|Author:||Zegbe, J. A. ; Behboudian, M. H. ; Clothier, B. E.|
|Book Group Author:||NA|
Water resources are limited worldwide and there is a need to develop water-saving irrigation practices. Partial rootzone drying (PRD) was applied to processing tomato cv. Petopride plants with the alternate sides of the root system (RS) being exposed to various extents of soil dryness. The treatments included daily full irrigation (FI) in both sides of RS (control) and irrigating on only one side of the RS for 2 (PRD2), 4 (PRD4) and 6 (PRD6) consecutive days before irrigation was shifted over to the dry side of the RS for the same periods. Leaf water potential, photosynthetic rate, total fresh mass of fruit and total dry mass of fruits significantly decreased in PRD treatments relative to FI. Irrigation water use efficiency was improved in the PRD treatments. A lower percentage of dry mass was partitioned into the PRD fruit, which had lower fruit water content and higher total soluble solids concentration than the FI fruit. Fruit skin colour was the same for all the treatments. Blossom-end rot incidence was higher in PRD fruit than the FI fruit although their calcium concentration was the same. PRD saved irrigation water by 50%, although the total dry mass of fruit was reduced by 23%. The considerable saving of water could make PRD feasible in areas where water is scarce and expensive.
|Pages:||252 - 258|
|Journal:||European Journal of Horticultural Science|
calcium, chemical composition, crop quality, crop yield, drymatter, drying, fruits, irrigation, leaf water potential, leaves,photosynthesis, plant water relations, roots, tomatoes, water useefficiency, Lycopersicon esculentum, Lycopersicon, Solanaceae,Solanales, dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes,carbon assimilation, carbon dioxide fixation, watering, HorticulturalCrops (FF003) (New March 2000), Plant Physiology and Biochemistry(FF060), Plant Water Relations (FF062), Plant Production (FF100), SoilWater Management (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management], Crop Produce (QQ050), Food Compositionand Quality (QQ500)