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
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. EKB Journal Management System, 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". EKB Journal Management System, 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', EKB Journal Management System, 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. EKB Journal Management System, 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

Journal of Plant Production
Article 3, Volume 6, Issue 12, December 2015, Page 1957-1974  XML PDF (606.75 K)
Document Type: Original Article
DOI: 10.21608/jpp.2015.52123
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Authors
Seham M. Ali1; T. A. Eid2; A. M. Abd Elhady2
1Hort. Res. Inst., Agric. Res. Cent., Giza, Egypt
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 .
Keywords
lettuce; soil moisture levels; nitrogen sources; Growth; yield
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