farming to Global Environmental Burdens and Greenhouse Effect. In the Case of Cattle.
- -in the Case of Cattle-
- ―家畜牛を例として―
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説明
The number of cattle has increased rapidly according to the increase of the population and the meat's demand. From old time, cattle have eaten grass and crop wastes, offered beef, milk, hides, manure and fuel energy, and worked as beasts of burden. In modern days, overgrazing of cattle has caused range degradation and ranchers have converted much tropical forest to cattle pasture. Especially in the developed countries, livestock producers have adopted feed grain faming in feedlots. Much animal waste from large livestock facilities has polluted rivers and groundwater.We research into global environmental burdens on livestock farming. Moreover we study the extent of cattle's contribution to global emissions of greenhouse gases(GHG). For example there are emissions of methane from rumina and CO2 from breath. Decrease of CO2 absorption comes from rangeland degradation and deforestation. N2O is discharged from fertilizer use on cropland for feed. In the total we estimate 25% in CO2, 19% in methane and 18%(with uncertainty) in N2O as contribution of anthropogenic GHG emissions, taking the above vegetative degradation into account. The required menthane's reduction rate to stabilize concentration is 10% to all anthropogenic emission because of short life in troposphere. Therefore we can conclude catte's contribution to methane emission is great. On the other hand, reduction rates of CO2 and N2O are required to be more than 60% and 7080% respectively. So we can not solve the problem of the global warming even if cattle farming is stopped in the world.
収録刊行物
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- 環境科学会誌
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環境科学会誌 8 (2), 129-138, 1995
社団法人 環境科学会
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詳細情報 詳細情報について
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- CRID
- 1390282679397572608
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- NII論文ID
- 130004104467
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- ISSN
- 18845029
- 09150048
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
- Crossref
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- 抄録ライセンスフラグ
- 使用不可