4.7 Article

Free-range acorn feeding results in negative carbon footprint of Iberian pig production in the dehesa agro-forestry system

期刊

JOURNAL OF CLEANER PRODUCTION
卷 418, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2023.138170

关键词

Life cycle assessment; Agroforestry; Dehesa; Carbon sequestration; Grazing

向作者/读者索取更多资源

Iberian pig production has different handling and feeding systems, which affect production costs, market price, and environmental impact. This study aims to assess the Carbon Footprint (CF) of different Iberian pig production systems using the Life Cycle Assessment (LCA) methodology.
Iberian pig production has its own quality regulation, which defines different handling and feeding systems for this breed. These differences influence production costs, market price and environmental impact. The most extensive system of fattening Iberian pigs is based on foraging acorns in a silvopastoral system named dehesa, and consumers usually associate the Iberian pork with this system, although nowadays more intensive systems are dominant due to their productivity and management simplicity. The aim of this study is to assess the Carbon Footprint (CF) of the different Iberian pig production systems using the Life Cycle Assessment (LCA) methodology.This study is based on data collected from 19 Iberian pig farms producing nursery growers (& LE;25 kg, 2 farms), pre-finished pigs (100-110 kg, 3 farms) and 3 types of finished pigs (150-175 kg), including free-range fattened pigs (17 farms), outdoor intensively fattened pigs (2 farms) and indoor intensively fattened pigs (2 farms). The CF was calculated with a cradle to farm gate approach using the kg of live weight (kgLW) as functional unit, and including C sequestration in soils and biomass, which was calculated by field monitoring in a selection of measuring points. The average CFs of the final products were 9.2 & PLUSMN; 2.5 kg CO2eq kgLW- 1 for nursery growers, 5.6 & PLUSMN; 2.42 kg CO2eq kgLW- 1 for pre-finished pigs,-5.6 & PLUSMN; 6.5 kg CO2eq kgLW- 1 for free-range fattened pigs, 3.1 & PLUSMN; 1.5 kg CO2eq kgLW-1 for outdoor intensively fattened pigs and 7.7 & PLUSMN; 0.3 kg CO2eq kgLW- 1 for intensively fattened pigs. The main C sinks of the dehesa system (trees and soil) sequestered an average of 3.18 t CO2eq ha-1 year- 1. This C sequestration, averaging-10.2 & PLUSMN; 6.7 kg CO2eq kgLW-1 in free-range pig production, offsets 223% of the GHG emissions in those systems, which resulted in a negative CF (net CO2 sequestration). There was a direct rela-tionship between CF and pig stocking rate, leading to strongly negative CF values on those farms with the lowest pig stocking rates.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据