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首页> 外文期刊>Regional Environmental Change >Soil organic carbon monitoring to assess agricultural climate change adaptation practices in Navarre, Spain
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Soil organic carbon monitoring to assess agricultural climate change adaptation practices in Navarre, Spain

机译：土壤有机碳监测评估西班牙纳瓦尔的农业气候变化适应实践

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摘要

Climate change adaptation strategies are needed for agriculture, one of the most vulnerable human activities. In Navarre, North of Spain, ongoing adaptive management practices were identified and promoted in the framework of a regional adaptation strategy. Most include practices aiming to increase topsoil organic carbon (SOC) in agricultural land. In this work, the effectiveness of these practices (conservation agriculture, crop rotations, additions of organic matter, irrigation, and controlled grazing management) was assessed by means of monitoring SOC in a network of 159 agricultural fields across the region. These fields were selected across bioclimatic zones, where soil vulnerabilities and land-uses were previously assessed, to represent the most widespread conditions in the region. A sampling protocol designed to compare SOC stocks in plots with equal soil conditions within each zone, and with or without adaptive practices, allowed the determination of their effect size (measured as response ratios, RR). Exogenous organic matter addition was the most effective practice for SOC storage (RR 95% confidence interval (CI) [1.25-1.37]) across the region. Controlled grazing also resulted in net SOC gains (RR CI [1.13-1.42]) in temperate and semiarid grasslands. Conservation agriculture seemed to be more effective in the driest zone (RR CI [1.30-1.53]) than in the more humid ones (RR CI [0.98-1.21]). Irrigation also displayed a net positive effect (RR CI [1.17-1.34]), modulated by irrigated crop management, whereas crop rotations had an overall negative impact vs. monoculture (RR CI [0.84-0.96]), likely by their interaction with irrigation. These results confirm the variability in SOC responses to changes in management, and SOC as an indicator for assessing regional adaptation practices, although other biophysical, agronomic, and socio-economic factors also need to be accounted for.
机译：农业需要气候变化适应策略，是最脆弱的人类活动之一。在西班牙北部的纳瓦雷，在区域适应策略的框架内确定并促进了持续的自适应管理实践。大多数包括旨在增加农业土地上的表土有机碳（SoC）的实践。在这项工作中，通过在该地区159个农业领域的网络网络中监测SOC，通过监测SOC来评估这些实践的有效性（保护农业，作物旋转，有机物，灌溉和受控放牧管理）。这些字段横跨生物融合区，先前评估了土壤脆弱性和土地用途，以代表该地区最广泛的条件。一种采样协议，旨在将SoC库存与每个区域内的土壤条件相等，有或没有自适应实践，允许确定其效果大小（测量为响应比，RR）。外源性有机物添加是整个地区的SOC储存最有效的SOC储存的做法（RR 95％置信区间（CI）[1.25-1.37]）。受控放牧也导致温带和半干旱草原上的净SoC收益（RR CI [1.13-1.42]）。保护农业似乎在最干燥的区域（RR CI [1.30-1.53​​]）比更潮湿的区域更有效（RR CI [0.98-1.21]）。灌溉还展示了净积极效果（RR CI [1.17-1.34]），由灌溉作物管理调节，而作物旋转具有整体负面影响与单一文化（RR CI [0.84-0.96]），可能是与灌溉的互动。这些结果证实了对管理层的变化以及SOC作为评估区域适应实践的指标的可变性，尽管其他生物物理学，但也需要考虑到其他生物物理学和社会经济因素。

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