Effect of Nitrogen and Potassium Levels on Quantitative and Qualitative Characteristics of Tuberose ( Polianthes Tuberosa) in North of Khuzestan.
2010
Mahmoodi Nezhad Dezfully, Hosein | Paknejad, Ali Reza | Zadehdabag, Gafor | Ajam gard, Fereydon | Karimpour, Hojat
In order to study the effects of nitrogen, potassium on quantitative and qualitative characteristics of tuberose cv Double, an experiment was conducted at Safiabad Agricultural Research Center during 2010-2011. The design was factorial based on complete randomized block design with 3 replications. The factors included 4 levels of nitrogen: 0, 100, 200 and 300 kg N ha-1 (using urea) and 3 levels of potassium: 0, 150 and 300 kg K2O ha-1 (as potassium sulfate). The results was shown that the effect of potassium was significant on the number of bulb and bulbet (p0.05), but there was not a significant effect on other studied traits. The effect of nitrogen was significant on the length of stem, length of spike, number of floret per spike, stem diameter, leaves nitrogen content, bulb nitrogen content, number of bulb and bulbet, percentage of flowers with high quality (p0.01) and on weight of bulb and bulbet (p0.05). The effect of nitrogen was not significant on the potassium content in leaves and bulb. The NΧK was only significant effect on number of floret per plant, number of bulb and bulbet (p0.01) and it was not a significant effect on other parameters. Using 100 kg. N ha-1 was the best treatment in compared to other treatments in order to obtain optimum growth. Key words: nitrogen, potassium, quantitative and qualitative characteristics, tuberose.
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