Spatial variability of calcium, magnesium, phosphorus, potassium in soil and yield of black pepper [Variabilidade espacial de cálcio, magnésio, fósforo, potássio no solo e produtividade da pimenta-do-reino]
Santos E.O.J.,Graduando do Curso de Agronomia |
Gontijo I.,CUNES UFES |
Nicole L.R.,Graduando do Curso de Agronomia
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2012
The black pepper (Piper nigrum L.) has a social importance and it is mainly cultivated by small farmers, however the relationship between the spatial variability of nutrients in soil and yield of black pepper is little known. Thus, the purpose of this study was to analyse the spatial variability of Ca, Mg, K, P in soil and black pepper yield, cultivated in a distrophic Red-Yellow Latosol. The study was carried out in a black pepper plantation, in São Mateus, in the State of Espírito Santo, Brazil. A 3 × 1,8 m spacing in a mesh of 100 × 120 m (total area 12.000 m2), with 126 sampling points was used. Soil samples at depth of 0-0.2 m were collected at each point of the grid, in order to evaluate the soil chemical attributes. The variables presented a moderate and strong spatial dependence structure allowing their mapping by geostatistics techniques. Kriging maps were shown to be important tools for the understanding of spatial variability of soil nutrients, and it may be essential for decision making in the black pepper crop.
Variability and spatial correlation among micronutients and organic matter and yield of black pepper [Variabilidade e correlação espacial de micronutrientes e matéria orgânica do solo com a produtividade da pimenta-do-reino]
Gontijo I.,Federal University of Espirito Santo |
Nicole L.R.,Graduando do Curso de Agronomia |
Partelli F.L.,Federal University of Espirito Santo |
Bonomo R.,Federal University of Espirito Santo |
Santos E.O.J.,Graduando do Curso de Agronomia
Revista Brasileira de Ciencia do Solo | Year: 2012
Studies on the spatial variation of soil properties associated with the response of crop yields may contribute to a rational application of inputs, enabling economic and environmental gains. The purpose of this work was to evaluate the variability and spatial correlations among soil Fe, Cu, Zn, Mn, and organic matter contents and yield of black pepper grown on a Yellow- Red Latosol. The study was carried out on a black pepper plantation under microsprinkler irrigation, in São Mateus, State of Espirito Santo, Brazil. The experimental area was 100 x 120 m (12.000 m2). Soil was collected from under the tree canopies in the 0-0.20 m layer, in a grid with minimum distances of 5 m, totaling 126 soil samples. The black pepper production was estimated by harvesting the three plants nearest to each sample point. All measurable semivariogram properties were satisfactorily described by spherical models with a moderate and strong spatial structure. There was a negative spatial correlation between soil Fe content and yield black pepper and positive spatial correlation among Zn, Mn and organic matter contents and black pepper yield.