加工用田间番茄温室气体足迹的变异性：年际和国家间评估。,Environmental Science & Technology

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加工用田间番茄温室气体足迹的变异性：年际和国家间评估。
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-12-14 , DOI: 10.1021/acs.est.7b04361
Wan Yee Lam ₁ , Rosalie van Zelm ₁ , Ana Benítez-López ₁ , Michal Kulak ₂ , Sarah Sim ₂ , J M Henry King ₂ , Mark A J Huijbregts ₁

Affiliation

我们的研究对田间种植的西红柿进行加工所产生的温室气体（GHG）足迹变异性进行了综合分析。三年（2013-2015）期间，全球14个国家/地区的890个观测值的特定于农场的全球数据集是根据联合利华可持续农业法规种植的农场获得的。它平均占全球加工番茄年产量的3％：洞察力可用于帮助为公司的采购策略和认证计划提供信息。中位数温室气体足迹范围从智利的18到印度每吨番茄61千克二氧化碳当量，低于其他研究报告的结果。我们发现，国家内部的足迹比它们之间的足迹更为一致。使用线性混合效应模型，我们量化了环境条件和农场管理因素的相对影响。关键变量是生产面积和施肥方法。随着生产面积的增加，GHG足迹减少至17.4公顷的阈值。通常，使用单一肥料施用方法的农场的温室气体排放量要大于使用多种肥料组合方法的农场。我们得出的结论是，应优先考虑农场管理因素以用于将来的数据收集，如果在计划（例如联合利华的可持续农业法规）中或计划之间需要更大的结果可比性，则需要对可接受的实践进行更严格的指导。通常，使用单一肥料施用方法的农场的温室气体排放量要大于使用多种肥料组合方法的农场。我们得出的结论是，应优先考虑农场管理因素以用于将来的数据收集，如果在计划（例如联合利华的可持续农业法规）中或计划之间需要更大的结果可比性，则需要对可接受的实践进行更严格的指导。通常，使用单一肥料施用方法的农场的温室气体排放量要大于使用多种肥料组合方法的农场。我们得出的结论是，应优先考虑农场管理因素以用于将来的数据收集，如果在计划（例如联合利华的可持续农业法规）中或计划之间需要更大的结果可比性，则需要对可接受的实践进行更严格的指导。

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Variability of Greenhouse Gas Footprints of Field Tomatoes Grown for Processing: Interyear and Intercountry Assessment.

Our study provides an integrated analysis of the variability of greenhouse gas (GHG) footprints of field-grown tomatoes for processing. The global farm-specific data set of 890 observations across 14 countries over a three-year period (2013-2015) was obtained from farms grown under Unilever's sustainable agricultural code. It represents on average 3% of the annual global production of processing tomatoes: insights can be used to help inform corporate sourcing strategies and certification schemes. The median GHG footprint ranged from 18 in Chile to 61 kg CO2-equiv per tonne of tomatoes in India, lower than results reported in other studies. We found that footprints are more consistent within countries than between them. Using linear mixed effect models, we quantified the relative influence of environmental conditions and farm management factors. Key variables were area of production and the method of fertilizer application. GHG footprints decreased with increasing area of production to a threshold of 17.4 ha. Farms using single fertilizer application methods in general had a larger GHG footprint than those using a combination of methods. We conclude that farm management factors should be prioritized for future data collection, and more stringent guidance on acceptable practices is required if greater comparability of outcomes is needed either within a scheme, such as the Unilever's sustainable agriculture code, or between schemes.

更新日期：2017-12-15

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