Impacts of Nitrogen Fertilizer Sources, Amount and Timing on Yield and Yield Components of Potato in jiroft
محمدرضا بهرامجردی
1
(دانشگاه ازاد جیرفت)
الکلمات المفتاحية: Potato, Yeild, rate, fertiluzer, amount,
ملخص المقالة :
To obtain the optimum N fertilizer amounts, sources and timing for potato, we conducted an experiment in split plot-factorial form based on randomized complete block designs with 3 replicates in Jiroft city, located in the south of Kerman Province, Iran. In this study, we took into account N sources for the main plots and N fertilizer amount and time for the subplots. As to the N fertilizer consumption timings and the levels, T1 stands for the total consumption of N fertilizer during cultivation, T2 for consumption of N at cultivation and the remaining simultaneous with the beginning of flowering and T3 for of N consumption at planting, of N consumption coincided with the soil hilling and at the same time as flowering; N rates were of the levels R1:150, R2:200 and R3:250 kg/ha. Sources were considered to be of two levels: S1=urea and S2-ammonium sulfate. According to our results, treatments were significantly different with regard to yields so as to obtain the highest yield from R3 treatment consumption at the rate 26.72 ton/ha, which statistically had no particular difference from R2 treatment with a rate of 23.86 ton/ha. In addition, the highest yield was obtained from the time T2 with the rate 30.83 ton/ha and from the source S1 the highest yield was 27.38 ton/ ha. Regarding such results, the highest yield belonged to the treatment R2S1T2.
