Effect of consumption of nitrogen and phosphorus fertilizers on harvest indices and some important agronomical traits of Triticale (Triticosecale Wittmack) in Guilan area

In order to investigate the effect of consumption of nitrogen and phosphorus fertilizers on harvest indices and some important agronomic traits of Triticale (Triticosecale wittmack var. Javaniloo)، a factorial experiment based on the randomized complete block design with three replications was conducted in paddy field of Rice Research Institute of Iran (Rasht) during 2010-2012 for two years. The first factor was nitrogen in five levels: zero، 50، 100، 150 and 200 kg. ha-1 in the form of urea and phosphorus in four levels: zero، 50، 100 and 150 kg. ha-1 in the form of superphosphate. Results showed that among the nitrogen levels، the treatments of 200 and 150 kg. ha-1 had maximum grain yield (3000. 5 and 2999. 7 kg. ha-1، respectively)، protein yield (442. 7 and 449. 5 kg. ha-1، respectively) and biological yield (13318 and 12525 kg. ha-1، respectively). Among the levels of phosphorus fertilizer، the treatment of 150 kg. ha-1 showed maximum grain yield (2971. 0 kg. ha-1)، protein yield (434. 4 kg. ha-1) and biological yield (12375 kg. ha-1). Also results showed none of the nitrogen levels had the highest phosphorus and potassium indices. Moreover، with the increasing of nitrogen، phosphorus and potassium indices were reduced. Based on the obtained results، the treatments of 150 kg. ha-1 nitrogen and 150 kg. ha-1 phosphorus are recommended for cultivating triticale in Guilan area due to high grain and protein yields.