Perennial-GHG: A new generic allometric model to estimate biomass accumulation and greenhouse gas emissions in perennial food and bioenergy crops
Perennial-GHG: A new generic allometric model to estimate biomass accumulation and greenhouse gas emissions in perennial food and bioenergy crops
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DOI：
10.1016/j.envsoft.2017.12.005
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发表时间：
2018-04
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影响因子：
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通讯作者：
A. Ledo;R. Heathcote;A. Hastings;Pete Smith;J. Hillier
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文献类型：
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作者：
A. Ledo;R. Heathcote;A. Hastings;Pete Smith;J. Hillier
农业及其对土地的影响占人类温室气体排放总量的近三分之一。同时，它是唯一一个通过提供能源原料和在生物质和土壤中的封存来抵消负排放的巨大潜力的部门。多年生作物占全球耕地面积的30%。然而，生物质储存对温室气体净排放的积极影响在很大程度上被忽视了。其原因包括多年生植物生物量计算方法的不一致。在这项研究中，我们提出了一个通用模型来计算多年生作物的碳平衡和温室气体排放，包括生物能源和粮食作物。如果有必要的经验数据存在，该模型可以对任何给定作物进行参数化。我们以四种多年生作物——苹果、咖啡、甘蔗和芒草——为例说明了生物质在总体农业温室气体排放中的重要性。
Agriculture, and its impact on land, contributes almost a third of total human emissions of greenhouse gases (GHG). At the same time, it is the only sector which has significant potential for negative emissions through offsettingviathe supply of feedstock for energy and sequestration in biomass and soils. Perennial crops represent 30% of the global cropland area. However, the positive effect of biomass storage on net GHG emissions has largely been ignored. Reasons for this include the inconsistency in methods of accounting for biomass in perennials. In this study, we present a generic model to calculate the carbon balance and GHG emissions from perennial crops, covering both bioenergy and food crops. The model can be parametrized for any given crop if the necessary empirical data exists. We illustrate the model for four perennial crops – apple, coffee, sugarcane, andMiscanthus– to demonstrate the importance of biomass in overall farm GHG emissions.