Microbial and enzymatic activity in soil after organic composting

Vinhal-Freitas, Isabel Cristina; Wangen, Dalcimar Regina Batista; Ferreira, Adão de Siqueira; Corrêa, Guilherme Resende; Wendling, Beno

doi:10.1590/s0100-06832010000300017

Cited by 26 publications

(17 citation statements)

References 42 publications

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“…In fact, high increase in the conventional management system occurred to the detriment of conservationist systems such as no-tillage (Vinhal-Freitas et al, 2010). Current research did not corroborate with above results.…”

Section: Resultscontrasting

confidence: 71%

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Impacts of integrated crop-livestock-forest on microbiological indicators of soil

Stieven

Oliveira

Santos

et al. 2014

Agraria

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The integrated systems are management practices that maximize the area use through the integration of crops with forest species. Impacts on the microbial biomass in an integrated crop-livestock-forest (iCLF) system are evaluated. The latter consists of simple, double and triple rows of eucalyptus and soil with soybean/pasture alternation with a native forest for comparison. Soil was collected at a depth of 0-0.05 m during the rainy and dry periods (March and October/2010). Evaluated microbiological indexes were biomass carbon, basal respiration, metabolic and microbial quotients, activity of acid and alkaline phosphatase enzymes and β-glucosidase. General means of biomass microbial carbon and microbial quotients were higher during the dry period, whereas variables basal respiration and metabolic quotients were higher during the rainy period, and in both cases activities in iCLF soil with single eucalyptus rows. Enzyme activities were more stable in integrated crop-livestock-forest soil between the two periods and slightly higher than the other systems. As a rule, iCLF systems had a positive impact on the microbiology of soil.Key words: enzyme activity, integrated systems, microbial biomass carbon, soil microorganisms Impactos da integração lavoura-pecuária-floresta sobre indicadores microbiológicos do solo RESUMOOs sistemas de integração são práticas de manejo que buscam maximizar a utilização da área, integrando grandes culturas com espécies florestais. O objetivo deste trabalho foi avaliar os impactos na biomassa microbiana em um sistema de integração Lavoura-Pecuária-Floresta (iLPF) com linhas simples, duplas e triplas de eucalipto e, para comparação, um solo sob rotação soja/pastagem e sob mata nativa. O solo foi coletado na profundidade de 0-0,05 m, nos períodos de chuva e seca (março e outubro/2010). Os indicadores microbiológicos avaliados foram o carbono da biomassa, respiração basal, quociente metabólico e microbiano, atividade das enzimas fosfatase ácida e alcalina e β-glicosidase. A média geral do carbono da biomassa microbiana e o quociente microbiano foram superiores no período de seca em relação à chuva enquanto as variáveis respiração basal e quociente metabólico foram superiores no período de chuva; em ambos os casos as atividades sob solo de iLPF linha simples de eucalipto. No solo sob iLPF as atividades enzimáticas se mantiveram mais estáveis entre os períodos e ligeiramente superiores aos demais sistemas; no geral, os sistemas de iLPF apresentaram impactos positivos na microbiota do solo.Palavras-chave: atividade enzimática, sistemas integrados, carbono da biomassa microbiana, microrganismos do solo

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Section: Resultscontrasting

confidence: 71%

“…The iCLF system may be an efficient alternative for the improvement of the chemical properties of soil since it favors soil stability with the addition of organic matter and provides favorable conditions for microbial activities (Vinhal-Freitas et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Impacts of integrated crop-livestock-forest on microbiological indicators of soil

Stieven

Oliveira

Santos

et al. 2014

Agraria

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“…Although many studies have examined enzymes in Brazilian soils (Vinhal-Freitas et al 2010, 2012, Pavanelli and Araújo 2010, they have not explored Michaelis-Menten constants. Kinetic parameters can provide important information on the enzymatic mechanisms and soil functions in ecosystems (Nannipieri et al 1982, Marx et al 2001, Vinhal-Freitas et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Assessment and kinetics of soil phosphatase in Brazilian Savanna systems

Ferreira

Espíndola

Campos

2016

An. Acad. Bras. Ciênc.

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The activity and kinetics of soil phosphatases are important indicators to evaluate soil quality in specific sites such as the Cerrado (Brazilian Savanna). This study aimed to determine the activity and kinetic parameters of soil phosphatase in Cerrado systems. Soil phosphatase activity was assessed in samples of native Cerrado (NC), no-tillage (NT), conventional tillage (CT) and pasture with Brachiaria brizantha (PBb) and evaluated with acetate buffer (AB), tris-HCl buffer (TB), modified universal buffer (MUB) and low MUB. The Michaelis-Menten equation and Eadie-Hofstee model were applied to obtain the kinetic parameters of soil phosphatase using different concentrations of p-nitrophenol phosphate (p-NPP). MUB showed the lowest soil phosphatase activity in all soils whereas AB in NC and NT presented the highest. Low MUB decreased interferences in the assessment of soil phosphatase activity when compared to MUB, suggesting that organic acids interfere on the soil phosphatase activity. In NC and NT, soil phosphatase activity performed with TB was similar to AB and low MUB. K m values from the Michaels-Menten equation were higher in NC than in NT, which indicate a lower affinity of phosphatase activity for the substrate in NC. V max values were also higher in NC than in NT. The Eadie-Hofstee model suggests that NC had more phosphatase isoforms than NT. The study showed that buffer type is of fundamental importance when assessing soil phosphatase activity in Cerrado soils.

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“…The application of organic compounds results in improvement of the microbial biomass and its activity in the soil, compared to the use of chemical fertilizers [14] [15]. The application of bokashis in potato induced significant responses up to a dose of 400 g•m −2 , with yield of 24.5 t•ha −1 ; however, it did not influence the dry matter content and the incidence of physiological disorders [16].…”

Section: Introductionmentioning

confidence: 99%

Microbial Attributes of Infested Soil Suppressive to Bacterial Wilt by Bokashi Amendments

Fontenelle¹,

Lopes²,

Lima³

et al. 2015

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Bacterial wilt, caused by Ralstonia solanacearum, is a major tomato disease in tropical and subtropical regions. It is difficult to be managed, since no single measure confers significant contribution for disease control. Among the cultural practices available for disease management, bokashi provides nutrients to the plants, increasing the microbial biomass, improving the quality of the soil and, in some cases, protecting plants against diseases. In this work, we evaluated the effect of three different bokashis (Embrapa-BE; poultry-BP and cattle-BC) in two soils artificially and naturally infested with R. solanacearum, on the suppression of bacterial wilt in tomato. Disease control is discussed upon measurements on the contents of microbial biomass carbon (MBC), on total organic carbon (TOC), on basal respiration (BR), on metabolic coefficient (qCO2) and on microbial coefficient (qMIC). The experiment was implemented in greenhouse, with completely randomized design and factorial arrangement of treatments 2 × 3 (two soils × three bokashis). Disease suppression, assessed through wilt incidence 20 and 30 days after transplanting, was better observed in the naturally infested soil, where BP and BE were more efficient in controling the disease. TOC contents were higher in the artificially infested soil compared to that naturally infested, whereas the qMIC presented higher value for the naturally infested soil, which had greater contribution of MBC. Higher rates of BR and qCO2 were observed for the naturally infested soil with BC, probably indicating high plant stress caused by the disease in this treatment. Moreover, a high and positive correlation coefficient was found between the variables qCO 2 and the number of infected plants at 30 days after transplanting. In the artificially infested soil, a negative correlation was found between the number of infected plants at 20 days after transplanting and TOC.

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Microbial and enzymatic activity in soil after organic composting

Cited by 26 publications

References 42 publications

Impacts of integrated crop-livestock-forest on microbiological indicators of soil

Impacts of integrated crop-livestock-forest on microbiological indicators of soil

Assessment and kinetics of soil phosphatase in Brazilian Savanna systems

Microbial Attributes of Infested Soil Suppressive to Bacterial Wilt by Bokashi Amendments

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