RADICULAR BIOMASS AND ORGANIC CARBON OF THE SOIL IN FOREST FORMATIONS IN THE SOUTHERN AMAZONIAN MESOREGION

IF 0.6 4区农林科学 Q4 FORESTRY

Revista Arvore Pub Date : 2021-01-01 DOI:10.1590/1806-908820210000037

Ozias Cunha Bello, J. M. Cunha, M. Campos, Elilson Gomes de Brito Filho, M. G. Pereira, Guilherme Cardoso da Silva, Wener Silva Simões, Luís Antônio Coutrim dos Santos

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引用次数: 1

Abstract

ABSTRACT The soils of the Amazon region, despite being under one of the densest forests in the world, are mostly characterized by the low availability of nutrients, with litter being the main route of nutrient entry. The objective of this study was to quantify the biomass of fine roots in the dry and rainy seasons of the year, including the organic carbon of the soil, and to compare the results in different study environments. The study was carried out in environments of native forest and reforestation aged over 20 years, located in the municipality of Humaitá – AM state. To assess the root biomass, collections were carried out in two periods of the year: dry and rainy seasons. In each of the study areas, five trenches, 0.40 m deep by 0.40 m wide, were dug manually at depths of 0-5, 5-15, and 15-30 cm. For the organic carbon analysis, soil samples were collected in the form of clods at the same depths. The production of root biomass in the native forest environment occurred more intensely in the rainy season, reaching values of 8.19 t. ha-1, greater than 3.57 t. ha-1 found in reforestation. The density as a function of the soil volume showed that the highest concentration is found in the first 5 centimeters of depth, differing significantly in the 5-15 and 15-30 cm layers for native forest area. The organic carbon of the soil showed significance between the dry and rainy seasons for the natural forest environments and reforestation with genipap.

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南亚马逊河流域森林地层土壤根状生物量和有机碳

亚马逊地区的土壤，尽管是世界上最茂密的森林之一，但主要特征是养分有效性低，凋落物是养分进入的主要途径。本研究的目的是量化一年中旱季和雨季细根生物量，包括土壤有机碳，并比较不同研究环境下的结果。该研究是在humait - AM州市20多年的原生森林和重新造林环境中进行的。为了评估根系生物量，在一年中的两个时期进行收集:旱季和雨季。在每个研究区，人工挖掘了5条深0.40 m、宽0.40 m的沟，深度分别为0-5、5-15和15-30 cm。为了进行有机碳分析，在相同的深度以土块的形式收集土壤样本。原生森林环境的根系生物量生产在雨季更为强烈，达到8.19 t. ha-1，大于再造林环境的3.57 t. ha-1。土壤密度随土壤体积的变化规律表明，土壤密度在前5 cm土层最高，在5-15 cm和15-30 cm土层差异显著。土壤有机碳在旱季和雨季之间对天然林环境和再植具有显著意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Arvore FORESTRY-

CiteScore

1.00

自引率

0.00%

发文量

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.