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Pesquisa Agropecuária Brasileira

Print version ISSN 0100-204XOn-line version ISSN 1678-3921

Abstract

OLDONI, Henrique  and  BASSOI, Luís Henrique. Delineation of irrigation management zones in a Quartzipsamment of the Brazilian semiarid region. Pesq. agropec. bras. [online]. 2016, vol.51, n.9, pp.1283-1294. ISSN 0100-204X.  https://doi.org/10.1590/s0100-204x2016000900028.

The objective of this work was to delineate irrigation management zones using geostatistics and multivariate analysis in different combinations of physical and hydraulic soil properties, as well as to determine the optimal number of management zones in order to avoid overlaping. A field experiment was carried out in a Quartzipsamment, for two years, in an irrigated orchard of table grape, in the Senador Nilo Coelho Irrigation Scheme, in the municipality of Petrolina, in the state of Pernanbuco, Brazil. Soil samples were collected for the determination of soil physico-hydraulic properties. A portable meter was used to measure soil apparent electrical conductivity. Spatial distribution maps were generated using ordinary kriging. Management zones for five different combinations of soil properties were defined using the fuzzy c-means clustering algorithm, and two indexes were applied to determine the optimal number of management zones. Two combinations of soil properties can be used in the management zone planning in order to monitor soil moisture.

Keywords : fuzzy c-means; geostatistics; irrigation planning; precision agriculture; soil apparent electrical conductivity; spatial variability.

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