Soil organic carbon stock and litter mass in silvopastoral systems with Eucalyptus

IF 2 3区农林科学 Q2 AGRONOMY Agroforestry Systems Pub Date : 2024-02-27 DOI:10.1007/s10457-024-00960-5

Alan Figueiredo de Oliveira, Claudinei Alves dos Santos, Lúcio Carlos Gonçalves, Maria Celuta Machado Viana, Miguel Marques Gontijo Neto, Edilane Aparecida da Silva, Ângela Maria Quintão Lana

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Abstract

The objective of this study was to evaluate the soil organic carbon stock and litter mass in silvopastoral systems (SSP) implemented with Urochloa decumbens and different Eucalyptus spatial arrangements. The SSP was implemented in 2008 with the spatial arrangements of (3 × 2) + 20 m (434 trees ha⁻¹), (2 × 2) + 9 m (909 trees ha⁻¹) and 9 × 2 m (556 trees ha⁻¹) formed by the Eucalyptus cultivars GG100, I144 and VM 58. Soil samples at 0 to 20 and 0 to 40 cm depths were collected in SSP in 2011 and 2015 to determine soil organic carbon stock. The soil organic carbon stock was 38.5% higher in 2015 compared to 2011 (111 vs. 80.7 Mg ha⁻¹), which represented an annual sink of 6.22 Mg ha⁻¹ and indicates an increase in carbon stock over years. Litter mass was greater under the canopy than between trees, probably due to the greater drop in biomass in this location. The silvopastoral systems showed similar volumes of litter and soil organic carbon, which indicates that the evaluated arrangements have similar capacities to store carbon.

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种植桉树的林牧系统中的土壤有机碳储量和枯落物质量

本研究的目的是评估采用十日生桉树和不同桉树空间布局的林牧系统（SSP）中的土壤有机碳储量和枯落物质量。该系统于 2008 年实施，桉树栽培品种为 GG100、I144 和 VM 58，空间布局为（3 × 2）+20 米（434 棵/公顷）、（2 × 2）+9 米（909 棵/公顷）和 9 × 2 米（556 棵/公顷）。2011 年和 2015 年，在 SSP 采集了 0 至 20 厘米和 0 至 40 厘米深的土壤样本，以测定土壤有机碳储量。与 2011 年相比，2015 年的土壤有机碳储量增加了 38.5%（1.11 亿克/公顷-1 对 80.7 百万克/公顷-1），这意味着每年有 6.22 百万克/公顷-1 的碳汇，表明碳储量逐年增加。树冠下的堆积物比树与树之间的堆积物多，这可能是由于树冠下的生物量下降较多。林-牧系统显示出相似的枯落物和土壤有机碳量，这表明所评估的安排具有相似的碳储存能力。

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来源期刊

Agroforestry Systems 农林科学-林学

CiteScore

5.30

自引率

9.10%

发文量

审稿时长

4.5 months

期刊介绍： Agroforestry Systems is an international scientific journal that publishes results of novel, high impact original research, critical reviews and short communications on any aspect of agroforestry. The journal particularly encourages contributions that demonstrate the role of agroforestry in providing commodity as well non-commodity benefits such as ecosystem services. Papers dealing with both biophysical and socioeconomic aspects are welcome. These include results of investigations of a fundamental or applied nature dealing with integrated systems involving trees and crops and/or livestock. Manuscripts that are purely descriptive in nature or confirmatory in nature of well-established findings, and with limited international scope are discouraged. To be acceptable for publication, the information presented must be relevant to a context wider than the specific location where the study was undertaken, and provide new insight or make a significant contribution to the agroforestry knowledge base