Atributos físicos de um Hapludox em função de sistemas de produção integração lavoura-pecuária (ILP), sob plantio direto

Spera, S. T.; Santos, H. P. dos; Fontaneli, R. S.; Tomm, G. O.

doi:10.4025/actasciagron.v32i1.926

Cited by 10 publications

(6 citation statements)

References 2 publications

(14 reference statements)

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“…As a result, SOC increases in depth, which benefits other functions of soils. Such improvements include enhanced soil aggregation, microbiological activity, soil water storage, and infiltration rate, and reduced erosion, with positive effects on aggregate stability, porosity, and soil density [53]. Due to its low density, OM contributed to the increase in soil total porosity in ICLSs compared with the control (with no vegetation cover).…”

Section: Discussionmentioning

confidence: 99%

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

de Brito Neto,

Chaves,

da Silva

et al. 2023

Land

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Soil health is directly related to sustainable development goals (SDGs) and can be affected by inadequate management practices. In this work, soil edaphic respiration and changes in microbial biomass promoted by cover crops in an integrated crop–livestock system (ICLS) were evaluated using soil health indicators with the respirometry method. The design was completely randomized in a 3 × 6 factorial arrangement, and multivariate principal components analysis (PCA) was performed according to MANOVA. Edaphic respiration was determined based on the respirometry technique. The results showed that edaphic soil respiration was significant in the nine evaluation periods, demonstrating the importance of grass cover in edaphic respiration arising from the biological activity of microorganisms, which is directly related to the amount of soil organic carbon. The cover crops increased soil organic matter and consequently microbial respiratory activity.

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Section: Discussionmentioning

confidence: 99%

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

de Brito Neto,

Chaves,

da Silva

et al. 2023

Land

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“…O solo sob mata constitui um sistema não perturbado (Spera et al, 2010), protegido de ações antrópicas (Melloni et al, 2008;Moreira et al, 2011): a vegetação heterogênea apresenta uma grande quantidade e variedade de raízes superficiais e profundas e não sofreu os efeitos do trânsito de máquinas e equipamentos, como mencionaram Torres et al (Azevedo & Dalmolin (2006); e densidade do solo (DS) < 1,0 g cm -3 (Goedert, 2005)), para os atributos estudados: mais altos valores de microporosidade e porosidade total e menor densidade do solo, nas três camadas avaliadas, e, também valores dentre os mais elevados para porcentagem de agregados maiores que 2 mm e diâmetro médio ponderado na camada de 0-0,20 m.…”

Section: /7unclassified

Atributos físicos do solo em quatro sistemas de uso da terra em São Carlos, SP

Nicodemo

Borges

Souza

2018

Agraria

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RESUMO:O trabalho teve como objetivo de avaliar o efeito de quatro sistemas de uso da terra: dois sistemas agroflorestais (sistema silviagrícola e sistema silvipastoril), pastagem solteira de Urochloa decumbens e mata nativa, sobre as características físicas do solo, em São Carlos, SP. Foram analisadas a densidade de solo, macroporosidade, microporosidade e porosidade total, e a estabilidade de agregados, nas camadas de 0-0,05, 0,05-0,20 e 0,20-0,40 m, no ano de 2015. O delineamento experimental utilizado foi o inteiramente casualizado com quatro repetições. Os dados foram submetidos ao teste F e as médias foram comparadas pelo teste de Tukey. Foi aplicada a análise multivariada utilizando o método de Ward e a distância Euclideana com variáveis padronizadas. Constatou-se que o solo sob mata nativa apresenta melhores condições físicas que as áreas com as demais formas de uso da terra. As características físicas do solo nos sistemas agroflorestais não variaram em função da distância da faixa de árvores. A pastagem solteira apresentou compactação do solo na camada de 0-0,40 m. Considerando o conjunto de variáveis estudadas, foi possível separar três grupos, por similaridade do conjunto de atributos físicos do solo: (1) mata, (2) sistema silviagrícola e (3) aquele formado pela pastagem solteira e pelo sistema silvipastoril.Palavras-chave: porosidade do solo; sistema silviagrícola; sistema silvipastoril. Physical soil attributes in four land use systems at São Carlos County, São Paulo State, BrazilABSTRACT: The objective of this work was to evaluate the effect of four land use systems: two agroforestry systems (agrisilviculture and silvopastoral system), single pasture of Urochloa decumbens and native forest, on the physical characteristics of the soil, in São Carlos, SP, Brazil. Soil density, macroporosity, microporosity and total porosity, and the stability of aggregates, in the layers of 0-0.05, 0.05-0.20 and 0.20-0.40 m, we were analyzed in the year 2015. The experimental design was a completely randomized design with four replications. The data were submitted to the F test and the means were compared by the Tukey test. The multivariate analysis was applied using the Ward method and the Euclidean distance with standardized variables. It was verified that the soil under native forest presents better physical conditions than the areas with other forms of land use. The physical characteristics of the soil in the agroforestry systems did not vary according to the distance of the trees. The conventional pasture presented soil compaction in the 0-0.40 m layer. Considering the set of variables studied, it was possible to separate three groups, by similarity of the set of physical attributes of the soil: (1) secondary native forest, (2) agrisilviculture and (3) that formed by conventional pasture and silvopastoral system.

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“…The need to increase production has led to an increased use of nitrogen (N) fertilization because most of the soils present low N concentrations and do not meet plant growth demands (Spera, Santos, Fontaneli, & Tomm, 2009). However, the excessive use of N fertilizers, in addition to increasing production costs, has detrimental effects on the environment due to nitrate leaching into water courses (Walker et al, 2011) and volatilizations losses.…”

Section: Introductionmentioning

confidence: 99%

Inoculation with <i>Azospirillum brasilense</i> on corn yield and yield components in an integrated crop-livestock system

Schaefer

Martin

Pizzani³

et al. 2018

Acta Sci. Agron.

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Inoculation of corn with diazotrophic bacteria reduces the need for nitrogen fertilization and mitigates environmental contamination risks due to the bacteria's biological nitrogen-fixation capacity. The aim of the present study was to evaluate the effect of corn seed inoculation with Azospirillum brasilense under different nitrogen levels and post-grazing residual heights. The experiment was performed in two growing seasons and conducted in an integrated crop-livestock system for the 2014/15 and 2015/16. A factorial randomized block experimental design with subdivided plots and three factors. The main plots varied in post-grazing residual height (0.10, 0.20, 0.30 m, continuous grazing, or no grazing), the subplots varied in inoculation (with or without seed inoculation), and the sub-subplots varied in nitrogen level (0, 75, 150, 225, or 300 kg ha-1 of N). The higher post-grazing residual height associated an A. brasilense and nitrogen fertilization resulted in increased corn biomass and production and yield. At the 300 kg dose of N, the highest grain yield was obtained under different post-grazing heights (10.15 Mg ha-1) and in the absence of the bacterium (10.00 Mg ha-1). Azospirillum brasilense helps plant growth and yield but does not replace the effect of N fertilization.

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Atributos físicos de um Hapludox em função de sistemas de produção integração lavoura-pecuária (ILP), sob plantio direto

Cited by 10 publications

References 2 publications

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

Soil Health in an Integrated Production System in a Brazilian Semiarid Region

Atributos físicos do solo em quatro sistemas de uso da terra em São Carlos, SP

Inoculation with <i>Azospirillum brasilense</i> on corn yield and yield components in an integrated crop-livestock system

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