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Pesquisa Agropecuária Brasileira

versão impressa ISSN 0100-204Xversão On-line ISSN 1678-3921

Resumo

SILVA, Alisson Jadavi Pereira da; COELHO, Eugênio Ferreira; MIRANDA, Jarbas Honorio de  e  WORKMAN, Stephen Ray. Estimating water application efficiency for drip irrigation emitter patterns on banana. Pesq. agropec. bras. [online]. 2009, vol.44, n.7, pp.730-737. ISSN 0100-204X.  http://dx.doi.org/10.1590/S0100-204X2009000700013.

The objective of this work was to evaluate root and water distribution in irrigated banana (Musa sp.), in order to determine the water application efficiency for different drip irrigation emitter patterns. Three drip emitter patterns were studied: two 4-L h-1 emitters per plant (T1), four 4-L h-1 emitters per plant (T2), and five 4-L h-1 emitters per plant (T3). The emitters were placed in a lateral line. In the treatment T3, the emitters formed a continuous strip. The cultivated area used was planted with banana cultivar BRS Tropical, with a 3-m spacing between rows and a 2.5-m spacing between plants. Soil moisture and root length data were collected during the first production cycle at five radial distances and depths, in a 0.20x0.20 m vertical grid. The experiment was carried out in a sandy clay loam Xanthic Hapludox. Soil moisture data were collected every 10 min for a period of five days using TDR probes. Water application efficiency was of 83, 88 and 92% for the systems with two, four and five emitters per plant, respectively. It was verified that an increase in the number of emitters in the lateral line promoted better root distribution, higher water extraction, and less deep percolation losses.

Palavras-chave : Musa spp.; root distribution; rootzone processes; TDR; water use efficiency.

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