The Effect of Potassium and Magnesium Fertilization on the Growth and Nutritional Pattern and K-Mg Uptake Efficiency of Maize Grown in Fe Siltation Soil

Authors : M Rüşti Karaman, Ali Aksu, Tuncay Demirer, Fatih Er

Pages : 107-117

View : 40 | Download : 11

Publication Date : 1999-12-15

Article Type : Research Paper

Abstract :A pot experiment with corn (Zea mays L., cv.TTM-813) was carried out on a completely randomized design with two factors. Potassium and magnesium were applied at the rates of 0, 10, 20, 30, 40 mg K₂O.kg¹ as K2SO4 and 0, 10, 20, 30, 40 mg Mg kg¹ as MgO to the pots containing 5 kg of soil which are brought into cultivation after siltation made by Kelkit river. Phosphorus and N were applied at the rates of 40 mg P2O5.kg¹ as triple superphosphate and 75 mg N.kg¹ as urea respectively as basal fertilization. The plants were harvested 8 weeks after sowing. Potassium has significantly increased the growth of corns, regardless of applied levels, compared with control treatment. Increasing rates of magnesium has also significantly affected the growth of corn plant. 20 mg K₂O.kg and 20 mg.kg¹ Mg were sufficient to increase the dry matter yield of plants. K-use efficiency, K-uptake efficiency and K-utilization efficiency were strongly related to the K application, on the other hand, Mg-use efficiency, Mg-uptake efficiency and Mg-utilization efficiency were strongly related to the Mg application. K and Mg-utilization efficiencies suggested that K:Mg ratio was an important factor for optimal growth and that proper nutrient uptake of the plants. It was concluded that application of Mg fertilizer must accompany K fertilizer application, especially in the siltation soils poor in available magnesium. Fe, Zn, Cu and Mn uptakes of plant gave different values depending on the dry matter yield and nutrient content of corn.
Keywords : FE SİLTASYON, MISIR BİTKİSİ, POTASYUM VE MAGNEZYUM

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