Effect of Nitrogen Fertilization and Growth  Stage  in Growth Charcters  and Forage Yield of Corn (Zea mays L.)

	Effect of Nitrogen Fertilization and Growth Stage in Growth Charcters and Forage Yield of Corn (Zea mays L.)
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 13, Issue 4, 2013, Pages 156-163
Abstract
A Field experiment was Carried out in Autmun Season of 2012 at two locations first in AL- Hemidat / Thaljah village 20 km West of Mosul city and second at Bashiqa / Tobzawh village 25 km East of Mosul city to study effect of four fertilization levels of no Fertilization Nitrogen, Fertilization with 450kg N/ha at sowin), Fertilization with 225kgN/ha at sowing and 225kgN/ha after 20 days of emergency and Fertiliztion with 150kgN/ha at sowing and 150 kg N/ha after 20 dyas of emergency and 150 kmN/ha 30 day after emergency with clipping at three grwoth stages (25,50and75 % of Tassling) on growth and forage yield of corn variety Bohoth 106 The Experiment was Split plot in Randomized Compelt Blok (RCBD) with three replications. Most of studied Characters at both Lotaions were significantly affcated by Nitrogen Fertilization treatment with some excaptions at both Locations ,The highest dry forage weight was achevied at Tobzawh(8.4taon/ha) and Thaljah(8.59 taon/ha with , Fertilization treatment (4). Also ,most studied characters affected by growth dry forage weight was achevied at Tobzawh(8.97tons/ha) and(8.2 tons/ha) at 75% Tassling growth stage. The interaction between nitrogen Fertilization treatmet and growth stages signifticantly affected of studied characters at both Locations except the % of leaves and % of protein cotent at Thaljah Location and leaves /plant at both Locations
Keywords
nitrogen; forage; Maize

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