ISHS Acta Horticulturae 278: Symposium on Scheduling of Irrigation for Vegetable Crops under Field Condition
NEW METHODS OF DETERMINING THE WATER REQUIREMENTS OF VEGETABLES |
| Authors: | H.D. Hartmann, E. Pfülb, K.H. Zengerle |
| Abstract:
The water consumption of different kinds of vegetables were examined in weighable lysimeters. After setting these data into relation to the potential evapotranspiration (ETP) calculated via the modified Penman equation, we obtained plant species and plant developmental specific factors. In order to prove these calculated "Kc-values" for irrigation scheduling under practical conditions, we used the point-source-sprinkler-method in various field trials. In a test plot planted with leek several rain gauges managed exact measurement of the applicated water in dependance of the distance to the sprinkler. We compared the obtained yields and figured out which amount of water was actually necessary to get a desired yield and quality. Through the statistical clearing it was possible to determine the optimum range of irrigation conduction. According to the results we select smaller "Kc-values" for optimal irrigation of leek. | |
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