Spatial variability in soybean seeds quality and in chemical attributes of the soil of a production field in the Brazilian Cerrado
The objective of this study was to evaluate the spatial variability in soybean seeds quality and in soil chemical attributes of a production field. Data were collected at 138 georeferenced points of a soybean production property located in Santo Antônio de Leverger - MT. Soil related variables, such...
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Published in: | Journal of seed science Vol. 40; no. 1; pp. 25 - 35 |
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Main Authors: | , , , |
Format: | Journal Article |
Language: | English |
Published: |
ABRATES - Associação Brasileira de Tecnologia de Sementes
01-03-2018
Associação Brasileira de Tecnologia de Sementes |
Subjects: | |
Online Access: | Get full text |
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Summary: | The objective of this study was to evaluate the spatial variability in soybean seeds quality and in soil chemical attributes of a production field. Data were collected at 138 georeferenced points of a soybean production property located in Santo Antônio de Leverger - MT. Soil related variables, such as phosphorus, potassium, calcium, magnesium, and organic matter (OM) contents, pH, cation exchange capacity (CEC) and base saturation (V%) were evaluated. On the other hand, yield, one thousand seed mass, size, germination, emergence in seedbed, electrical conductivity, accelerated aging and tetrazolium reaction were evaluated as seed variables. The data were submitted to descriptive and geostatistical analysis, and the fit semivariogram parameters were used to elaborate spatial distribution maps of the analyzed variables. After the analysis, it was possible to conclude that there was spatial variability in the evaluated attributes for both seeds and soil related variables, indicating that the soybean seed production area can be divided into management zones, which allows the definition of areas to be harvested or discarded within a field of seed production.
Resumo: Objetivou-se avaliar a variabilidade espacial da qualidade de sementes de soja e dos atributos químicos do solo em campo de produção. Os dados do experimento foram coletados em 138 pontos georreferenciados em propriedade produtora de sementes de soja localizada no município de Santo Antônio de Leverger - MT. Para as variáveis relacionadas ao solo, avaliou-se os teores de fósforo, potássio, cálcio, magnésio, matéria orgânica (MO), o pH, a capacidade de troca catiônica (CTC) e a saturação por bases (V%). Nas sementes, avaliou-se produtividade, massa de 1000 sementes, tamanho, germinação, emergência em canteiro, condutividade elétrica, envelhecimento acelerado e tetrazólio. Os dados foram submetidos à análise descritiva e geoestatística, e os parâmetros dos semivariogramas ajustados foram utilizados para elaboração de mapas de distribuição espacial das variáveis analisadas. Após análise, conclui-se que há variabilidade espacial nos atributos avaliados nas sementes e no solo, indicando que a área para produção de sementes de soja pode ser dividida em zonas de manejo, que permite a definição de áreas a serem colhidas e descartadas dentro de um campo de produção de sementes. |
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ISSN: | 2317-1537 2317-1545 2317-1545 |
DOI: | 10.1590/2317-1545v40n1182375 |