The carbon footprints of food crop production
The carbon footprints of food crop production
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DOI：
10.3763/ijas.2009.0419
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发表时间：
2009-05-01
影响因子：
3.4
通讯作者：
Smith, Pete
中科院分区：
文献类型：
--
作者：
Hillier, Jonathan;Hawes, Cathy;Smith, Pete
农业部门对产品和机械制造、材料运输以及直接和间接土壤温室气体排放等不同来源的全球碳排放有很大贡献。在本文中，我们使用苏格兰东部的农场调查数据，结合已公布的单个农场运营的排放量估计，量化一系列农业运营的相对贡献，并确定不同作物(例如豆类、冬春谷物、油菜、土豆)和耕作实践(常规、综合和有机)的碳足迹。在所有作物和农场类型中，总排放量的75%来自氮肥的使用(有机和无机肥)--来自生产、应用和土壤的直接一氧化二氮排放。一旦氮被计算在内，有机耕作、综合耕作或常规耕作之间就没有重大区别。这些数据突出了机会或碳缓解，对于纳入对耕地生产系统的全生命周期分析和计算与土地利用变化有关的温室气体平衡将是有价值的。
The agriculture sector contributes significantly to global carbon emissions from diverse sources such as product and machinery manufacture, transport of materials and direct and indirect soil greenhouse gas emissions. In this article, we use farm survey data from the east of Scotland combined with published estimates of emissions for individual farm operations to quantify the relative contribution of a range of farming operations and determine the carbon footprint of different crops (e.g. legumes, winter and spring cereals, oilseed rape, potato) and farming practices (conventional, integrated and organic). Over all crops and farm types, 75% of the total emissions result from nitrogen fertilizer use (both organic and inorganic) - from production, application, and direct nitrous oxide emissions from the soil resulting from application. Once nitrogen is accounted for, there are no major differences-between organic, integrated or conventional farming practices. These data highlight opportunities or carbon mitigation and will be of value for inclusion in full life cycle analyses of arable production systems and in calculations of greenhouse gas balance associated with land-use change.