巴西半干旱区卡廷加林下退化对土壤属性的影响

IF 0.6 4区 农林科学 Q4 FORESTRY Revista Arvore Pub Date : 2023-01-23 DOI:10.1590/1806-908820230000002
R. Macedo, Letícia Moro, É. Lambais, G. Lambais, A. Bakker
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引用次数: 1

摘要

各方面的人类活动促进了巴西半干旱区(SAB)的土壤退化。结果,据报道,生产力和土壤履行其生态功能的能力遭受了重大损失。研究了巴西大Campina Grande灌丛土壤退化对土壤属性和性质的影响。对0 ~ 20 cm土层样品进行物理(粒度分布和土壤密度)、化学(酸度、电导率、常量营养素、土壤有机质)和微生物属性(微生物生物量碳(C-BMS)、土壤基础呼吸(RBS)和代谢商(qCO2))研究,数据提交Mann-Whitney检验和主成分分析(PCA)。人类对CAE的作用促进了地表腐质层的暴露。这一层排水不完善,营养物质和有机质含量低,碱度高,导致植被再生缓慢。CAE处理的碳储量和微生物活性显著低于CAD处理。退化导致支持性生态系统服务(养分循环和初级生产)和调节(侵蚀控制和气候调节)的丧失。研究结果可用于了解南北极地区低复杂性(高退化)景观的动态,并可作为框架,寻找恢复南北极地区广泛退化和/或荒漠化地区生产能力的战略。
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EFFECTS OF DEGRADATION ON SOIL ATTRIBUTES UNDER CAATINGA IN THE BRAZILIAN SEMI-ARID
ABSTRACT Anthropic activities in their various aspects have promoted soil degradation in the Brazilian semi-arid region (SAB). As a result, significant losses in productivity and in the ability of soils to fulfill their ecological functions have been reported. The present study investigated the effects of degradation on soil attributes and properties under dense (CAD) and sparse (CAE) shrubby Caatinga in Campina Grande, PB, Brazil. Samples from the 0-20 cm layer of soil were investigated via physical (particle size distribution and soil density), chemical (acidity, electrical conductivity, macronutrients, soil organic matter) and microbiological attributes (microbial biomass carbon (C-BMS), basal respiration of the soil (RBS) and metabolic quotient (qCO2) Data were submitted to the Mann-Whitney Test and Principal Component Analysis (PCA). Anthropic actions on the CAE promoted the exposure of the saprolitic layer on the surface. This layer has imperfect drainage, low levels of nutrients and organic matter and high sodicity, which contributes to the slow regeneration of vegetation. Carbon stock and microbial activity are significantly lower in CAE compared to CAD. Degradation resulted in losses of supporting ecosystem services (nutrient cycling and primary production) and regulation (erosion control and climate regulation). The results can be used to understand the dynamics of landscapes of low complexity (high degradation) in the SAB and serve as a framework to find strategies to restore the productive capacity of extensive degraded and/or desertified areas in the SAB.
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来源期刊
Revista Arvore
Revista Arvore FORESTRY-
CiteScore
1.00
自引率
0.00%
发文量
32
审稿时长
4-8 weeks
期刊介绍: A Revista Árvore é um veículo de comunicação científica da Sociedade de Investigações Florestais – SIF. O jornal é de acesso gratuito, revisado por pares, que publica bimestralmente trabalhos científicos originais no campo da Ciência Florestal. As áreas temáticas para publicação são: Ambiência e Conservação da Natureza, Manejo Florestal, Silvicultura e Tecnologia da Madeira e Utilização de Produtos Florestais. A política editorial visa manter alta conduta ética em relação à publicação e aos seus funcionários, rigor na qualidade dos artigos científicos, seleção de revisores qualificados, respeito profissional aos autores e processo de tomada de decisão imparcial. A Revista Árvore publica artigos apenas em inglês. Artigos de revisão podem ser publicados se houver uma discussão relevante resumindo o estado da arte sobre o assunto. A revisão estrita da literatura não é aceita.
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