Microbial soil quality indicators under different crop rotations and tillage management

Ferreira, Enderson Petrônio de Brito; Santos, H. P. dos; Costa, Janaina Ribeiro; De-Polli, Helvécio; Rumjanek, Norma Gouvêa

doi:10.1590/s1806-66902010000200002

Cited by 30 publications

(32 citation statements)

References 29 publications

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“…The study of associations between biological and chemical attributes is important for understanding the best management practices in order to improve soil quality. Moreover, soil macrofauna can act as an indicator of environment-soil changes (Lavelle, 1997), and microbial properties allied to total organic carbon content can be used to assess the sustainability of agricultural production (Ferreira et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Bioindicators of soil quality in coffee organic cultivation systems

Pimentel

De-Polli

Aquino

et al. 2011

Pesq. agropec. bras.

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-The objective of this work was to assess the effect of different coffee organic cultivation systems on chemical and biological soil characteristics, in different seasons of the year. The following systems were evaluated: coffee intercropped with one (CJ1), two (CJ2) or three (CJ3) pigeon pea (Cajanus cajan) alleys; coffee planted under full sun (CS); area planted with sweet pepper and snap bean in a conventional tillage system (AC); and secondary forest area (FFR). Row spacing in CJ1, CJ2, CJ3 and CS was 2.0x1.0, 2.8x1.0, 3.6x1.0, and 2.8x1.0 m, respectively. Soil samples were collected at 10-cm depth, during the four seasons of the year. The results were subjected to analysis of variance, principal component analysis, and redundancy analysis. There was an increase in edaphic macrofauna, soil basal respiration, and microbial quotient in the summer. Total macrofauna density was greater in CJ2 followed by CJ3, CS, CJ1, AC and FFR; Coleoptera, Formicidae, and Isoptera were the most abundant groups. There are no significant differences among the areas for soil basal respiration, and the metabolic quotient is higher in CJ1, CJ3, and FFR. Microbial biomass carbon and the contents of K, pH, Ca+Mg, and P show greater values in AC.Index terms: Cajanus cajan, Coffea arabica, edaphic macrofauna, metabolic quotient, shading, soil microbial biomass. Bioindicadores de qualidade do solo em sistemas de cultivo orgânico de caféResumo -O objetivo deste trabalho foi avaliar o efeito de diferentes sistemas de cultivo orgânico do cafeeiro sobre as características químicas e biológicas do solo, em diferentes estações do ano. Foram avaliados os sistemas: consórcio do cafeeiro com uma (CJ1), duas (CJ2) ou três (CJ3) linhas de guandu (Cajanus cajan); plantio do café a pleno sol (CS); área de plantio convencional de pimentão e feijão-vagem (AC); e área de floresta secundária (AFS). O espaçamento entre linhas em CJ1, CJ2, CJ3 e CS foi de 2,0x1,0, 2,8x1,0, 3,6x1,0, e 2,8x1,0 m, respectivamente. O solo foi amostrado na profundidade de 10 cm, nas quatro estações do ano. Os resultados foram submetidos à análise de variância, à análise de componentes principais e à análise de redundância. Houve aumento na macrofauna edáfica, na respiração basal do solo e no quociente microbiano, no verão. A densidade total da macrofauna foi maior em CJ2 seguidos por CJ3, CS, CJ1, AC e FFR; Coleoptera, Formicidae e Isoptera foram os grupos mais abundantes. Não há diferenças significativas entre as áreas quanto a respiração basal do solo, e o quociente metabólico é maior em CJ1, CJ3 e AFS. O carbono da biomassa microbiana e os teores de K, pH, Ca+Mg e P são maiores em AC.Termos para indexação: Cajanus cajan, Coffea arabica, macrofauna edáfica, quociente metabólico, sombreamento, biomassa microbiana do solo.

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Section: Introductionmentioning

confidence: 99%

Bioindicators of soil quality in coffee organic cultivation systems

Pimentel

De-Polli

Aquino

et al. 2011

Pesq. agropec. bras.

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“…There was high variability in the results for the variable MBC regarding the evaluated factors. Several studies have found differences in the content of MBC due to the plant cycle, adding crop residues, tillage systems, and crop rotation (Franchini et al, 2007;Ferreira et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

“…Soil microbial communities are influenced by many factors, including cover crops and soil management (Ferreira et al, 2010), development stage of plants and cultivars (Ferreira et al, 2008), fertilizer type (Carrera et al, 2007), and pesticide application (Ferreira et al, 2009). Studies about the interactions between plants and soil microorganisms are important to understand a variety of processes, such as nutrient cycling, ecosystem functioning, and C sequestration (Singh et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Microbial activity of soil cultivated with corn in association with weeds under different fertility management systems

Melo¹,

Fialho²,

Faria³

et al. 2014

Chilean J. Agric. Res.

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1Interactions 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, Ipomoea 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.

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“…Tubos contendo concentrações crescentes de carbono em mg mL -1 em solução de biftalato de potássio após a digestão, utilizadas para a construção da curva padrão em cada comprimento de onda. de onda a diferença numérica em favor do solo de mata, como esperado, corroborando Ferreira et al (2010). O C mic obtido por titrimetria, no Latossolo Vermelho proveniente da área de mata, apresentou-se significativamente maior em relação àqueles obtidos por espectrofotometria, nas duas profundidades.…”

Section: Resultsunclassified

Eficiência da quantificação do carbono da biomassa microbiana por espectrofotometria comparada ao método titrimétrico

Knupp

Ferreira

2011

Agraria

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Eficiência da quantificação do carbono da biomassa microbiana por espectrofotometria comparada ao método titrimétrico RESUMO Dentre os parâmetros de qualidade do solo, o carbono da biomassa microbiana (C mic ) é um dos mais utilizados, porém, o processo de análise mais adotado pelos laboratórios promove a geração de resíduos tóxicos. Com o objetivo de reduzir a geração de resíduos no processo analítico, foram realizados testes comparativos entre a titrimetria e a espectrofotometria para a quantificação do carbono microbiano, a partir de amostras de solo coletadas nas profundidades de 0-10 cm e 10-20 cm em três tipos de solo com características químicas, físicas e de manejo distintas. Os valores de C mic encontrados nos três solos pelo método espectrofotométrico foram semelhantes aos valores encontrados pela titrimetria. Quando se utilizou a espectrofotometria, houve redução de 42% na concentração de dicromato de potássio para a nova formulação da solução digestora e de cerca de 20% no tempo de execução da análise, além de redução no volume de resíduos tóxicos gerado. De acordo com os resultados obtidos, o uso da espectrofotometria apresentou-se vantajoso do ponto de vista ambiental, além de não diferir estatisticamente do método titrimétrico. Palavras-chave:Extração do carbono, indicadores biológicos, resíduos tóxicos.Quantification efficiency of the microbial biomass carbon by spectrophotometry assay as compared to the titrimetric method ABSTRACTAmong the soil quality parameters, the microbial biomass carbon (C mic ) is one of the most used; however, in contrast to the ecological use of this parameter, the analysis process used for C mic determination has a negative bias with regard to toxic waste generation. Aiming to reduce waste generation in the analytical process, comparative tests were performed between titrimetry and spectrophotometry for the quantification of microbial carbon from soil samples collected at 0-10 cm and 10-20 cm deep in three soil types with different chemical, physical and management characteristics. Results showed that the C mic values found by spectrophometry in the three soil types were similar to the values found by titrimetry. When spectrophotometry was used the potassium dichromate concentration was reduced in 42% for the new formulation of the digesting solution. Also, time execution was reduced in 20%, followed by the reduction in the volume of toxic waste generated. According to these results, the spectrophotometry process showed to be environmentally advantageous, besides, it did not differ statistically from the titrimetry method. Ler foneticamente

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Microbial soil quality indicators under different crop rotations and tillage management

Cited by 30 publications

References 29 publications

Bioindicators of soil quality in coffee organic cultivation systems

Bioindicators of soil quality in coffee organic cultivation systems

Microbial activity of soil cultivated with corn in association with weeds under different fertility management systems

Eficiência da quantificação do carbono da biomassa microbiana por espectrofotometria comparada ao método titrimétrico

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