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Two field experiments were carried out during summer seasons of 2019 and 2020 in Horticulture farm, Faculty of Agricultural, Kafr El-Sheikh University, North of the Nile Delta, Egypt, having a clay textured soil to evaluate the effect of drainage of fish ponds on microirrigation systems performance and summer cabbage production. Study variables were; two microirrigation systems (drip system "D" and microsprinkler system "MS"), two sources for irrigation (traditional water “TW” and drainage of fish ponds “DF”) and three nitrogen doses (100% N, 70% N and 40% N). For traditional water “TW” (100% N) only was applied. The results referred to that, “DF” increased the reduction in emitter flow rate at end of growing season comparing with “TW”. The lowest reduction was achieved by (TW+ 100% N) as 6.1 and 3.0 % for “D” and “MS” systems respectively. The highest uniformity coefficient (CU) at end of growing season achieved by (TW+ 100% N) as 87 and 84 % for “D” and “MS” systems respectively. “D” system achieved the highest head yield while “MS” system achieved the highest head diameter. The highest head yield was achieved by (DF + 100% N) as 110 and 87.4 ton/fed. for “D” and “MS” respectively. The highest values of water productivity were obtained by (DF + 100% N) as 49.7 and 44.7 kg/m for “D” and “MS” respectively. The highest values of nitrogen productivity were obtained by (DF + 40% N) as 1170.8 and 1045.8 kgyeild/kgN for “D” and “MS” respectively.

journal of soil sciences and agricultural engineering /journal of soil sciences and agricultural engineering

Impact of Irrigation Water Source on Microirrigation Systems Performance and Productivity of Leaf Vegetable Crops تأثیر مصدر ماء الری على آداء نظم الری الدقیق وانتاجیة محاصیل الخضر الورقیة