ISHS Acta Horticulturae 335: International Symposium on Irrigation of Horticultural Crops
EVAPOTRANSPIRATION AND CROP COEFFICIENTS IN BANANA |
| Authors: | J.L. SANTANA, C.L. SUAREZ, E. FERERES |
| Abstract:
In order to establish guidelines for crop water management using various climatic parameters, banana evapotranspiration was measured at the Government Research Station on the island of Tenerife (Canary Islands), with a field lysimeter set up as follows: two 60 m3 tanks, with ten plants per tank, at 2x2 m. planting distance; drip irrigation was applied daily, using two ET/E0 ratios of 1.1 and 1.4, E0 being the evaporation of a class A tank. The volumetric balance of the lysimeter is expressed in the equation ET=P+I+D+ΔW, where ET is the crop evapotranspiration, P is the precipitation, I is the irrigation, D is drainage water, and ΔW are the changes in content of the soil water as measured by neutron probe. Using data recorded between 1988 and 1990, a fifth-degree polynomial regression was adjusted for averages of 10 and 30 days, obtaining ET values ranging from 2.10 to 4.56; low temperatures during January and February had a negative effect. Three crop coefficient curves were calculated by ET/E0 ratios versus shaded area, where ETo was E0, Penman-Monteith, and E0xKp. | |
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