Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/18050
Tipo: Artigo
Título: Microbial activity of soil cultivated with corn in association with weeds under different fertility management systems
Autor(es): Melo, Christiane
Fialho, Cíntia
Faria, Autieres
Neto, Manoel
Saraiva, Douglas
Costa, Maurício
Ferreira, Lino
Ferreira, Francisco Affonso
Abstract: Interactions between weeds and soil microorganisms can give them a competitive advantage over crops. This study assessed the biomass and microbial activity of soil cultivated with weeds and corn (Zea mays L.) in monoculture and in competition under different fertility management systems. The experiment considered four soil fertility management systems (calcium and magnesium silicate + fertilization; limestone + fertilization; no correction source + fertilization; no correction source + no fertilization) and 12 crops (five competition arrangements between corn and weeds Urochloa brizantha (Hochst. ex A. Rich.) R.D. Webster, lpomoea grandifolia (Dammer) O'Donell, Conyza canadensis (L.) Cronquist, Hyptis suaveolens (L.) Poit., and Bidens pilosa L. plus the six species in monoculture and bare soil. After 60 d coexisting in a greenhouse, soil samples were collected to determine microbial biomass, respiration rate, and metabolic quotient. Soils cultivated with B. pilosa and Z. mays+U. brizantha showed higher microbial biomass. Cultivation of B. pilosa and Z. mays+H. suaveolens provided greater energy efficiency to maintain microbial cells. Biomass and microbial activity were altered by plant species, coexistence, and soil fertility management. Calcium and magnesium silicate, as well as limestone similarly influenced biomass and respiration rate of soil cultivated with most species. For some crops, the Si source was better than limestone to promote lower specific activity of the edaphic microbiota. The change in the microbial activity of soil can be a strategy used by the species to minimize the effects of competition.
Palavras-chave: Calcium and magnesium silicate
Soil microorganism/weed interaction
Interference
Limestone
Microbial biomass
Soil metabolic quotient
Zea mays.
Editor: Chilean journal of agricultural research
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.4067/S0718-58392014000400015
http://www.locus.ufv.br/handle/123456789/18050
Data do documento: 21-Ago-2014
Aparece nas coleções:Fitotecnia - Artigos

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