Variabilidade espacial das frações granulométricas e da salinidade em um Neossolo Flúvico do semi-árido

Souza, Eliane Helena Alvim de; Montenegro, Abelardo Antônio de Assunção; Montenegro, Suzana Maria Gico Lima; Santos, Thaís Emanuelle Monteiro dos; Andrade, Tafnes da Silva; Pedrosa, Elvira M. R.

doi:10.1590/s0103-84782008000300016

Cited by 11 publications

(18 citation statements)

References 10 publications

(12 reference statements)

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“…According to MCBRATNEY & WEBSTER (1986), the spherical model is one of the most frequent in the adjustment to the semivariograms of soil attributes. However, this result differs from that found by SOUZA et al (2008), who obtained the Gaussian model with the best fit to the semivariograms of the three granulometric fractions.…”

Section: Resultscontrasting

confidence: 99%

“…Similar results were found by VIEIRA (1997) who obtained ranges of 15m to clay and silt in a Dystrophic Purple Latosol under conventional prepare. However, the range of values obtained by SOUZA et al (2008) andSILVA et al (2010) for sand, clay and silt in a Fluvic Neosol diverged substantially and showed marked differences between the most superficial layer (0-0.20m) and the most deeper (0.20-0.40 and 0.40-0.60m), possibly deriving from the different physical characteristics of each soil, although they were the same type of soil.…”

Section: Resultsmentioning

confidence: 88%

“…The deeper layer (0.40-0.60m) demonstrated a moderate degree of spatial dependence for sand and silt fraction and low-grade to clay. CAMPOS et al (2007) also found moderate degree of spatial dependence for the three granulometric fractions of soil and diverge from SOUZA et al (2008) that found a strong degree of dependence for these same variables. Instead, SILVA et al (2010) observed weak spatial dependence for sand, silt and clay, regardless of depth study.…”

Section: Resultsmentioning

confidence: 94%

“…CAMPOS et al (2007), in an attempt to characterize the spatial variability of physical and hydric attributes of a Hydromorphic Carbic Spodosol in the Zona da Mata in the state of Pernambuco, Brazil, also found low CV values for the fractions of sand (3.12), silt (10.24) and clay (11.73), differentiating the present study only in the clay fraction. Moreover, SOUZA et al (2008), examining the spatial dependence of the granulometric fractions of an alluvial soil under agricultural cultivation in an irrigated alluvial lot, found mean values of CV for granulometric fractions of sand (26,08), silt (16.01) and clay (14, 81). SILVA et al (2010), working with the same soil type, also observed average CV values for the three granulometric fractions.…”

Section: Resultsmentioning

confidence: 99%

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Effects of vinasse application under the physical attributes of soil covered with sugarcane straw

Costa¹,

Pedrosa

Rolim

et al. 2013

Eng. Agríc.

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ABSTRACT:Areas under vinasse application have been associated to favorable physical conditions for root development, aeration, infiltration and water movement in soil profile. This study aimed to evaluate changes on physical attributes of soil under sugarcane straw after vinasse application in two sugarcane growing areas (Area 1 and Area 2) under mechanized management in the state of Paraíba, Brazil. In each area, the samples were collected in the 0-0.20, 0.20-0.40 and 0.40-0.60m layers of the soil, in 36 points, distributed in a 10×10m mesh, one day before and 40 days after vinasse application. The data were submitted to multivariate analysis with repeated measures and geostatistics. The vinasse application decreased soil density and increased total porosity in both Areas and increased organic matter in Area 2. In Area 1 occurred pure nugget effect for the fractions of sand, silt and clay, independent of soil layer. In Area 2, this effect was verified mostly at superficial layers, except for the fraction of clay that presented a moderate degree of spatial dependence.KEYWORDS: residue use, Saccharum, geostatistics, soil moisture, soil density. EFEITOS DA APLICAÇÃO DE VINHAÇA SOB OS ATRIBUTOS FÍSICOS DO SOLO COBERTO COM PALHIÇO DE CANA-DE-AÇÚCARRESUMO: Áreas submetidas à aplicação de vinhaça têm sido associadas às condições físicas favoráveis ao desenvolvimento radicular, aeração, infiltração e movimento de água no perfil do solo. O trabalho teve como objetivo avaliar variações nos atributos físicos de solo após fertirrigação com vinhaça, em duas áreas, denominadas de Área 1 e Área 2, cultivadas com cana-de-açúcar com cobertura de palhiço sob manejo mecanizado na Paraíba, Brasil. Em cada área, as amostras foram coletadas nas camadas de 0-0,20; 0,20-0,40 e 0,40-0,60 m do solo, em 36 pontos, distribuídos em malha de10×10 m, um dia antes e 40 dias após a aplicação da vinhaça. Os dados foram submetidos a análises multivariadas com medidas repetidas e geoestatística. A adição da vinhaça ao solo promoveu redução da densidade do solo e aumento da porosidade total nas duas Áreas, e aumento da matéria orgânica na Área 2. Na Área 1, ocorreu puro efeito pepita para as frações areia, silte e argila, independentemente da camada de solo. Na Área 2, esse efeito foi verificado, principalmente nas camadas mais superficiais, com exceção da fração argila, que apresentou moderado grau de dependência espacial.PALAVRAS-CHAVE: aproveitamento de resíduo, Saccharum, geoestatística, umidade do solo, densidade do solo.

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Section: Resultscontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

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Effects of vinasse application under the physical attributes of soil covered with sugarcane straw

Costa¹,

Pedrosa

Rolim

et al. 2013

Eng. Agríc.

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“…The gaussian model was the most prevalent model in the works of Machado et al (2007) and Souza et al (2008) that studied physical variables of a Red Latosol and a Fluvisol, respectively. This model has a large reach and its landing presents equal values to the exponential model; it is a transitive model, appropriate for modelling continuous phenomena (Isaaks and Srivastava, 1989).…”

Section: Resultsmentioning

confidence: 99%

Spatial variability of soil physical and chemical aspects in a Brazil nut tree stand in the Brazilian Amazon

Guerreiro¹,

JÃonior²,

Santos³

et al. 2017

Afr. J. Agric. Res.

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The Brazil nut is considered one of the noblest trees of the Amazon biome and contains social, ecologic and economic importance to this region. The study of the spatial variance of the edaphic properties in native nut trees can direct future researches about more efficient samplings. The Geostatistics is the methodology utilized for this type of study, once that it considers the structural and random characteristics of a variable spatially distributed. This work sought to get a higher knowledge about the distribution of the nutrients in the soil, verifying the relationship with the occurrence of this species, to thereby provide subsidies to future forest management and maintenance/enlargement of the productivity in these areas. The soil samples were collected from 30 × 30 m on the line, in all of the lines in part of the study, totaling 60 samples. All of the points were georeferenced. The preparation of the samples for the sample preparation for the chemical analysis and the methods and calculations to determine the physicochemical variables studied were described by Nogueira and Souza (2005). The statistical and geostatistical analysis were conducted using the R computational environment, version 3.2.2. Most of the studied variables presented defined level. For the physical variables, there was predominance of the adjustment to the model of the gaussian variogram, follower by the spherical model. In the case of the chemical variables, there were two occurrences for each adjustment model (spherical, exponential and gaussian). The variables that best presented spatial relation with the occurrence of Brazil nut trees were the silt, clay, macroporosity, pH, phosphorus, zinc and copper.

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Improving agricultural water management in the semi-arid region of Brazil: experimental and modelling study

Montenegro

Ragab

2009

Irrig Sci

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Variabilidade espacial das frações granulométricas e da salinidade em um Neossolo Flúvico do semi-árido

Abstract: RESUMO A análise dos atributos físicos e da salinidade de solos em áreas irrigadas é de extrema importância para elaboração e implantação de propostas de manejo. Com o objetivo de avaliar a dependência espacial das frações

Cited by 11 publications

References 10 publications

Effects of vinasse application under the physical attributes of soil covered with sugarcane straw

Effects of vinasse application under the physical attributes of soil covered with sugarcane straw

Spatial variability of soil physical and chemical aspects in a Brazil nut tree stand in the Brazilian Amazon

Improving agricultural water management in the semi-arid region of Brazil: experimental and modelling study

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