Probing the basis of soil resilience
Probing the basis of soil resilience
复制标题
DOI：
10.1111/sum.12107
复制
发表时间：
2015-10-01
影响因子：
3.8
通讯作者：
Ritz, K.
中科院分区：
文献类型：
--
作者：
Corstanje, R.;Deeks, L. R.;Ritz, K.
土壤需要具有弹性，以便在受到短期和长期环境变化的扰动时发挥其所需的功能。更好地了解恢复力的基础可能有助于改善对较差土壤的管理，以增强其恢复力，并允许对所有土壤进行长期有效管理。在本研究中，弹性被定义为从干扰中抵抗（变化程度）加上恢复（随后恢复的速度和程度）。对驱动规定的物理（空隙比）和生物（呼吸）土壤功能弹性的因素进行建模，并对38个英格兰和苏格兰土壤的已发表数据进行了分析。这表明，土壤分类类别、母质和土壤质地在土壤恢复力的决定中占主导地位，土壤微生物群落的各个方面也具有相关性。值得注意的是，通常被认为对这方面有影响的土地利用和有机质含量在重要因素中排名最低。然而，这些结论是基于目前可获得的非常有限的连贯数据集。阻力和弹性现象明显的环境依赖性的关键含义是，对它们的管理可能是可能的，但不是通过单一或直接的方法。这可能需要在特定情况下采取具体的方法，土壤的系统级配置可能比个别因素更重要。因此，系统一级的土壤管理办法可能是最有效的战略，在制定与土壤管理有关的政策方案时应考虑到这一点。
Soils need to be resilient to deliver the functions required of them when subjected to perturbations within the context of short- and long-term environmental change. A better understanding of the basis of resilience will likely underpin improved management of poorer soils to enhance their resilience, as well as allowing effective management of all soils in the longer term. In this study, resilience was defined as resistance (degree of change) coupled with recovery (rate and extent of subsequent recovery) from a disturbance. Modelling of factors that drive resilience of a prescribed physical (void ratio) and biological (respiration) soil function was carried out on published data pertaining to 38 English and Scottish soils. This revealed that soil taxonomic class, parent material and soil texture appeared dominant in determining soil resilience in general, and aspects of the soil microbial community were also pertinent. It is notable that land use and organic matter content, which are commonly hypothesized to be influential in this regard, ranked amongst the lowest significant factors. However, these conclusions are based upon the very limited coherent data sets currently available. The key implication of an apparent context dependency of the resistance and resilience phenomena is that management of them is likely to be possible, but not via a single or direct approach. It may require specific approaches in particular circumstances, and it is possible that the system-level configuration of the soil is of greater consequence than individual factors. Hence, a system-level approach to management of soils is likely to be the most effective strategy, and this should be considered in developing policy scenarios in relation to soil management.