Soil microbial biomass in an agroforestry system of Northeast Brazil

Rodrigues, Rosane Cláudia; Araújo, Rogério César Pereira de; Costa, Claudionete Abreu; Lima, Antonio José Temístocles de; Oliveira, Maria Elizabete de; Júnior, José Antônio Alves Cutrim; Santos, Francisco Naysson de Sousa; Araújo, Jocélio S.; Santos, Vera Maria dos; Araújo, Ademir Sérgio Ferreira de

doi:10.17138/tgft(3)41-48

Cited by 24 publications

(19 citation statements)

References 30 publications

(7 reference statements)

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“…Soil microbial biomass C differed seasonally, and this pattern may be attributed to different soil humidity (Silva et al, 2012) or temperature (Rodrigues et al, 2015). During both seasons, the undisturbed Cerrado sensu stricto showed higher soil microbial biomass.…”

Section: Discussionmentioning

confidence: 97%

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Biological properties of disturbed and undisturbed Cerrado sensu stricto from Northeast Brazil

et al. 2017

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The aim of this study was to measure soil microbial biomass and soil surface fauna in undisturbed and disturbed Cerrado sensu stricto (Css) from Sete Cidades National Park, Northeast Brazil. The following sites were sampled under Cerrado sensu stricto (Css) at the park: undisturbed and disturbed Css (slash-and-burn agricultural practices). Total organic and microbial biomass C were higher in undisturbed than in disturbed sites in both seasons. However, microbial biomass C was higher in the wet than in the dry season. Soil respiration did not vary among sites but was higher in the wet than in the dry season. The densities of Araneae, Coleoptera, and Orthoptera were higher in the undisturbed site, whereas the densities of Formicidae were higher in the disturbed site. Non-metric multidimensional scaling analysis separated undisturbed from disturbed sites according to soil biological properties. Disturbance by agricultural practices, such as slash-and-burn, probably resulted in the deterioration of the biological properties of soil under native Cerrado sensu stricto in the Sete Cidades National Park.Keywords: soil microbial biomass, soil fauna, sustainability, soil disturbance. Propriedades biológicas de Cerrado sensu stricto preservado e não preservado do Nordeste do BrasilResumo O objetivo do estudo foi avaliar as propriedades biológicas do solo em área de Cerrado sensu stricto preservadas e não preservadas do Parque Nacional de Sete Cidades, Nordeste do Brasil. Os seguintes sites sob Cerrado sensu stricto (Css) foram avaliados: preservado (UND) e não preservado (DIS). O C orgânico total e da biomassa microbiana foram maiores na área preservada do que na não preservada em ambas estações seca e chuvosa. Entretanto, o C da biomassa microbiana foi maior na estação chuvosa do que na seca. A respiração do solo não variou entre as áreas, mas foi maior na estação chuvosa. As densidades de Araneae, Coleoptera e Ortoptera foram maiores na área preservada, enquanto as densidades de Formicidae foram maiores na área não preservada. A analise de escalonamento não-métrico separou a área preservada da não-preservada de acordo com as propriedades biológicas. Os distúrbios no solo pelas atividades agrícolas, como corte-e-queima, resultaram na deterioração das propriedades biológicas do Cerrado nativo no Parque Nacional de Sete Cidades.Palavras-chave: biomassa microbiana do solo, fauna do solo, sustentabilidade, distúrbio no solo.

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Section: Discussionmentioning

confidence: 97%

“…The means and standard deviations of these groups are nevertheless calculated. Only those four invertebrate groups were analyzed (Araneae, Coleoptera, Formicidae, Orthoptera) for which the sampling method was adequate (Araujo et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

Biological properties of disturbed and undisturbed Cerrado sensu stricto from Northeast Brazil

et al. 2017

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“…According to Rodrigues et al (2015), in silvopastoral systems formed by Marandu grass with different densities of palm trees, the silvopastoral systems favor the soil microbial biomass and activity, because they reported that the microbial C, microbial N, microbial biomass: organic carbon ratio showed higher values in soils at high density of babassu palm trees, which favors the soil mineralization, increasing the fertility.…”

Section: Resultsmentioning

confidence: 99%

<b>Grazing behavior and spatial distribution of feces of Young bulls in silvopastoral systems and Marandu monoculture in the Pre-Amazon region

Araújo

Rodrigues

Costa

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT.The objective was to evaluate the grazing behavior and the spatial distribution of feces of F1 young bulls from the cross between Nellore and Guzera on pastures of Urochloa brizantha cv. Marandu in silvopastoral systems composed of babassu palm (Attalea speciosa) and Marandu monoculture in the Pre-Amazon region of the state of Maranhão. Animals were evaluated in four systems consisting of 0, 80, 131, 160 palms ha -1 , characterizing monoculture (mono), low density of palm trees (LD), medium density of palm trees (MD) and high density of palm trees (HD) during the rainy (RE) and dry (DE) periods. Five animals (repetitions) were used in each system, with 231-303 days of age and 180±15 kg body weight. Determinations of behavioral patterns were made by instant sampling, at 10 min intervals. In each system, we demarcated 50 squares of 100 m 2 , which served as useful area to evaluate the dispersion of feces. The grazing behavior was influenced by the sward structure, which, in turn, was influenced by densities of palm trees, due to shading. The distribution of feces was affected by both the presence of babassu plantations and periods. The silvopastoral systems made the environment more pleasant to animals, since activities considered more stressful and avoided during the daytime were performed by animals of these environments, unlike animals in the monoculture system. Keywords: babassu, sward structure, dispersal, idle, palm trees, rumination.Comportamento de pastejo e distribuição espacial de fezes de tourinhos em sistemas silvipastoris e monocultura de capim-Marandu na região pré-amazônica RESUMO. Objetivou-se avaliar o comportamento de pastejo e a distribuição espacial de fezes de tourinhos F1 do cruzamento de Nelore com Guzerá em pastagens de Urochloa brizantha cv. Marandu em sistemas silvipastoris compostos por palmeiras de babaçu (Attalea speciosa) e em monocultivo de capim-Marandu na região pré-amazônica maranhense. Os animais foram avaliados em quatro sistemas, sendo 0, 80, 131, 160 palmeiras ha -1 , caracterizando monocultura (mono), baixa densidade de palmeiras (BDP), média densidade de palmeiras (MDP) e alta densidade de palmeiras (ADP), respectivamente, durante os períodos chuvoso (PC) e seco (PS). Foram utilizados cinco animais (repetições) em cada sistema, os animais tinham entre 231 e 303 dias de vida e peso vivo de 180±15 kg. As medidas dos padrões comportamentais foram realizadas por colheita instantânea, a intervalos de 10 min. Em cada sistema foram demarcados 50 quadrados de 100 m 2 , que serviram como área útil para avaliar a dispersão das fezes. Observou-se que o comportamento de pastejo foi influenciado pela estrutura do pasto, que por sua vez foi influenciado pelas densidades de palmeiras pelo sombreamento e a distribuição das fezes foi influenciada tanto pela presença dos babaçuais quanto pelos períodos avaliados. Os sistemas silvipastoris tornaram o ambiente mais agradável aos animais, visto que as atividades consideradas mais estressantes e que são evitadas durante o dia foram reali...

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“…The results showed that the use of the agroforestry system increased SOC content and may be associated with an increase in plant litter, which improves SOC content (Sousa et al, ; Albaladejo et al, ; Rodrigues et al, ). The agroforestry system presents high and constant litter deposition compared with the pasture systems, which contributes to the increase in SOC (Stockmann et al, ).…”

Section: Discussionmentioning

confidence: 99%

The Impact of Pasture Systems on Soil Microbial Biomass and Community‐level Physiological Profiles

et al. 2016

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The intensive use of soil for pasture establishment has promoted land degradation. However, well-managed pasture systems may contribute to the improvement of the soil biological properties. The aim of this study was to evaluate the soil microbial biomass, enzymes activity, and catabolic diversity under six different pastures: Andropogon gayanus, Brachiaria brizantha, Panicum maximum, Cynodon dactilon, agroforestry system, and native vegetation. Soil microbial biomass was estimated by the fumigation-extraction method, while enzyme activity was determined through substrate use. The catabolic diversity was evaluated by the community-level physiological profiling method. Microbial biomass C was higher in the soils under the agroforestry system and native vegetation, whereas microbial biomass N was higher in the soil under Brachiaria. Acid phosphatase activity and fluorescein diacetate hydrolysis were higher in agroforestry system and native vegetation, respectively. Dehydrogenase activity was higher in the soil under Brachiaria and Cynodon. Richness and diversity of community-level physiological profiling were higher in the soils under the agroforestry system and native vegetation. The highest numbers of C sources metabolized by microorganisms were found in the agroforestry system and native vegetation. This study showed that soil microbial community from pasture systems subjected to different management showed different biomass, activity, and catabolic diversity.

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Soil microbial biomass in an agroforestry system of Northeast Brazil

Cited by 24 publications

References 30 publications

Biological properties of disturbed and undisturbed Cerrado sensu stricto from Northeast Brazil

Biological properties of disturbed and undisturbed Cerrado sensu stricto from Northeast Brazil

<b>Grazing behavior and spatial distribution of feces of Young bulls in silvopastoral systems and Marandu monoculture in the Pre-Amazon region

The Impact of Pasture Systems on Soil Microbial Biomass and Community‐level Physiological Profiles

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