Variabilidade espacial dos componentes produtivos da cultura da soja

Rodrigues, Luiz Claudio; Roque, Cassiano Garcia; Cunha, Fernando França da; Assunção, Paulo Cezar Gomes de; Souza, Gabriela Vitória; Baio, Fabio Henrique Rojo; Oliveira, Job Teixeira de

doi:10.30612/agrarian.v16i56.16682

Agrarian

2023

DOI: 10.30612/agrarian.v16i56.16682

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Variabilidade espacial dos componentes produtivos da cultura da soja

Luiz Claudio Rodrigues,

Cassiano Garcia Roque,

Fernando França da Cunha

et al.

Abstract: Objetivou-se interpretar a estrutura e a magnitude da distribuição espacial dos atributos da planta em lavoura de soja. Os atributos avaliados foram amostrados numa área de 22 ha, onde a determinação dos pontos de coleta de amostras se realizou em uma malha de 99 pontos. A análise dos dados possibilitou constatar que os componentes de produção e produtividade da soja (produtividade de grãos, massa de 100 grãos, número de vagens por planta, número de grãos por planta, altura da planta, número de internódios, nú… Show more

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Correlations between soil properties and spectral index (healthy vegetation) in soybean crops

Roque,

Teixeira de Oliveira,

Baio

et al. 2023

Agron. Colomb.

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Precision agricultural technologies, such as the use of spatial variability of soil properties, have been extensively studied for soybean cultivation. The objective of this study was to analyze the spatial variability of soil properties cultivated with soybean and to correlate the healthy vegetation (HV) spectral index with the bands B8A (classifying vegetation - 865 nm), B11 (measuring the moisture content of soil and vegetation - 1610 nm), B02 blue (useful for soil and vegetation discrimination - 490 nm). A sampling grid was installed for data collection in an area of 2,126.02 ha, with 270 regular points and 98 random points, totaling 368 points. For the soil, the contents of P (resin), K+, Ca2+, Mg2+, H+, Al3+, pH values, sum of bases (SB), cation exchange capacity (CEC), and base saturation were determined at a depth of 0.0 to 0.20 m. Most of the soil properties had exponential and spherical dependence. Clay percentages and Ca, Mg, and P contents had positive spatial correlation with the healthy vegetation spectral index (HV) while no spatial correlation was observed for pH, B, K, silt, sand, S, H+Al, Al, SB, and CEC. The sensor image used in this study in relation to HV showed good application for observing the spatial variability of the soil properties and soybean yield.

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Correlations between soil properties and spectral index (healthy vegetation) in soybean crops

Roque,

Teixeira de Oliveira,

Baio

et al. 2023

Agron. Colomb.

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Spatial depeSpatial dependence of soybean cultivation, in a low-carbon production system, integrated with eucalyptus forestndence of soybean from eucalyptus forest

Ratke,

González Aguilera,

Zuffo

et al. 2024

Ciênc. Florest.

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In a climate change scenario, a producer who decides to invest in a Crop-Forest integration system, instead of investing in conventional production, benefits. The objective the present work, which is a low carbon emission agriculture model, aimed to evaluate the effect of shading and the spatial dependence of soybean crop indices in integration with eucalyptus forest. The design adopted was that of randomized blocks with six replications and treatments composed of different horizontal distances about eucalyptus (30, 34, 38, 42 and 46 m), in two distinct areas, one with the presence of eucalyptus forest in the north and west phase and another one without the presence of eucalyptus in the northern part of the soybean cultivation area. Evaluated the photosynthetically active photons at four different times, the plant stand, plant height, and the vegetation index after 30 and 60 days of germination and finally the mass of a thousand grains and productivity. As a result, all attributes showed spatial dependence, except soybean productivity. As final considerations, the spacing of 34 m between the eucalyptus trees promote less shading. The highest average grain production in the area was found in the presence of eucalyptus on the west and north sides of the cultivation area.

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Variabilidade espacial dos componentes produtivos da cultura da soja

Cited by 2 publications

References 16 publications

Correlations between soil properties and spectral index (healthy vegetation) in soybean crops

Correlations between soil properties and spectral index (healthy vegetation) in soybean crops

Spatial depeSpatial dependence of soybean cultivation, in a low-carbon production system, integrated with eucalyptus forestndence of soybean from eucalyptus forest

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