Determining the best concentration of N and Micronutrients in fertigation of wheat
2011
Basirat, Majid | Ziaeyan, Gholamhossien | Motalebifard, Rahim | Gosheh, Mohiadin
In order to compare fertigation application of nitrogen and micronutrients in wheat production with soil application and determeination of optimum rate for them an experiment was done in 4 regions (Karaj, Khozestan, Hamedan, Fars). The statistical design was based on single line source in sprinkler pressurized system. The irrigation lines were installed in 5 rows with one fertigation line in the middle. The fertilizer application was based on soil test and injected with a ventory in fertigation plots. Distribiution of amunium nitrate and Fe, Mn and Zn-EDTA were applied via fertigation system and its distribiutions were not uniform. Concequently the plots received different rates of fertilizers based on the distance(3,6 and 9 m) from injector line. The results showed that nitrogen increased 1000 grian weight, grain and biomass yield in comparison with soil application in the first(3m) plots significantly.further more results suggested that the maximum yield (5156 kg/ha) and 1000 grain weight were obtained by 134.4 kg/ha nitrogen whereas soil application produced 4442 kg/ha grain yield with average 184 kg/ha N as NH4NO3. In Fars, maximum yield was obtained by 350 kg/ha of amunium nitrate where in hamedan, it was 290 kg/ha. There was no significan differences between fertigation and soil application in khozestan. there are significant correlation between Fe, Mn and Zn leaf concentrations and yields. Also there is significant correlation between soil nutrients concentrations and leaf nutrient level in samples. In hamedan, the maxiumum yield was produced by 2.4 kg/ha Fe-EDTA and 5.2 Kg/ha Zn-EDTA in fertigation system.
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