Investigation of the effect of application rates of nitrogen and phosphorus fertilizers on quantitative and qualitative yields of triticale as a second crop in paddy fields.
2013
Rabiee, Mohammad | Shahdi Koumleh, Abbas | Padasht, Fereidoun | Jilani, Mehrdad
In order to investigate the effect of nitrogen and phosphorus fertilizer rates on yield of Winter Triticale (Triticosecale wittmack var. Javaniloo), a factorial experiment based on the complete randomized block design with three replications was conducted in paddy fields of Rice Research Institute of Iran (Rasht) during 2010-2012 for two years. Experimental factors were nitrogen fertilizer rate in five levels including 0, 50, 100, 150 and 200 kg.ha-1 from urea and phosphorus fertilizer rate in four levels including 0, 50, 100 and 150 kg.ha-1. In this experiment, some agricultural traits such as germination date, growth duration, plant density, number of tillers, plant height, leaf to stem ratio, protein content and yields of fresh and dry forages were studied. The results of combined analysis of variance showed significant differences between the years, nitrogen rate and phosphorus rate in forage yield. The first year had more fresh and dry forages (327240.0 and 9042.7 kg.ha-1, respectively) due to more number of tillers, plant height and plant density. Among different levels of nitrogen fertilizer, 150 and 200 kg.ha-1 had maximum fresh and dry yields due to high number of tillers and plant weight. Among the levels of phosphorus fertilizer, 100 and 150 kg.ha-1 showed maximum fresh and dry forage yields and protein yield. Based on the results, the treatments of 150 kg.ha-1 nitrogen and 100 kg.ha-1 phosphorus are recommended for cultivating triticale in paddy fields of Guilan due to increase in forage yield, less fertilizer consumption. Key words: Nitrogen, Phosphorus, Triticale, Forage yield, Second crop.
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