TOMATO YIELD RESPONSE TO SALT STRESS DURING DIFFERENT GROWTH STAGES UNDER ARID ENVIRONMENTAL CONDITIONS | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 5, Volume 6, Issue 7, July 2015, Pages 863-880 PDF (477.99 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2015.42786 | ||
| Authors | ||
| A. Shalaby1; A. Saad2; A. Mokhtar1 | ||
| 1Department of Soil Chemistry and Physics, Desert Research Center, Egypt. | ||
| 2Department of Soils and Water Sciences, Faculty of Agriculture, Alexandria University, Egypt. | ||
| Abstract | ||
| Field experiment in calcareous sandy clay loam soil at Maryout Experimental Station Farm, Desert Research Center, Egypt during summer season 2007 were conducted to investigate growth parameters and fruit yield of tomato (Lycopersicon esculentum, mill., cultivator 888) response to salt stress at irrigation water levels during different growth stages under drip and gated-pipe irrigation systems in arid environmental conditions. Each irrigation system is comprised 9 irrigation treatments combined between salt stress using well water of 9.15 dSm-1 and irrigation water levels of 100, 75, and 50 % from crop evapotranspiration (ETc) subjected during development, flowering and harvesting stages as well as control treatment; the plants were irrigated by the irrigation water level of 100 % ETc during the season using agricultural drainage water of 2.80dSm-1.Under studied irrigation systems, the plant height, fresh, dry weight and fruit yield of tomato plants at the harvesting subjected to salt stress using 9.15 dSm-1 and irrigation water levels of 100, 75 and 50 % ETc during development, flowering and harvesting growth stages were significantly decreased by decrement irrigation water levels. However, the results revealed that the tomato leaf water potential values as affected by the studied salt stress at irrigation water levels of % ETc was appeared opposite trend that obtained for the other growth parameters and fruit yield. Also, the results showed that the plant height, fresh, dry weight, leaf water potential and fruit yield of tomato plants at the harvesting stage subjected to studied salt stress and irrigation water depth levels during development, flowering and harvesting growth stages under drip irrigation system, in general were higher than that obtained under gated pipe irrigation system. Under drip irrigation system, fruit yield reduction percentages relative to control treatment were 9.9, 16.0 & 22.5 % for plants subjected during development stage, 21.5, 28.8 & 41.5 % for plants subjected during flowering stage and 11.6, 16.2 & 23.2 for plants subjected during harvesting stage at irrigation water levels of 100, 75 and 50 % ETc by well water, 9.15 dSm-1, respectively. Under gated pipe irrigation system, fruit yield reduction percentages were 11.6, 13.7&16.8 % for plants subjected during development stage, 20.6, 22.2 & 29.1 % for plants subjected during flowering stage and 13.2, 14.2 & 17.7 for plants subjected during harvesting stage at irrigation water levels of 100, 75 and 50 % ETc by well water, 9.15 dSm-1, respectively. Consequently, the development growth stage of tomatoes subjected to applied irrigation water levels of 100, 75 and 50 % ETc by well water, 9.15 dSm-1, is the lowest stage affected than other growth stages while, the flowering growth stages of tomatoes is more affected to salt stress and deficit irrigation water amount than other growth stages especially at irrigation water level of 50 % ETc, under studied irrigation systems in environmental conditions. | ||
| Keywords | ||
| salt stress; Drip irrigation; gated pipe irrigation; growth stages; tomato growth parameters; tomato fruit yield | ||
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