Extração de água pelas raízes da bananeira sob duas lâminas de irrigação e duas densidades de plantas.

Abstract

The work had as objective to evaluate the profiles of water distribution and extraction in the banana root system, cv. Caipira, for two irrigation depths and two plant densities. The crop was settled in single rows, 3.0 m x 2.7 m spacing, irrigated by microsprinklers, following a random block design with four treatments and three replications. The treatments were:L1f1 – irrigation depth of 100% ETc with one family of plants; L1 2f – irrigation depth of 100% ETc with two families of plants; L2 1f - irrigation depth of 80% ETc with one family of plants; L2 2f – irrigation depth of 80% ETc with two families of plants. The soil water content was monitored by using a TDR equipment, with probes installed in a plan of soil profile limited by the plant and the emitter, at 0.5 m-intervals of distance from the plant and at 0.25 m-intervals of depth until 1.0 m. The soil became drier for treatments conducted with two families, mainly, considering the shallower layers. 80% of water extraction took place up to depth 0f 0.75 m.