Seasonal response of edaphic bioindicators using green manure in Brazilian semi-arid conditions Sazonalidade de resposta de bioindicadores edáficos utilizando adubação verde no semi-árido brasileiro

The goal of this work was to evaluate the response of edaphic macrofauna, soil microbial biomass carbon, soil basal respiration, metabolic quotient and labile carbon of fumigated soil in a Fluvic Neosol. The experimental design was in randomized blocks, with five treatments (four green manure mix an...

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Bibliographic Details
Main Authors: Márcio Sampaio Pimentel, Rubens Silva Carvalho, Lindete Míria Vieira Martins, Adriano Victor Lopes da Silva
Format: Article
Language:English
Published: Universidade Federal do Ceará 2011-12-01
Series:Revista Ciência Agronômica
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Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000400002
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Summary:The goal of this work was to evaluate the response of edaphic macrofauna, soil microbial biomass carbon, soil basal respiration, metabolic quotient and labile carbon of fumigated soil in a Fluvic Neosol. The experimental design was in randomized blocks, with five treatments (four green manure mix and one control) and four replications, and subsequent planting of melon (Cucumis melo L.) under semi-arid conditions in Juazeiro, Bahia State, Brazil, from August 2006 to August 2007. Soil samples were collected at a depth of 0-10 cm at 6 days before, and 117; 215 and 354 days after green manure mix planting. The results indicate that none of the attributes presented a significant difference for the treatments, but changed significantly in relation to the time of sample collection. The higher levels of soil microbial biomass carbon and labile carbon of fumigated soil were measured 117 days after planting. Soil microbial biomass carbon was inversely correlated with soil basal respiration and metabolic quotient, which increased as of 215 days after planting. At 354 days after planting, the edaphic macrofauna presented the highest density, richness, diversity and uniformity. Ants and beetles were most abundant in the areas studied.<br>O objetivo deste trabalho foi avaliar a resposta da macrofauna edáfica, carbono da biomassa microbiana, respiração do solo, quociente metabólico e carbono lábil de solo fumigado em Neossolo Flúvico. O delineamento experimental foi em locos ao acaso com cinco tratamentos (quatro combinações de coquetéis vegetais e testemunha) e quatro repetições, e subseqüente plantio de melão na região semi-árida de Juazeiro, Bahia, Brasil, entre os meses de agosto de 2006 a agosto de 2007. Foram realizadas quatro coletas de solo na profundidade de 0-10 cm aos: seis dias antes do plantio do coquetel vegetal, 117; 215 e 354 dias após plantio do coquetel vegetal. Os resultados obtidos indicam que todos os atributos não apresentaram diferença significativa para os tratamentos com coquetel vegetal, mas diferiram significativamente em função da época da coleta. Maiores teores de carbono da biomassa microbiana e carbono lábil de solo fumigado foram obtidos aos 117 dias após o plantio. Carbono da biomassa microbiana correlacionou-se inversamente à respiração do solo e ao quociente metabólico, que aumentaram a partir de 215 dias após plantio. Aos 354 dias após plantio, a macrofauna edáfica apresentou maior densidade, riqueza, diversidade e uniformidade, tendo formigas e besouros sido os animais mais abundantes.
ISSN:0045-6888
1806-6690