Response of Corn (Zea mays L .) to Nitrogen Fertilizations
ANBAR JOURNAL OF AGRICULTURAL SCIENCES,
2010, Volume 8, Issue 3, Pages 74-79
AbstractAfeild experiment has been carried out Autmn -2008 in Al-Karma region (60 Km East of Al-Anbar Province) , in a silt clay loam soil .The purpose of study is to determine the effect of different levels from Nitrogen on some growth and yield parameters for the species Zea mays L. Var. IPA 5012 .
Four levels of Nitrogen were used .They were (200,250 ,300 and 350) Km N.ha-1 ,which namely; N1,N2,N3 and N4 respectively .The amount of nitrogen was divided to three equal parts .Two parts of the nitrogen in each level were added at vegetation stage ,while the other theird added at flowering stage.
Results indicated the N4 level shows a significant increament in plant high ,leaf area ,indicator leaf area ,100 seeds weight and grain yield per plant comparing with all levels. Also the N4 level gave a significant increasing in total dry weight comparing with N1 and N2 only .While ear number and length is not influenced by increasing Nitrogen levels . The N3 level gave no a significant increasing in leaf area ,indicator of leaf area ,100 seeds weight and grain yield per plant comparing with N2 level.But increasing Nitrogen level from N1 to N3 significantly increased all parameters above
It was concluded increasing adequate fertilizer addition caused increasing indicator growth and grain yield .This resulted in a better use of available resources of water and land.
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