Variables related to soil fertility in successional agroforestry systems: Serras do Sudeste, RS, Brazil

IF 2 3区农林科学 Q2 AGRONOMY

Agroforestry Systems Pub Date : 2024-08-05 DOI:10.1007/s10457-024-01050-2

Daniel Hanke, Shirley Grazieli da Silva Nascimento, Deborah Pinheiro Dick, Renan Costa Beber Vieira, Leonardo Paz Deble

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Abstract

Successional agroforestry systems have the capacity to increase soil fertility and restore degraded ecosystems. The objective of this study was to investigate the influence of agroforestry systems, at different stages of ecological succession, on the dynamics of chemical and physical soil fertility attributes in the Brazil South region. Soil samples were collected under five different conditions: (i) Control (T) = initial system (without agroforestry); (ii) SAF1 = agroforestry with 1 year of development; (iii) SAF3 = agroforestry with 3 years of development; (iv) SAF7 = agroforestry with 7 years of development; and (v) reference system (naturally regenerating forest with 30 years). Subsequently, determinations/calculations were carried out for chemical attributes/parameters (exchangeable Ca²⁺, Mg²⁺, K⁺, Na⁺, P, Al³⁺, H⁺, sum of bases, effective and potential cation exchange capacity, cation exchange saturation with bases and Al³⁺), physical attributes (soil bulk density, particle density, total porosity, and moisture), and soil physicochemical properties (pH H₂O, pH in saline solutions, and SMP method), as well as chemical element stocks were calculated based on soil mass in each sampled layer. Results showed an increase in pH, total porosity, and nutrient stocks with the systems' development time, accompanied by a decrease in acidity components. The increase in soil fertility is directly related to the increase in soil organic matter content.

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继代农林系统中与土壤肥力相关的变量：巴西苏达斯特塞拉斯

演替农林系统具有提高土壤肥力和恢复退化生态系统的能力。本研究旨在调查巴西南部地区不同生态演替阶段的农林系统对土壤化学和物理肥力属性动态的影响。土壤样本在五种不同条件下采集：(i) 对照组 (T) = 初始系统（无农林业）；(ii) SAF1 = 发展 1 年的农林业；(iii) SAF3 = 发展 3 年的农林业；(iv) SAF7 = 发展 7 年的农林业；(v) 参考系统（30 年的自然再生林）。随后，对化学属性/参数（可交换的 Ca2+、Mg2+、K+、Na+、P、Al3+、H+、碱基总和、有效和潜在阳离子交换容量、碱基和 Al3+ 的阳离子交换饱和度）进行了测定/计算、物理属性（土壤容重、颗粒密度、总孔隙度和水分）、土壤理化属性（pH H2O、盐溶液中的 pH 值和 SMP 法）以及化学元素储量都是根据每个取样层的土壤质量计算得出的。结果表明，随着系统开发时间的延长，pH 值、总孔隙度和养分储量都有所提高，同时酸度成分有所降低。土壤肥力的提高与土壤有机质含量的增加直接相关。

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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