Partial rootzone drying is a feasible option for irrigating processing tomatoes |
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| Institution: | 1. Institute of Natural Resources (INR 433), Massey University, Palmerston North, New Zealand;2. HortResearch, Private Bag 11 030, Palmerston North, New Zealand;1. Department of Plant Physiology, University of Agriculture in Krakow, Pod?u?na 3, Kraków 30-239, Poland;2. The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Kraków 30-239, Poland;1. School of Mechanical Engineering, Shiraz University, Shiraz, Iran;2. School of Business, Society and Engineering, Department of Civil Engineering and Energy System, Mälardalen University, 721 23, Västerås, Sweden;1. Institute for Laser Science, The University of Electro-Communications, Tokyo 182-8585, Japan;2. National Institute for Fusion Science, Gifu 509-5292, Japan;3. Department of Fusion Science, SOKENDAI, Gifu 509-5292, Japan;4. National Astronomical Observatory of Japan, Tokyo 181-8588, Japan;5. Department of Astronomical Science, SOKENDAI, Tokyo 181-8588, Japan;1. Center for Agricultural Water Research in China, China Agricultural University, Beijing, China;2. Wuwei Experimental Station for Efficient Water Use in Agriculture, Ministry of Agriculture and Rural Affairs, Wuwei, China;3. UMR 1287 EGFV, Bordeaux Sciences Agro, INRAE, Université de Bordeaux, ISVV, 33140 Villenave d’Ornon, France;4. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang, Henan, China;5. INRAE, UR 1115 Plantes et Systèmes de Culture Horticoles, Avignon, France;1. Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China;2. Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem, Sun Yat-Sen), Nanjing 210014, China;3. Key Laboratory of Non-timber Forest Germplasm Enhancement & Utilization of State Forestry and Grassland Administration, Research Institute of Non-timber Forestry, Chinese Academy of Forestry, Zhengzhou 450003, China;4. Qingdao Landscape and Forestry Technical School, Qingdao 266071, China;5. Hou Shenling Forest Farm, Shanxi Province Taiyue Mountain State-Owned Forest Administration, Changzhi 046500, China;6. School of Information, Renmin University of China, Beijing 100872, China |
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| Abstract: | World water supplies are limited and water-saving irrigation practices, such as partial rootzone drying (PRD), should be explored. We studied the effects of PRD, applied through furrow and drip irrigation, on plant water relations, yield, and the fruit quality of processing tomato (Lycopersicon esculentum Mill. cv. ‘Petopride’). There were four treatments. The first two were: full irrigation by hand on both sides of the root system which mimicked furrow irrigation (FuI), and half of irrigation water in FuI given alternately only to one side of the root system with each irrigation (PRDFuI). The next two treatments were: full drip irrigation (DrI) to both sides of the root system, and half of irrigation water in DrI given alternately only to one side of the root system with each irrigation (PRDDrI). Leaf water potential was the same among the treatments except for the PRDFuI plants, which had the lowest midday values only in one sampling out of four. Photosynthetic rate was the same among the treatments except for the drip-irrigated plants having the lowest value in one sampling out of four. Number of fruit, mean fruit mass of fruit, total fresh and dry mass of fruit, and harvest index were the same among treatments, but PRD plants had increased irrigation use efficiency compared to fully irrigated plants. There was no incidence of blossom-end rot in any of the treatments. PRDDrI fruit had redder colour and higher total soluble solids concentration. Advancement in fruit maturity and enhancement of quality could be achieved without detrimental effect on fresh and dry mass of fruit by application of PRD. Independent of the irrigation method, PRD treatments improved irrigation use efficiency by ca. 70%. PRD has the potential for use in processing tomato especially in environments with limited water. |
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