Comparison of nitrogen and irrigation strategies in tomato using CROPGRO model. A case study from Southern Italy |
| |
Authors: | Michele Rinaldi Domenico Ventrella Caterina Gagliano |
| |
Institution: | 1. C.R.A., Istituto Sperimentale Agronomico, Via Celso Ulpiani 5, 70125 Bari, Italy;2. C.R.A., Istituto Sperimentale per l’Assestamento Forestale, Piazza Nicolini 6, 38050 Loc. Villazzano, Trento, Italy |
| |
Abstract: | The CROPGRO simulation model was calibrated for processing tomato in Southern Italy with a 2002 data set and validated with three independent data sets with acceptable results. Subsequently this model was combined with 53 years of local historical weather data and it was used as a research tool to evaluate the benefits, risks and costs of 23 different interactive irrigation and/or N-management scenarios. Irrigation water was applied (i) on reported dates with 3 and 5 days intervals and application rates of 15 and 25 mm or (ii) with automatic irrigation initiated at residual soil moisture levels in the upper 30 cm of the soil profile of 25, 50, or 75%. Three amount levels of N application (100, 200 and 300 kg ha−1 as ammonium nitrate) were considered. A simple economic analysis, including tomato marketable yield and price, irrigation and nitrogen cost and other fixed production costs, was used to estimate expected net return for each management scenario. |
| |
Keywords: | Lycopersicon esculentum Mill DSSAT software CROPGRO model Model calibration Model validation Water use efficiency Nitrogen use efficiency Environmental risk Economic return |
本文献已被 ScienceDirect 等数据库收录! |
|