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Biochar as substitute for organic matter in the composition of substrates for seedlings/Biochar como substituto de materia organica na formacao de substratos para mudas
In this study, we tested the hypothesis that pyrogenic carbon (biochar) has properties that enable it to replace fresh organic matter (cattle manure) in seedling substrates. These properties include specific electrophysiological interactions in soil-plant media, stability and longevity. The experime...
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Published in: | Acta scientiarum. Agronomy 2013-07, Vol.35 (3), p.333 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | Spanish |
Online Access: | Get full text |
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Summary: | In this study, we tested the hypothesis that pyrogenic carbon (biochar) has properties that enable it to replace fresh organic matter (cattle manure) in seedling substrates. These properties include specific electrophysiological interactions in soil-plant media, stability and longevity. The experiment was conducted in the nursery at the State University of Mato Grosso, located in the municipality of Nova Xavantina, between April and June 2011. The experimental design consisted of randomized blocks with ten treatments and four replicates, including a commercial substrate. Linear regression analysis showed a strong positive relationship between manure treatments and number of leaves, fresh and dry biomass, diameter, height and Dickson Quality Index at 30 and 40 days after sowing (DAS), with the exception of height at 30 DAS. There was no significant relationship for biochar dosage in any assessment for these parameters. The use of substrates with different dosages of cattle manure resulted in an increase of seedling quality compared to biochar and commercial substrates. The hypothesis that biochar can be substituted for fresh organic matter and is more stable in the substrate was not supported. Keywords: Solatium melongena, charcoal, cattle manure, seedling production. Neste trabalho hipotetizamos que o carvao pirogenico (biochar) apresenta propriedades capazes de substituir a materia organica fresca (esterco bovino) devido a acoes eletrofisiologicas no complexo solo-planta atribuidas a este material, tendo ainda a vantagem de ser mais estavel e duradouro. O experimento foi realizado no viveiro da Universidade do Estado de Mato Grosso, municipio de Nova Xavantina, no periodo de abril a junho de 2011. O delineamento experimental foi o de blocos casualizados, com dez tratamentos e quatro repeticoes, incluindo um substrato comercial. Testes de regressao linear demonstraram uma relacao fortemente positiva dos tratamentos de esterco com biomassa fresca e seca, numero de folhas, diametro, altura e Indice de Qualidade de Dickson aos 30 e 40 dias apos a semeadura (DAS), a excecao da altura aos 30 DAS. Por outro lado, nao foi verificada relacao significativa com as doses de biochar em nenhuma avaliacao para nenhum destes parametros. A utilizacao de substratos com diferentes doses de esterco bovino proporcionou melhora na qualidade das mudas superior ao biochar e ao substrato comercial. A hipotese de que o biochar substitui a materia organica fresca, com a vantagem da |
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ISSN: | 1679-9275 |
DOI: | 10.4025/actasciagron.v35i3.17542 |