ISHS Acta Horticulturae 278: Symposium on Scheduling of Irrigation for Vegetable Crops under Field Condition
IRRIGATION TIMING BY CLIMATE: PLOT AND DISTRICT APPLICATION FOR POTATO |
| Authors: | P. Rossi Pisa, F. Bigaran |
| Abstract:
A comparative scheduling trial for tomato using plot and lysimeter data from a three-year irrigation experiment based on evaporation criteria is reported. Water consumption was employed to determine a new scheduling criterion for district-wide irrigation. The ratio of total evapotranspiration (ET) to the mean vapor pressure deficit (VPD) was used to predict maximum expected yield range in given conditions, i.e. year, site, etc. Meteorological fluctuations appear to have little effect on this ratio so long as rainfall at initial crop cycle is minimum. Irrigation can be scheduled throughout the growing season by means of the crop coefficient, which is derived from the experimental data and adjusted to the expected ET/VPD ratio in a given year. | |
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