THE ROLE OF POTASSIUM IN FERTILIZER AND WATER EFFICIENCIES ON GROWTH AND YIELD OF CORN

	THE ROLE OF POTASSIUM IN FERTILIZER AND WATER EFFICIENCIES ON GROWTH AND YIELD OF CORN
Kufa Journal for Agricultural Science
Article 1, Volume 5, Issue 2, 2013, Pages 223-241
Abstract
A field experiment was conducted in silty clay loam texture soil. To evaluate the effect of K Soil application and foliar feeding on growth and grain yield of maize , cv. Bohooth 106. Four levels of potassium 0 , 75 , 100 and 125 Kg.ha-1 were added to soil and the concentration 1000 mg K.L-1 was used as foliar Potassium sulfate (41% K) was used as foliar potassium . Fixed levels of N and P were used for all treatments (160 Kg N.ha-1 and 60 Kg P.ha-1) Urea (46% N) and Triplesuperphosphate (20% P) were used as sources for N and P respectively. Sprinkler irrigation system was used in this study. Results showed that, K-application to the soil and foliar under the sprinkler irrigation and their interaction were significantly affected the plant height , Length of the ears per plant , the number of the rows per cope , the number of grains per cope and the grain yield (Ton.ha-1). The interaction treatment of (125 Kg K.ha-1) to the soil + the foliar feeding with the concentration (1000 mg K.L-1 triple) gave the highest data for the above mentioned characteristics , giving 189.60 cm , 225.3 cm , 1.16 , 17.90 , 44.47 and 13.293 ton.ha-1 respectively. Results showed also , that the same treatment gave the highest data for productivity use efficiency , fertilizer use efficiency and water use efficiency . They were 215.78% , 5.6% and 20.5% for the above mentional characteristics . Therefore, it may be recommended to apply potassium to the soil and foliar feeding to raise the adaptation of plant efficiency against unsuitable drought conditions.

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