Propriedades físicas do solo em sistemas de manejo na integração agricultura-pecuária

Costa, André da; Albuquerque, Jackson Adriano; Mafra, Álvaro Luiz; Silva, Franciani Rodrigues da

doi:10.1590/s0100-06832009000200001

Cited by 27 publications

(42 citation statements)

References 24 publications

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“…These results are similar to Sandini et al (2008) and Costa et al (2009) and show that black oat grazing kept at good sward height does not compromise the summer crop yield. Thus, it may increase the summer crop yield.…”

Section: Resultssupporting

confidence: 92%

“…are higher than those reported by Farinatti et al (2006), in a study w ryegrass pasture. Decomposition and nitrogen release in areas with and without grazing and its influence on corn Thus, lower carbon/nitrogen (C/N) ratio in the grazed plant material, associated with N fertilization, may result in higher net soil N mineralization by reducing microbial demand for N during plant biomass decomposition (DUBEUX et al, 2006;COSTA et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

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Decomposition and nitrogen release in areas with and without grazing and its influence on corn

et al. 2013

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This study aimed to evaluate the dry matter decomposition and N release from black oat residues and dung from goats, as well as its influence on corn yield grown in succession under increasing levels of N applied in topdressing. At winter, treatments consisted of different levels of a dietary supplement corresponding to 0, 5, 10 and 15 g kg -1 of body weight of females, Boer goats grazing oat cv. IAPAR 61 and a treatment without grazing. During the winter period were evaluated: forage sward, mass and its forage production, stocking rate, animal live weight gain, content of mineral N in the soil. At the end of grazing period, dry matter decomposition rate and N release from black oat residual biomass and animal dung were evaluated. At summer, main plots were divided into sub-plots and N applied at increasing levels over the corn crop (0, 50, 100 and 150 kg ha -1 of N as urea). During this period, corn yield was evaluated. Grazed areas at winter under increasing levels of supplementation resulted in an increase of animal production and increased dry matter decomposition rate and N release from the pasture when compared to ungrazed areas. At the ungrazed areas, it was necessary to apply 150 kg ha -1 of N in sidedress to ensure the same corn yield obtained at the grazing treatments without N application. Key words: Black oat, grain yield, supplementation, decomposition rate ResumoO objetivo do presente estudo foi verificar a decomposição e liberação de N dos resíduos vegetais de aveia e dejetos de caprinos, bem como sua influência no rendimento do milho cultivado em sucessão sob crescentes doses de N aplicados em cobertura. No inverno os tratamentos se constituíram do uso de suplemento alimentar correspondente a 0, 5, 10 e 15 g kg -1 do peso vivo de fêmeas de caprinos da raça Bôer em pastejo de aveia preta cv. IAPAR 61 e um tratamento sem pastejo. Durante o período de inverno foram avaliados: altura, massa e produção da forragem; carga e ganho de peso animal e teores de N-mineral no solo. Após o término do período de pastejo foi avaliada a decomposição da matéria seca e taxa de liberação de N da forragem e do esterco. No verão as parcelas foram subdivididas e doses crescentes de N foram aplicadas em cobertura na cultura do milho (0, 50, 100 e 150 kg ha -1 de N na forma de uréia). Nesta fase, foi avaliado o rendimento do milho. As áreas pastejadas no inverno sob 1 Profs. do Instituto Federal do Paraná, IFPR, Palmas, PR.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Decomposition and nitrogen release in areas with and without grazing and its influence on corn

et al. 2013

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“…Costa et al (2009) constataram que o revolvimento do solo com arado e grade ou escarificador reduz o teor de carbono de compostos orgânicos, a estabilidade de agregados, a densidade e a capacidade de campo, porém, aumenta a porosidade total, a macroporosidade e a capacidade de aeração em comparação com o sistema de plantio direto. Dantas et al (2012) por sua vez, concluíram que o cultivo anual resulta em maior degradação física do solo, se comparado ao cultivo perene, em função da redução na condutividade hidráulica no solo e na estabilidade de agregados maiores que 2,0 mm, com elevação nos valores de densidade do solo.…”

Section: Estrutura Do Solounclassified

Uso e manejo do solo e seus impactos sobre a qualidade física

Stefanoski¹,

Santos²,

Marchão

et al. 2013

Rev. bras. eng. agríc. ambient.

104

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RESUMOO uso racional do solo tem sido objeto de estudo e discussões em função da busca de alternativas tecnológicas que possibilitem o manejo correto do solo e, consequentemente, uma agricultura sustentável. Objetivou-se, com este trabalho, levantar dados sobre a qualidade físico-hídrica e sua relação com os impactos gerados pelo manejo do solo por meio de uma revisão bibliográfica, contribuindo para melhor conhecimento das informações disponíveis na literatura. O uso de indicadores de qualidade física do solo permite designar práticas adequadas de manejo do solo. Uma análise crítica dos indicadores de qualidade física do solo revela que o índice proposto por Reynolds et al. (2002) possui limitações quanto ao uso, o intervalo hídrico ótimo apresenta bons resultados e o índice S necessita de mais trabalhos com o uso de h (tensão de água no solo) como variável independente. Assim, os indicadores de qualidade física do solo são úteis para avaliação do estado de conservação do solo possibilitando a gestão segura dos recursos naturais; todavia, os indicadores existentes apresentam, como inconvenientes, a elevada complexidade de execução e os custos de obtenção, o que configura oportunidade para o desenvolvimento de novos indicadores de qualidade física do solo.Palavras-chave: sistemas de manejo, compactação, estrutura do solo, indicadores de qualidade física Soil use and management and its impact on physical quality ABSTRACT The rational use of the soil has been the subject of study and discussion due to search for technological alternatives that allow the adequate management of the soil and consequently, a sustainable agriculture. The objective of this study was to collect data about the hydro-physical quality and its relation to the impacts caused by soil management through a literature review, contributing to better understanding of existing information in the literature. The use of indicators of physical quality of soil permit the designation of most appropriate soil management practices, especially those exposed to intensive agriculture. A critical analysis of indicators of soil quality show that the index proposed by Reynolds et al. (2002) has limitations about its use, the optimal hydric interval presents good results, and the S index needs more works with the use of h (soil-water suction) as the independent variable. Thus, the indicators of physical quality of soil are useful for evaluating the state of soil conservation, to making possible the secure management of natural resources, however, the existing indicators present very high complexity of the implementation and acquisition costs, which configures opportunity for the development of new indicators of physical quality of soil.

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“…According to Costa et al (2009), the soil physical properties are not changed in integrated croplivestock with annual winter pastures in conservation tillage, including grazing. On the other hand, Bertol et al (2004) reported that soil physical properties are changed by management, and that systems that raise the soil organic carbon content also increase the mean weight diameter (MWD) of aggregates.…”

Section: Introductionmentioning

confidence: 99%

Physical properties and particle-size fractions of soil organic matter in crop-livestock integration

Tirloni¹,

Vitorino

Bergamin

et al. 2012

Rev. Bras. Ciênc. Solo

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SUMMARYCrop-livestock integration represents an interesting alternative of soil management, especially in regions where the maintenance of cover crops in notillage systems is difficult. The objective of this study was to evaluate soil physical and chemical properties, based on the hypothesis that a well-managed croplivestock integration system improves the soil quality and stabilizes the system. The experiment was set up in a completely randomized design, with five replications. The treatments were arranged in a 6 x 4 factorial design, to assess five crop rotation systems in crop-livestock integration, and native forest as reference of soil undisturbed by agriculture, in four layers (0.0-0.05; 0.05-0.10; 0.10-0.15 and 0.15-0.20 m). The crop rotation systems in crop-livestock integration promoted changes in soil physical and chemical properties and the effects of the different systems were mainly detected in the surface layer. The crops in integrated croplivestock systems allowed the maintenance of soil carbon at levels equal to those of the native forest, proving the efficiency of these systems in terms of soil conservation. The systems influenced the environmental stability positively; the soil quality indicator mineral-associated organic matter was best related to aggregate stability.Index terms: crop rotation, no-tillage system, soil quality, soil carbon, aggregate stability.( (0,0-0,05, 0,05-0,10, 0,10-0,15 e 0,15-0,20 m

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Propriedades físicas do solo em sistemas de manejo na integração agricultura-pecuária

Cited by 27 publications

References 24 publications

Decomposition and nitrogen release in areas with and without grazing and its influence on corn

Decomposition and nitrogen release in areas with and without grazing and its influence on corn

Uso e manejo do solo e seus impactos sobre a qualidade física

Physical properties and particle-size fractions of soil organic matter in crop-livestock integration

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