Water requirement of drip irrigated tomatoes grown in greenhouse in tropical environment |
| |
| Institution: | 1. Agricultural Systems and Engineering, Asian Institute of Technology, Bangkok, Thailand;2. Water Engineering and Management, Asian Institute of Technology, Bangkok, Thailand;3. Horticultural and Agricultural Engineering Institute, University of Hannover, Hannover, Germany;1. Biosystem Engineering, Faculty of Agriculture, University of Erciyes, Turkey;2. Programme of Horticulture, Vocational School of SÇ, University of Erciyes, Turkey;3. Dept. of Plant Protection, Faculty of Agriculture, University of Erciyes, Turkey;1. Dept. of Computer Sciences and Automatic Control, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain;2. Department of Informatics, University of Almería, ceiA3, CIESOL, 04120 Almería, Spain;3. Department of System Engineering and Automation, School of Engineering, University of Seville, 41092 Seville, Spain;4. Experimental Station of the Cajamar Foundation, “Las Palmerillas”, El Ejido, Almería, Spain;1. Plant and Environmental Sciences, MSC 3Q, P.O. Box 30003, Las Cruces, NM 88003-8003, USA;2. Economics and International Business Department, New Mexico State University, MSC 3CQ, P.O. Box 30001, Las Cruces, NM 88003-8001, USA;1. ÇanakkaleOnsekiz Mart University, Lapseki Vocational College, Lapseki, Çanakkale 17800 Turkey;2. Ataturk Soil Water and Agricultural Meteorology Research Institut, Kirklareli, Turkey;3. Namik Kemal University, Faculty of Agriculture, Department of Horticulture, Tekirdag, Turkey;1. Dept of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia, Italy;2. Horticultural Sciences Department, University of Florida, 1301 Fifield Hall, Gainesville, FL 32611, USA |
| |
| Abstract: | Four different levels of drip fertigated irrigation equivalent to 100, 75, 50 and 25% of crop evapotranspiration (ETc), based on Penman–Monteith (PM) method, were tested for their effect on crop growth, crop yield, and water productivity. Tomato (Lycopersicon esculentum, Troy 489 variety) plants were grown in a poly-net greenhouse. Results were compared with the open cultivation system as a control. Two modes of irrigation application namely continuous and intermittent were used. The distribution uniformity, emitter flow rate and pressure head were used to evaluate the performance of drip irrigation system with emitters of 2, 4, 6, and 8 l/h discharge. The results revealed that the optimum water requirement for the Troy 489 variety of tomato is around 75% of the ETc. Based on this, the actual irrigation water for tomato crop in tropical greenhouse could be recommended between 4.1 and 5.6 mm day?1 or equivalent to 0.3–0.4 l plant?1 day?1. Statistically, the effect of depth of water application on the crop growth, yield and irrigation water productivity was significant, while the irrigation mode did not show any effect on the crop performance. Drip irrigation at 75% of ETc provided the maximum crop yields and irrigation water productivity. Based on the observed climatic data inside the greenhouse, the calculated ETc matched the 75–80% of the ETc computed with the climatic parameters observed in the open environment. The distribution uniformity dropped from 93.4 to 90.6%. The emitter flow rate was also dropped by about 5–10% over the experimental period. This is due to clogging caused by minerals of fertilizer and algae in the emitters. It was recommended that the cleaning of irrigation equipments (pipe and emitter) should be done at least once during the entire cultivation period. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
