Response of grain and biological yield in sweet corn to application of different levels of Nitroxin, nitrogen and animal manure

To study the effects of Nitroxin, levels of nitrogen and animal manure on grain and biological yield and nitrogen of sweet corn cultivar Chase, an experiment was conducted in Research Farm of Islamic Azad University of Arak, in 2010 using a factorial experimental design based on randomized complete block with three replications. The studied factors included two levels of Nitroxin (inoculated and noninoculatedseeds), three levels of nitrogen(0, 50 and 100 kgha-1) and three levels of animal manure (10, 20 and 30 tha-1). The results showed that Nitroxin affected ear weight, number of ear per bush, number of grain per bush, length of non-inoculated part, grain yield per ear and biological yield. Animal manure also affectect ear weight, length of non- inoculated part, ear harvest index, grain yield per ear and biological yield, so that decreased the length of non- inoculated part and increased other characteristics. Effect of nitrogen on length of non- inoculated part, ear harvest index, biological yield and nitrogen content of plant was significant. The highest grain yield per ear (52.92g) was obtained in treatment of inoculation of seed with Nitroxin, 20 tha-1 of animal manure and 50 kg ha-1 of nitrogen application. In addition to reduction of chemical fertilizer, consumption, jointly application of chemical fertilizer, animal manure and biologic fertilizer caused a considerable increase in grain yield of sweet corn.