Retenção de água pelo dossel do feijoeiro irrigado por aspersão
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Data
2010-03
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Resumo
Knowing the amount of water retained by common bean leaves is important for
irrigation and chemigation purposes. This study was carried out in order to estimate the
volume of water retained in common bean leaves per unit area (ha), under a center pivot
irrigation depth. Pérola common bean cultivar was sown in the summer, autumn and winter
crop season at 0.45 m between rows and 15 plants per meter. 10 plants were measured at five
phenological stages. The amount of water retained in the bean leaves was obtained by the
difference between total plant weight (measured after irrigation) and dry plant weight
(measured after drying with air). The total plant leaf area was evaluated for each sampling
period using a leaf area meter LICOR, model 3100. Data were submitted to regression
analyses. Results indicated that the water retained in bean leaves (V, L ha -1 ) can be estimated
using a leaf area index (V=648.12*LAI). The application of average water depth of 8.1 mm
allowed 2.5% of average water losses by foliar interception.
Descrição
Palavras-chave
Phaseolus vulgaris, Manejo da irrigação, Área foliar, Pivô central, Phaseolus vulgaris, Central pivot, Leaf area, Irrigation management
Citação
ALVES JÚNIOR, José; SILVEIRA, Pedro Marques da; STONE, Luis Fernando; CUNHA, Paulo César Ribeiro. Retenção de água pelo dossel do feijoeiro irrigado por aspersão. Irriga, Botucatu, v. 15, n. 1, p. 90-97, jan./mar. 2010.