Management of Potassium fertilizer application integrated with different levels of Urea in some different phisico- chemical soils wheat
2010
Ramezanpour, Mahmoudreza | Ghasemi, Omid | Jafarzadeh, Hossien | Hassanpour, Faramarz | Sadeghi, Sadegh
Potassium increase efficiency of Nitrogen in plant, also due to the effect of potassium in the different soils with physo chemical properties that have different responses on the yield of crops. The effects of Potassium in different parameters including: the percentage of clay, potassium levels and different ratios of nitrogen consumption in soil. To evaluate the management of K fertilizers when consumption of different amounts of urea in the different soils with physo chemical properties under wheat cultivating , field experiments were conducted in different Wheat farms of Mazandaran in randomized complete block design in a factorial combination experiment and three replications in two years (2004-2006. Treatments were included three levels of urea (100,200 and 300 kg / ha) and four levels of potassium choloror- zero (control fertilizer), 100, 200 and 300 kg /ha. This experiment, was carried out in nine different area with different rates of clay (less than 20%, 20-30% and more than 30%) and the different amounts of available potassium (less than 100 mg/kg, 250-100 mg/kg and more than 250 mg/kg). The result of this experiment showed that with increasing of potassium choloride consumption together with urea in farms with low and even high available potassium in top dressing stage increased yield of grain, grain weight, harvest index and other components of yield. This increase is due to supplying of necessery of elements for plant. That it was caused yield of grain and other components was increased. Results also showed that in the field with over 30 percent clay and less than 100 mg / kg of potassium in the soil had the highest yield and lowest yield was obtained in the field of with 20-30 percent clay and 100-250 mg/kg potassium in soil.
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