بررسی تاثیر روش کاشت و مقدار کاربرد نیتروژن بر خصوصیات رشدی پیاز در حضور اویارسلام ارغوانی

In order to study the effect of sowing methods and amount of nitrogen application on growth characteristics of onion in the presence of purple nutsedge, a factorial experiment based on randomized complete block design was conducted with three replications at the Research Greenhouse of University of Birjand in 2013. The first factor included three sowing methods of onion (using seed, onion set and transplanting) and the second factor included three levels of nitrogen (50, 100, 150 kg.ha 1). ANOVA results showed that the sowing methods and levels of nitrogen as well as their interaction had a significant effect (P˂0.01) on all studied traits of onion. Overall, results of this study indicate the superior impact of an anion set planting and application of 100 kg ha-1 nitrogen on all growth characteristics of onion in the presence of purple nutsedge. So, the application amount of 100 kg ha-1 of nitrogen and onion set planting can be recommended as the most appropriate management treatment in onion fields infected with purple nutsedge.