بررسي اثر مقادير و روش هاي مختلف كودهاي حاوي روي بر عملكرد سويا

The evaluation of the different rates and methods of Zn-fertilizer application on soybean yield

Soybean is one of the major crop in our country specially in Mazandaran and Gorgan Province. Due to the very important nutrition value as wel as significant role of soybean in food industry, doing no research about the effect of micro elements on soybean, and regard to Zn-role in soybean , this experiment was conducted to evaluate the effect of different rate and methods of Fe- fertilizers on soybean yield. The test conducted in field experiment by 0 , 30 , 60 , 120 kg/ha Zinc Sulfate treatment. The methods of application were banding and brodcasting , with and without foliar (3/1000 Zinc Sulfate) application. After farming and management practices , the crop yield and the weight of thousand seeds were determind at harvest for every plot. The results indicated that the maximum yield was in three treatments: one," 30 kg/ha zinc sulfate with band method and use of foliar application" treatment (2580 kg/ha). Other treatments were "60 kg/ha Zinc Sulfate with band , brodcast and use of foliar application with 2490 kg/ha, 2420 kg/ha yield. The effect of Zn-fertilizers and the method of application werenʹt significant on height of plant and thousand seed weight (1% and 5% level).