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Spatial variability of chemical and physical attributes of dystrophic Red-Yellow Latosol in no tillage ; Variabilidade espacial de atributos físico-químicos de um Latossolo Vermelho-Amarelo distrófico em sistema plantio direto

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  • معلومة اضافية
    • بيانات النشر:
      UEL
    • الموضوع:
      2014
    • Collection:
      Universidade Estadual de Londrina: Portal de Periódicos Científicos da UEL
    • نبذة مختصرة :
      Knowledge of spatial variability in chemical and physical properties of the soil is very important, especially for precision agriculture. Geostatistics is seeking to improve techniques that can enable the correct and responsible use of soil. So during the agricultural year 2011/2012 in an area of direct planting the corn crop in the municipality of Gurupi (TO), in the Brazilian Cerrado, aimed to analyze the spatial variability of chemical and physical properties in a Typic Dystrophic tillage. Was installed sampling grid for the collection of soil, with 100 sampling points in an area of 1755m2. The contents of available phosphorus, organic matter, pH (H2O), concentrations of K +, Ca2+, Mg2+, the sum of values and base saturation (BS, V) at depths of 0-0.20 m, and resistance to penetration (RP) at depths 0-0.05 m, 0.05-0.10 m, 0.10-0.20 m and 0.20-0.40 m and bulk density (Ds). We conducted a descriptive analysis classic, with the aid of statistical software ASSISTAT, and then were modeled semivariograms for all attributes, resulting in their cross-validation and kriging maps. The chemical and physical properties of soil, except the base saturation (V), spatial dependence. Probably the discontinuity of the spatial dependence of Vvalue, is due to fertility management over the years. ; O conhecimento da variabilidade espacial dos atributos químicos e físicos no solo é muito importante, principalmente, para a agricultura de precisão. A geoestatística vem em busca de aprimorar técnicas que possam viabilizar o uso correto e responsável do solo. Assim, durante o ano agrícola 2011/2012, em área de plantio de direto com a cultura do milho, no município de Gurupi (TO), no Cerrado brasileiro, objetivou-se analisar a variabilidade espacial de atributos físico-químicos de um Latossolo Vermelho-Amarelo distrófico sob plantio direto. Foi instalada a malha de amostragem para a coleta de dados do solo, com 100 pontos amostrais, numa área de 1755 m2. Foram determinados os teores de P disponível, matéria orgânica, valor de pH (H2O), ...
    • File Description:
      application/pdf
    • Relation:
      https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/13148/pdf_223; https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/13148
    • الرقم المعرف:
      10.5433/1679-0359.2014v35n1p193
    • الدخول الالكتروني :
      https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/13148
      https://doi.org/10.5433/1679-0359.2014v35n1p193
    • الرقم المعرف:
      edsbas.5DBEF341