Comparison of the effect of different nitrogen sources on the yield of corn.
1998
Salim Pur, Saeid | Malakuti, Mohammad Jafar | Pak Nezhad, Ali Reza | Hasir Chin, Mohammad Ali
In order to compare the available nitrogen sources and determin the best on form the point of nitrogen up-take capacity and the optimum level for highest yield, a factorial experiment design in complete randomized blocks, with 5 different nitrogen sources and 3 nitrogen rate in 3 replications was conduct at the SARC trial farm for two years 1375 and 1376. Fertility treatments. Nitrogen sources 1-Commecial Urea 2-SCU (Home made) 3-SCU (imported) 4-Amonium Nitrate 5-Amonium Sulfat Nitrogen level N1=187 kg/ha N2=250 kg/ha N3=312 kg/ha. The 2 years results showed: 1-for nitrogen sources there was: a- significant difference at %1 level in grain yield. b- significant difference at %5 level in protein content. 2- for nitrogen level there was: a-non significant difference in yield. b-significant difference at %1 level in protein content. 3-the treatment of imported (SCU) with 312 kg/ha. net nitrogen had the highest grain yield of 6760 kg/ha. with the highest protein of %9.1.
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