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Agroforestry systems impact soil macroaggregation and enhance carbon storage in Colombian deforested Amazonia
Geoderma ( IF 6.1 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.geoderma.2020.114810
Leonardo Rodríguez , Juan Carlos Suárez , Wilson Rodriguez , Kelly Johana Artunduaga , Patrick Lavelle

Abstract We investigated the capacity of different types of agroforestry systems to promote the formation of soil macroaggregates through biological or physical processes. Soil macroaggregates were visually separated according to morphological patterns into invertebrate biogenic (small and large faunal aggregates), root biogenic and physicogenic. We evaluated organic carbon in the different types of aggregates: small and large faunal, root biogenic and physicogenic. In agroforestry systems associating shade trees and crops and sylvopastoral systems, small and large faunal aggregates comprised 58.8 and 42.1% respectively of the soil mass. In general, the highest OC contents were found in root macroaggregates (14.1 g C kg−1, followed by small faunal aggregated (13.7 g C kg−1), large faunal aggregated (13.3 g C kg−1) and physicogenic macroaggregates (10.9 g C kg−1). Overall, the average carbon storage in the different land uses was 91.3 ± 4.1. Highest overall C contents were observed in sylvopastoral systems (131 Mg ha−1), pasture (112.2 Mg ha−1), home gardens (105.8 Mg ha−1), nature regeneration (100.6 Mg ha−1) and secondary forest (100.1 Mg ha−1) these being the most efficient options for storing carbon. We conclude that a sound option to increase soil C storage in aggregated structures of deforested Amazonia soils might be planting trees in pastures transformed into sylvopastoral systems.

中文翻译:

农林业系统影响土壤宏观聚集并增强哥伦比亚森林砍伐的亚马逊地区的碳储存

摘要 我们研究了不同类型的农林复合系统通过生物或物理过程促进土壤大团聚体形成的能力。土壤大团聚体根据形态模式在视觉上分为无脊椎动物生物(小型和大型动物群)、根生物和物理。我们评估了不同类型聚集体中的有机碳:小型和大型动物群、根生物和物理。在将遮荫树和作物以及林牧系统联系起来的农林业系统中,小型和大型动物群落分别占土壤质量的 58.8% 和 42.1%。一般来说,在根大团聚体中发现了最高的 OC 含量(14.1 g C kg-1,其次是小型动物群聚体(13.7 g C kg-1),大型动物群聚体(13. 3 g C kg-1) 和生理大聚集体 (10.9 g C kg-1)。总体而言,不同土地利用的平均碳储量为 91.3±4.1。在林牧系统(131 Mg ha-1)、牧场(112.2 Mg ha-1)、家庭花园(105.8 Mg ha-1)、自然再生(100.6 Mg ha-1)和次生林(100.1 Mg ha-1) 这些是储存碳的最有效选择。我们得出的结论是,在被砍伐的亚马逊土壤的聚合结构中增加土壤碳储存的一个合理选择可能是在转变为林牧系统的牧场上种植树木。6 Mg ha-1) 和次生林 (100.1 Mg ha-1) 这些是储存碳的最有效选择。我们得出的结论是,在被砍伐的亚马逊土壤的聚合结构中增加土壤碳储存的一个合理选择可能是在转变为林牧系统的牧场上种植树木。6 Mg ha-1) 和次生林 (100.1 Mg ha-1) 这些是储存碳的最有效选择。我们得出的结论是,在被砍伐的亚马逊土壤的聚合结构中增加土壤碳储存的一个合理选择可能是在转变为林牧系统的牧场上种植树木。
更新日期:2021-02-01
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