Ali, S., Eid, T., Abd Elhady, A. (2015). EFFECT OF DIFFERENT SOIL MOISTURE LEVELS AND NITROGEN SOURCES ON LETTUCE YIELD (Lactuca sativa L.) UNDER SURFACE AND DRIP IRRIGATION SYSTEMS IN CLAY LOAM SOILS. Journal of Plant Production, 6(12), 1957-1974. doi: 10.21608/jpp.2015.52123
Seham M. Ali; T. A. Eid; A. M. Abd Elhady. "EFFECT OF DIFFERENT SOIL MOISTURE LEVELS AND NITROGEN SOURCES ON LETTUCE YIELD (Lactuca sativa L.) UNDER SURFACE AND DRIP IRRIGATION SYSTEMS IN CLAY LOAM SOILS". Journal of Plant Production, 6, 12, 2015, 1957-1974. doi: 10.21608/jpp.2015.52123
Ali, S., Eid, T., Abd Elhady, A. (2015). 'EFFECT OF DIFFERENT SOIL MOISTURE LEVELS AND NITROGEN SOURCES ON LETTUCE YIELD (Lactuca sativa L.) UNDER SURFACE AND DRIP IRRIGATION SYSTEMS IN CLAY LOAM SOILS', Journal of Plant Production, 6(12), pp. 1957-1974. doi: 10.21608/jpp.2015.52123
Ali, S., Eid, T., Abd Elhady, A. EFFECT OF DIFFERENT SOIL MOISTURE LEVELS AND NITROGEN SOURCES ON LETTUCE YIELD (Lactuca sativa L.) UNDER SURFACE AND DRIP IRRIGATION SYSTEMS IN CLAY LOAM SOILS. Journal of Plant Production, 2015; 6(12): 1957-1974. doi: 10.21608/jpp.2015.52123
EFFECT OF DIFFERENT SOIL MOISTURE LEVELS AND NITROGEN SOURCES ON LETTUCE YIELD (Lactuca sativa L.) UNDER SURFACE AND DRIP IRRIGATION SYSTEMS IN CLAY LOAM SOILS
2Soil, Water and Environ. Res. Inst. Agric. Res. Cent., Giza, Egypt
Abstract
A field experiment was conducted at El-Kanater Horticultural Research Station in the two seasons of 2013/14 and 2014/15 to study the effect of two soil moisture levels (25 % and 50 % of available soil moisture i.e. medium and dry) under drip and surface irrigation systems and three sources of N- fertilizers, namely urea ( 46.5% N), ammonium nitrate ( 33.5% N) and ammonium sulphate ( 20.5% N) at the rate of 50 kg N/fed., as well as their interactions on applied irrigation water, water use efficiency, growth, yield quality and chemical composition of lettuce (Lactuca sativa L.)cv. Balady .
Results indicate that surface irrigation system showed higher applied irrigation water under 25% and 50% of the available soil moisture than the drip irrigation system during 2013/14 and 2014/15 seasons. Drip irrigation system supported an increase of water use efficiency (23.84 and 22.57 kg/m3) in the first and the second seasons, respectively . Ammonium sulphate application slightly increased the water use efficiency W.U.E (23.65 and 24.16 kg/m3) in the two seasons, respectively. Results of the interaction indicate that the medium moisture (25 %) and Ammonium sulphate application under drip and surface irrigation systems increased all studied growth characters, yield and nutrient uptake of lettuce .
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