ANBAR JOURNAL OF AGRICULTURAL SCIENCES

Abstract

A field experiment was conducted at Collage of Agriculture – Baghdad University in silty clay loam soil classified as Typic Torrifluvent to investigate the effect of differend levels of nitrogen added to soil and foliar application of nitrogen and potassium alone and together on yield and growth of corn plants. A factorial experiment (RCBD) design were used including four levels of nitrogen (0,100,200,300) Kg N.ha-1 added to soil and foliar application of nitrogen and potassium at level 5000 mg N.l-1 and 4000 mg K.l-1 . Also 75 Kg P.ha-1 and 200 Kg K.ha-1 was added to all treatments . At end of experiment dry matter weight , grains yield , weight of 500 grains and number of grains in spike were accounted .
Result showed : Significant increase in dry matter weight , grains yield and weight of 500 grains as levels of nitrogen added to soil increase . The increases were 34.95 % , 87.35 % and 100.51 % for dry weight , 68.88 % , 122.43 % and 130.66 % for grains yield and 19.24 % , 27.21 % 36.69 % for weight of 500 grains to levels N1 , N2 and N3 as compered with N0 respectively . Number of grains was increased till N2 . All the foliar application treatments showed significant increases in plant parameters the increases were as follow N+K > N > K .
The interaction of ( N3 + NK foliar application ) gave the highest values of all studied parameters than other treatments . The increases were 140.58 % , 164.24 % , 47.57 % and 79.33 % as compared with control for the parameters respectively .