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Using TDR to Estimate Water Application Efficiency for Drip Irrigation Emitter Patterns on Banana

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1009396.(doi:10.13031/2013.29872)
Authors:   Alisson J. P da Silva, Eugênio F Coelho, Jarbas H de Miranda
Keywords:   Musa spp., water use efficiency; rootzone process; TDR.

The objective of the present work was to evaluate root and water distributions under banana (Musa sp.) crop conditions, in order to determine the water application efficiency for different drip irrigation systems. Three drip systems were studied: T1 two 4,0 L h-1 emitters per plant in a lateral line; T2 four 4,0 L h-1 emitters per plant in a lateral line; and T3 five 4,0 L h-1 emitters per plant in a continuous strip with one lateral line. A cultivated area was used, planted with banana cultivar BRS Tropical, spaced 3.0 m between rows and 2.5 m between plants. Soil moisture and root length data were collected during the first production cycle. The experiment was carried out in a sandy clay loam Typic Hapludox. Soil moisture data were collected every 10 minutes for a period of 5 days with the TDR probes. It was verified that an increase of number of emitters in lateral lines promoted a better root distribution, better water extraction, and less deep percolation. Water application efficiencies were 83%, 88% and 92% by the systems with two, four and five emitters per plant, respectively.

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