Atributos químicos e qualidade da matéria orgânica do solo em sistemas de colheita de cana-de-açúcar com e sem queima

Signor, Diana; Czycza, Rodrigo Vianei; Milori, Débora Marcondes Bastos Pereira; Cunha, T. J. F.; Cerri, Carlos Eduardo Pellegrino

doi:10.1590/s0100-204x2016000900042

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…Also, the systems that increase soil organic matter improve the soil quality and creates better condition of agricultural development (Signor et al, 2016). But how this dynamic occurs, aggregation/OC/fractions of inorganic P, in the main land uses of the Atlantic forest is not yet well explained.…”

Section: Introductionmentioning

confidence: 99%

Distribution of C and inorganic phosphorus fractions in different aggregate sizes under forestry, agroforestry system and pasture

Rocha

Ribeiro

Mesquita

et al. 2018

J. Soil Sci. Plant Nutr.

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The objective of this study was to evaluate the organic carbon (OC) distribution and inorganic phosphorus (P) fractions on different soil aggregates classes under forestry fragment of Atlantic Forest, pasture and agroforestry managed for a long period. Soil samples were collected at depths of 0.00-0.10, 0.10-0.20 and 0.20-0.60 m, and the aggregate stability analysis was performed at each depth. The OC and the inorganic P fractions (P bic readily available, NaHCO 3 0.5 mol L -1 ; P Na1 moderately available, NaOH 0.1 mol L -1 ; and P Na2 restricted availability, NaOH 0.5 mol L -1 ) were determined in the respective classes of soil aggregates 4-2, 2-1, 1-0.5, 0.5-0.25 mm.Soil under forestry fragment showed higher OC contents and regardless the land use, highest values of inorganic P were found in the aggregates > 1 mm. Forestry showed highest levels of P bic , while agroforestry showed the highest levels of P Na1 , and pasture had highest values of P Na2 .

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Section: Introductionmentioning

confidence: 99%

Distribution of C and inorganic phosphorus fractions in different aggregate sizes under forestry, agroforestry system and pasture

Rocha

Ribeiro

Mesquita

et al. 2018

J. Soil Sci. Plant Nutr.

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“…Todos esses aspectos de produção e tratos culturais utilizados pelos produtores da região influenciam na sazonalidade da ocorrência de focos de calor, indicando que as práticas de queima estão fortemente relacionadas com a própria dinâmica de produção agrícola do município. Os efeitos ambientais do fogo são alvos de diversos estudos, uma vez que apresentam impactos diretos na qualidade do solo, produtividade agrícola e na biodiversidade (CABRAL et al, 2013;ARAÚJO, 2016;SIGNOR et al, 2016;ALVINO-RAYOL & RAYOL, 2019;SOUSA et al, 2019). Porém, é importante ressaltar, também, os impactos das queimadas na saúde humana (GONÇALVES et al, 2012).…”

Section: Resultsunclassified

Análise Espaço-Temporal De Focos De Calor No Município De São Francisco Do Pará, Nordeste Paraense

Cristovão¹,

Rayol²

2021

Act. Tecn.

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Os desmatamentos e as queimadas são duas das maiores questões ambientais enfrentadas pelo Brasil atualmente, uma vez que se utiliza com frequência o sistema de agricultura baseado no processo de derruba-e-queima da vegetação.Através de tecnologias de geoprocessamento é possível estudar a dinâmica de ocorrência de queimadas a fim de fornecer base para a criação de medidas de controle e prevenção. Dessa forma, este trabalho objetivou estudar a distribuição espacial e temporal de focos de calor no município de São Francisco do Pará.A quantificação de focos de calor foi realizada utilizando dados do Instituto Nacional de Pesquisas Espaciaisenquanto que a pluviosidade média foi obtida através do programa InfoClima, da EMBRAPA. Foi possível verificar que os focos de calor concentram-se entre os meses de junho e dezembro, distribuídos por toda extensão do município. Quando comparados aos valores de precipitação total, verifica-se que a média de ocorrência de focos de calor é maior nos meses que antecedem o período chuvoso, época comumente utilizada para limpeza de terreno. Espera-se que os resultados obtidos no presente estudo possam contribuir com uma melhor compreensão da dinâmica socioeconômica e ambiental da região.

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“…In view thereof, conservation-focused agricultural practices have to be implemented to avoid soil and water losses by erosion, avoid soil drying and high temperatures that affect the microbial biomass activity, maintain and/ or increase the nutrient use efficiency, nutrient cycling, carbon input in the soil, and increasing the soil production potential in the long term. In sugarcane fields, mainly where mechanical management is used, the no-tillage (direct planting) system can be implemented, with planting under the trash of a previous unburned ratoon crop and stubble of crops or green manure residues (Bolonhezi;Gonçalves, 2015;Canellas et al, 2007;Cherubin et al, 2019;Santos Júnior et al, 2015;Signor et al, 2016;Tavares et al, 2010;Oliveira et al, 2017;Tenelli et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Alternative sugarcane production for conservation of sandy soils: sugarcane straw, intercropping and nitrogen

et al. 2020

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The expansion of sugarcane cultivation in the Center-South region of Brazil has led to the use of, mainly, areas with low-yielding sandy soils. In this context, the objectives of this study were to evaluate the maintenance of the sugarcane straw, Brachiaria grass intercropping in sugarcane fields and nitrogen fertilization and on sandy soils in the state of Paraná. The field experiment was installed in the Paranavaí-PR city, at a unit of the Interuniversity Network for the Development of the Sugarcane Sector (RIDESA). The soil was classified as Latossolo Vermelho-amarelo distrófico. The treatments in the plant cane stage, consisting of four nitrogen rates (0, 50, 100 and 150 kg ha-1) and monoculture or Brachiaria grass intercropping in sugarcane fields were arranged in a 4x2 factorial design. At plant cane harvest, the effect of unremoved straw was included as a new factor to be evaluated in the ratoon crops. The treatments in the ratoon crops were arranged in a 4x2x2 factorial design, consisting of four nitrogen rates (0, 50, 100 and 150 kg ha-1), monoculture or Brachiaria grass intercropping in sugarcane fields and the presence or removal sugarcane straw. The sugarcane straw on soil surface can increase the agronomic development of sugarcane and, the other hands, Brachiaria grass intercropping in sugarcane fields can reduce. Sugarcane was responsive to N rates and, in the highest rates, compensated the sugarcane straw absence and reduced Brachiaria grass intercropping competition.

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Atributos químicos e qualidade da matéria orgânica do solo em sistemas de colheita de cana-de-açúcar com e sem queima

Cited by 13 publications

References 18 publications

Distribution of C and inorganic phosphorus fractions in different aggregate sizes under forestry, agroforestry system and pasture

Distribution of C and inorganic phosphorus fractions in different aggregate sizes under forestry, agroforestry system and pasture

Análise Espaço-Temporal De Focos De Calor No Município De São Francisco Do Pará, Nordeste Paraense

Alternative sugarcane production for conservation of sandy soils: sugarcane straw, intercropping and nitrogen

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