the effects of three and five years continuous periods of municipal solid waste aapplication on the amount of micronutrient elements in wheat shoot and seed

in order to investigate the effects of applying three and five continuous periods of municipal solid waste (msw) with and without npk chemical fertilizer on the amount of micronutrient uptake by different parts of wheat, a pot experiment was conducted in split plot based on randomized complete block design with four replications in 2009. the main plot was a six-fertilizers level including control (without msw and chemical fertilizer), chemical fertilizers according to soil test (200 kg urea, 150 kg triple superphosphate, and 100 kg k2so4 per ha) and 4 levels of msw (20 and 40 ton.ha-1 without fertilizer and with half of fertilizer) and the sub plot was applying 3 and 5 continuous periods of msw. the results showed that, by increasing the amount and periods of applying msw, the concentration of zn and mn in flag leaf and straw of wheat increased, with the maximum amount of obtained with the application of five consecutive periods 40 ton msw enriched with half of npk fertilizer. also, by increasing the amount of applying msw, concentration of fe increased in flag leaf. dmoreoven, in wheat seed, the most amount of zn, fe and mn was observed by applying 5 consecutive periods 40 ton msw enriched with 1/2 fertilizer in soil. meanwhile, by increasing the amount of applying msw in soil, the concentration of cu increased in flag leaf, straw and kernel wheat flag leaf, shoot and seeds, and the effects of periods of application of msw was just showed in wheat seeds.