Managing soil carbon for climate change mitigation and adaptation in Mediterranean cropping systems: A meta-analysis
Managing soil carbon for climate change mitigation and adaptation in Mediterranean cropping systems: A meta-analysis
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DOI：
10.1016/j.agee.2013.02.003
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发表时间：
2013-03-15
影响因子：
6.6
通讯作者：
Gimeno, Benjamin S.
中科院分区：
文献类型：
--
作者：
Aguilera, Eduardo;Lassaletta, Luis;Gimeno, Benjamin S.
地中海农田是季节性干旱的农业生态系统，土壤有机碳含量低，土地退化和荒漠化风险高。SOC的增加在这些系统中特别重要，因为它可以帮助建立适应气候变化的恢复力，同时通过封存大气碳（C）有助于缓解全球变暖。我们比较了SOC的变化和碳封存下的一些推荐的管理措施（RMP）与邻近的传统地块在地中海气候（174数据集从79参考）。碳固存的最高响应是通过应用最大量的碳投入（土地处理和有机添加物）的实践实现的。保护性耕作的做法（免耕和减少耕作）诱导较低的影响大小，但显着促进固碳，而没有效果和负净固碳率观察泥浆应用和不施肥的治疗，分别。将外部有机添加物与覆盖作物或保护性耕作（结合管理措施和有机管理）相结合的做法在固碳方面表现出非常好的性能。利用30篇文献中的80个数据集，分别研究了有机经营下土壤有机碳的变化。结果还表明，在有机处理中，碳输入率的强化程度是相对碳积累背后的主要驱动力。因此，最高的净固碳率在大多数生态密集型组，如“灌溉”，“园艺”和控制实验（“地块规模”）。(C)2013爱思唯尔有限公司版权所有。
Mediterranean croplands are seasonally dry agroecosystems with low soil organic carbon (SOC) content and high risk of land degradation and desertification. The increase in SOC is of special interest in these systems, as it can help to build resilience for climate change adaptation while contributing to mitigate global warming through the sequestration of atmospheric carbon (C). We compared SOC change and C sequestration under a number of recommended management practices (RMPs) with neighboring conventional plots under Mediterranean climate (174 data sets from 79 references). The highest response in C sequestration was achieved by those practices applying largest amounts of C inputs (land treatment and organic amendments). Conservation tillage practices (no-tillage and reduced tillage) induced lower effect sizes but significantly promoted C sequestration, whereas no effect and negative net sequestration rates were observed for slurry applications and unfertilized treatments, respectively. Practices combining external organic amendments with cover crops or conservation tillage (combined management practices and organic management) showed very good performance in C sequestration. We studied separately the changes in SOC under organic management, with 80 data sets from 30 references. The results also suggest that the degree of intensification in C input rate is the main driver behind the relative C accumulation in organic treatments. Thus, highest net C sequestration rates were observed in most eco-intensive groups, such as "irrigated", "horticulture" and controlled experiments ("plot scale"). (C) 2013 Elsevier B.V. All rights reserved.