Variabilidade espacial de parâmetros de crescimento da mamoneira e de atributos físico-químicos em Neossolo

Silva, Júlio J. N.; Montenegro, Abelardo Antônio de Assunção; Silva, Ênio Farias de França e; Júnior, Robertson V. P. Fontes; Silva, Ana P. N.

doi:10.1590/s1415-43662010000900003

Cited by 7 publications

(7 citation statements)

References 17 publications

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“…Considering the mean values, the average electrical conductivity of the saturation extract (EC) was equal to 2.05 dS m -1 at 0-0.2 m, and 1.57 dS m -1 for the 0.2-0.4 m layer. Silva et al (2010) found in the same study area and before the rainy season, EC values of 1.48 dS m -1 and 0.65 dS m -1 for the 0-0.2 and 0.2-0.4 m, respectively. These results confirm that the higher salts content is in the surface layer, even using sprinkler irrigation system.…”

Section: Resultssupporting

confidence: 61%

“…Authors cite Grego and Vieira (2005) and associate the strong spatial dependence of granularity fractions to excessive movement in the soil surface, which causes a change of its original structure and makes it similar nearby points. An important aspect to be highlighted is that the degree of spatial dependence considers both the variability between sampling points, as the uncertainty of the determination method in the laboratory (Silva et al, 2010). The range indicates the extent to which the studied variable is correlated, that is, represent the radius in which an area can be considered homogeneous in relation to the parameters studied (Lima et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

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Spatial patterns of soil attributes in a fluvent in the semiarid region, Brazil

Andrade¹,

Montenegro²,

Suzana³

et al. 2017

Afr. J. Agric. Res.

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Spatial variability studies on soil attributes are fundamental for adoption of best agricultural practices concerned with irrigated agricultural sustainability. This study aims to infer the spatial variability patterns of soil moisture, soils salinity and soil texture in an irrigated area of Pernambuco State (Brazil) under cultivation of carrot (Daucus Carota L.), during the dry period of 2012. The area is a typical system in the semiarid under small scale agricultural practices. For the study, it was adopted a 4 × 4 m regular mesh, with 49 sampling points collected at 0-0.2 m and 0.2-0.4 m layers. Data were submitted to classical statistical procedure, followed by geostatistical analysis. For soil moisture at 0.2-0.4 m layer and clay content, the degree of variability was considered low. For soil moisture at 0-0.2 m the degree of variability was moderate, while the electrical conductivity showed a high degree of variability. Occurrence of soil salinity is higher at the soil surface. Water flow occurs from the borders to the central plot, as evidenced by contour maps. Geostatistics allowed the characterization of the spatial variability patterns for the main soil attributes in an irrigated plot in the semiarid of Brazil, and it has been shown as an important tool for the prediction of soil attributes. Such results are important for issuing guidance for sustainable small scale agriculture practices in the region.

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Spatial patterns of soil attributes in a fluvent in the semiarid region, Brazil

Andrade¹,

Montenegro²,

Suzana³

et al. 2017

Afr. J. Agric. Res.

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“…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: 63%

“…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: 90%

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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“…The biometric variables of maize (HFC, NL, DA3L, PH, and WGC) presented moderate to high spatial dependence for treatment with coconut powder (CP). Silva et al (2010) emphasized that the spatial variability of soil physical attributes influences the developmental factors and production of agricultural crops. Abrantes et al (2015) reported that mulching is an essential management practice for the maintenance of a sustainable agroecosystem, as planting in bare soil can promote its degradation.…”

Section: Resultsmentioning

confidence: 99%

Spatial dependence of attributes of rainfed maize under distinct soil cover conditions

Carvalho

Montenegro

Assis

et al. 2019

Rev. bras. eng. agríc. ambient.

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Maize crop under rainfed conditions is widely grown in the Brazilian Northeast on community farms for human and animal consumption. The application of mulch could be adopted to enhance rainwater harvesting and soil moisture levels, although such practice is rarely applied in rainfed cultivation. This study aimed to evaluate the spatial variability of maize productivity, based on soil physical attributes and plant growth and yield, under a rainfed regime in the presence and absence of mulch in the Brazilian semi-arid region. The study was conducted from May to September 2016 in Pesqueira - PE (locality of the Semiarid of Pernambuco State, Northeast, Brazil), during which the development and production of maize in experimental plots were evaluated, and maize was grown using the traditional cropping system with and without mulching. Two grids with 40 points in a 4 × 10 m mesh were established, with spacing of 1 m for soil sampling and maize biometric evaluation. For statistical analysis, 30 samples were randomly selected from each plot. Maize cultivated in the presence of mulch showed higher development, with symmetrical distribution for all variables except for soil moisture and stem diameter. Sand content, soil moisture, height of the first cob, number of leaves, leaf length, plant height, and cob weight presented moderate to strong spatial scale dependence for the two cropping conditions, with higher spatial dependence consistently observed for the development parameters in the covered area.

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Variabilidade espacial de parâmetros de crescimento da mamoneira e de atributos físico-químicos em Neossolo

Cited by 7 publications

References 17 publications

Spatial patterns of soil attributes in a fluvent in the semiarid region, Brazil

Spatial patterns of soil attributes in a fluvent in the semiarid region, Brazil

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

Spatial dependence of attributes of rainfed maize under distinct soil cover conditions

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