growth and yield response to different nitrogen levels Potato plant

This experiment was conducted in Andimeshk Region (north of Khouzestan) to study the effects of nitrogen levels on plant characters of two potato cultivars (Solanum tuberosum L.) in identical conditions of poultry manure, in 2012-2013 crop year, as a factorial randmaized complete block design with three replications. The first factor was consisting of four nitrogen levels (0, 70,140 and 210 kg/ha). The second factor was consisting of two potato cultivars (cv. ‘Arinda’ and ‘Sante’). The results showed that cv. ‘Arinda’ was significant in all the tested characters (plant height, stems per plant, tubers per plant, tuber weight per plant, micro tuber numbers, macro tuber numbers and tuber yield) exception medium tuber numbers compared with cv. ‘Sante’. The highest tuber yield was observed at cv. ‘Arinda’ and N1 fertilizer treatment with mean of 41870.3 kg/ha and lowest tuber yield in cv. ‘Sante’ and N0 fertilizer treatment with mean of 20437.6 kg/ha. Therefore, the cv. ‘Arinda’ in the consolidated conditions with lower consumption of nitrogen fertilizer up to 70 kg/ha has all desirable plant characters for increasing of tuber yield, and it is recommended for cultivation in climate conditions of region.