Relationship between redness index of soil and carbon stock of aerial biomass in Cerrado vegetation/Relacao entre o indice de avermelhamento do solo e o estoque de carbono na biomassa aerea da vegetacao de Cerrado
The color variety of soil is response of its physical, chemical, biological and mineralogical composition. The Munsell color system is based on an objective color evaluation in which it is possible to evaluate different color soil factors such as the presence of iron oxides, particle size, and accum...
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Published in: | Ciência florestal Vol. 23; no. 4; p. 783 |
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Main Authors: | , , , , |
Format: | Journal Article |
Language: | Spanish |
Published: |
Universidade Federal de Santa Maria
01-10-2013
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Subjects: | |
Online Access: | Get full text |
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Summary: | The color variety of soil is response of its physical, chemical, biological and mineralogical composition. The Munsell color system is based on an objective color evaluation in which it is possible to evaluate different color soil factors such as the presence of iron oxides, particle size, and accumulated organic material. The objective of this study was to identify the relation between the redness index (IAV) of soil and the amount of carbon content present in the aerial part of Cerrado vegetation. The study was conducted in seven cities in western Bahia state, in native areas of Cerrado. The determination o soil color was made in the field, with moist soil samples, using the Munsell color chart. From the evaluation of hue, value and chroma, the redness index (IAV) was calculated. The estimation of carbon stock above ground was carried out from: trunk and branches, both living and dead trees by the allometric equation developed in Cerrado areas. The redness index of soil, from the layer 0.00 to 0.20 m, has a significant and directly proportional relationship with the carbon stock of above ground biomass of Cerrado vegetation. This may be extrapolated to calculate the carbon stock (EC) by the redness index (IAV) of soil by the equation [EC = 0.4936 x IAV + 4.2286 (-1.5%)]. The practicality of sampling of data by IAV with Munsell chart, and the reliability of data fit by results of residual error less than 5%, make that this relationship may be used for academic and corporative in carbon stocks estimation for use in forest and environmental management. The EC variation between the studied physiognomies is mainly by distinct density of tree individuals per hectare. The variation of IAV in studied areas is due to the accumulated organic matter on the soil surface, the mineral content and drainage capacity, according to inferences of literature, and this reflecting the different colors of soil in the studied phytophysiognomies. Keywords: soil color; phytophysiognomies; iron content, Munsell color chart. A variacao da cor do solo e uma resposta relacionada principalmente a sua composicao fisica, quimica, biologica e mineralogica. O sistema de cores de Munsell e baseado na cor de forma objetiva, em que, atraves dela e possivel avaliar diversos fatores do solo, como a presenca de oxidos de ferro, granulometria e material organico. O objetivo do trabalho foi realizar uma relacao e identificacao entre o indice de avermelhamento (IAV) com o estoque de carbono presente na parte aerea da vegetacao de Cerrado. O trabalho foi realizado em sete municipios do Oeste Baiano, em areas nativas de Cerrado, nas fitofisionomias: Floresta de Galeria, Cerradao, Cerrado stricto sensu e Campo Sujo. A determinacao da cor foi efetuada no campo em amostras de solo umido, empregando-se a caderneta de Munsell. A partir da avaliacao da matiz, valor e croma, foi calculado o indice de avermelhamento (IAV). A estimativa do estoque de carbono acima do solo foi realizada a partir dos compartimentos: tronco e galhos, tanto das arvores vivas quanto arvores mortas, atraves de uma equacao alometrica desenvolvida para o Cerrado. O indice de avermelhamento da cor do solo na camada de 0,00 a 0,20 m possui uma relacao diretamente proporcional e significativa com o estoque de carbono da biomassa aerea da vegetacao de Cerrado, podendo ser extrapolado o calculo do estoque de carbono (EC) pelo valor do indice de avermelhamento (IAV) do solo pela equacao [EC = 0,4936 x IAV + 4,2286 (-1,5%)]. A praticidade pela coleta dos dados de IAV, atraves da carta de Munsell e a confiabilidade do ajuste, dado pelo erro residual menor do que 5%, faz com que esta relacao possa ser utilizada para fins academicos e coorporativos em estimacao dos estoques de carbono para aplicacao em manejos florestais e ambientais. A variacao de EC entre as fitofisionomias estudadas faz-se, principalmente, pela distinta densidade de individuos arboreos por hectare. A variacao do IAV nas areas estudadas e devido a materia organica acumulada na superficie do solo, ao conteudo mineral e a capacidade de drenagem, segundo inferencias da literatura, refletindo assim nas distintas cores do solo nas fitofisionomias estudadas. Palavras-chave: cor do solo; fitofisionomia; teor de ferro, carta de cores de Munsell. |
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ISSN: | 1980-5098 |