Propriedades físicas do solo em área sob milho em monocultivo ou consorciado com leguminosas de verão

Chieza, Emerson Dalla; Lovato, Thomé; Araújo, Ednaldo da Silva; Tonin, Jonatan Maicon Antônio

doi:10.1590/s0100-06832013000500028

Cited by 11 publications

(8 citation statements)

References 25 publications

(20 reference statements)

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“…The aggregates fracture occurs in the planes of weakness derived from the cracks that form zones of less soil strength. The number of total pores and the bulk density usually present low variability in different surveys, similar to that obtained by Castagnara et al (2012), Chieza et al (2013) and Torres et al (2015). On the other hand, the PR presented high variability, except for the area under pasture ( Table 1).…”

Section: Resultssupporting

confidence: 85%

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Lima

Paiva

Nunes

et al. 2018

Agraria

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Changes in the soil structural quality have caused alterations in root growth and agricultural yield. With the purpose of finding critical values of physical parameters and alternative, viable and suitable ways of minimize the soil degradation, this study aimed at quantifying aggregate tensile strength (TS), friability (F), bull density (Bd), total porosity (Tp), macroporosity (Ma), penetration resistance (PR) and total organic carbon (TOC). Relations were established to estimate the structural quality of some parameters of an Ultisol under different uses. The study was carried out on a farm, in the rural area of RS, inserted in the Arroio Moreira waterbasin, Brazil. Disturbed and undisturbed samples were collected from the 0.00 to 0.10 m layer. Regarding TS and soil use, 900 samples were selected, totalling 2700 aggregates. Undisturbed samples (135) were collected for the evaluation of Bd, porosity and PR. The TOC was quantified using 45 aggregates through the dry combustion method. All physical parameters with exception of F are important in monitoring the structural quality.The lowest values of TS, PR and Bd were verified in the soil under fallow, and the highest ones in the soil under pasture. An inverse relation between TS and TOC and between Bd and TOC was verified. Critical values of Bd and TS to crop development might be estimated from the PR.

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Section: Resultssupporting

confidence: 85%

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Lima

Paiva

Nunes

et al. 2018

Agraria

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“…A adubação verde promove melhorias das características físicas do solo (Chieza et al, 2013), favorece a reciclagem de nutrientes e pode incorporar N ao sistema por meio da fixação biológica de nitrogê-nio (FBN), o que a torna boa alternativa (Castro et al, 2004;Silva et al, 2011;Leal et al, 2012).…”

Section: Introductionunclassified

Produção e aspectos econômicos de milho consorciado com Crotalária juncea L. em diferentes intervalos de semeadura, sob manejo orgânico

et al. 2017

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Submetido em 01/10/2014 A busca por sistemas produtivos mais sustentáveis é um desafio necessário. Avaliaram-se formas de manejo do consórcio entre milho e Crotalaria juncea L., que possibilitem otimizar a produção "in situ" de massa vegetal, sem comprometer o potencial produtivo do cereal. Realizaram-se experimentos em épocas distintas: primavera-verão (experimento 1) e outono-inverno (experimento 2), em Seropédica -RJ, no período de 11/2010 a 09/2011. Os tratamentos para o experimento 1 foram: C. juncea, semeada: sete dias antes, simultaneamente com, aos 14 e aos 28 dias após a cultura do milho, respectivamente, para T1, T2, T3 e T4. Além desses, T5-milho em monocultivo e T6-milho em monocultivo + N. Os tratamentos para o experimento 2 foram: C. juncea semeada: sete dias antes, simultaneamente com, aos sete e aos 14 dias após a cultura do milho, respectivamente para TA, TB, TC e TD. Além desses, TE-milho em monocultivo e TF-milho em monocultivo + N. Para T1, T2, TA e TB a C. juncea foi roçada aproximadamente 30 dias após a emergência e sua palhada utilizada como fonte de N para o milho; já para T3, T4, T6, TC, TD e TF foi utilizada a torta de mamona como fonte de N. Na primavera-verão, em T2, a produção de grãos do cereal não diferiu da produção do monocultivo com adubação nitrogenada, com reflexo positivo no balanço econômico. No outono-inverno, a presença do adubo verde semeado 14 dias após o milho resultou em benefícios ao sistema. A

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“…Hybrid corn was chosen since it is frequently used in the region for grain production. A cover plant (jack bean) was used due its N 2 fixing capacity, high vegetable matter production, ability to improve soil physical properties, and substantial soil cover (Castro et al, 2011;Maetens et al, 2012;Chieza et al, 2013).…”

Section: Methodsmentioning

confidence: 99%

“…One effective conservation practice is intercropping, which involves cover plants and crop systems, by including two or more crops with different architectures and vegetative cycles growing simultaneously. Intercropping is a very common practice in tropical areas, and some of the benefits from this practice include improvement in soil and water quality, increased nutrient fixation and cycling efficiency, and better protection against the impact of raindrops and consequent soil erosion by water (Troeh et al, 1980;Connolly et al, 2001;Snapp et al, 2005;Gómez et al, 2009;Maetens et al, 2012;Chieza et al, 2013;Rieger et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Relationship Among Crop Systems, Soil Cover, and Water Erosion on a Typic Hapludox

Lima

Silva

Quinton

et al. 2018

Rev. Bras. Ciênc. Solo

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Several soil conservation practices are used to reduce water erosion and ensure sustainable agriculture. An effective crop management practice is intercropping, in which two or more crops with different architectures and vegetative cycles are grown simultaneously in the same area. We hypothesized that intercropping of corn and jack-bean increases soil cover and reduce soil erosion by water in comparison to monocropping. The objective of this study was to evaluate the effects of different crop systems on soil cover and on soil erosion by water. Soil and water losses from a Typic Hapludox were measured under the following systems: corn cultivation (CO), jack-bean cultivation (JB), intercropping of corn and jack-bean (IC), and bare soil (BS), as a reference for maximum erosion rates. For each crop system, erosion plots with dimensions of 12 × 4 m were set up in the field on a 0.12 m m -1 slope gradient. The experiment was carried out under natural rainfall, over three crop seasons (November to March) from 2011 to 2014. The soil cover index of the systems was monitored during crop growth, and rainfall erosivity for the crop seasons was calculated according to the EI 30 index to interpret soil and water losses. A set of linear mixed models was fitted to relate soil losses to rainfall erosivity, crop systems, and soil cover. The average rainfall erosivity in the study area was 6,132 MJ mm ha -1 h -1 per crop season. The results indicate that water losses are directly related to erosivity and are less influenced by soil cover and cultivation systems than the soil losses. A linear maximum value of the soil cover index was achieved 70 days after sowing. Intercropping exhibited greater soil cover than single crops. Total soil losses from the three seasons display the trend: BS > CO > JB > IC. The best fitted model of the linear mixed models indicates that soil loss responses are strongly correlated with rainfall erosivity and soil cover, which nullified the influence of the crop systems in the model.

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Propriedades físicas do solo em área sob milho em monocultivo ou consorciado com leguminosas de verão

Cited by 11 publications

References 25 publications

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Produção e aspectos econômicos de milho consorciado com Crotalária juncea L. em diferentes intervalos de semeadura, sob manejo orgânico

Relationship Among Crop Systems, Soil Cover, and Water Erosion on a Typic Hapludox

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