Effect of biofertilizer and manure application on economic yield and quality characteristics of Roselle (Hibiscus sabdariffa L.)
To study the effect of biological and manure fertilizers on economic yield and quality characteristics of roselle (Hibiscus sabdariffa L.)، an experiment was conducted as split plot based on a randomized complete block design with three replications at the Agricultural Research Center of Zabol University، Iran during growing season of 2012. Treatments included three manure levels; 0، 10 and 20t. h-1 and eight levels of biofertilizer including control، nitroxin، bio-sulfur، biological phosphorus، nitroxin+bio-sulfur، nitroxin+biological phosphorus، bio-sulfur+biological phosphorus، nitroxin+bio-sulfur+biological phosphorus. Different levels of manure fertilizer and biofertilizers were considered as main plots and subplots، respectively. Traits included economic yield، leaf SPAD، chlorophyll a، b، carotenoids، carbohydrates، anthocyanin، protein، potassium and phosphorus. According to the obtained results different levels of manure and bio-fertilizer treatments and their interactions on biological traits were significant. The maximum economic yield (1290kg. h-1) and protein content (841. 42mg. g-1) was obtained with a combined consumption of 10 tons of manure per hectare and nitroxin. The highest amount of anthocyanins (0. 45μg. g-1) and carbohydrates (1035. 7μg. g-1) in sepals was obtained at 20t. h-1 manure+bio-sulfur+biological phosphorus. The use of 20t. h-1 manure and nitroxin، bio-sulfur and biological phosphorus caused an increased leaf SPAD، chlorophyll a، b، carotenoids، phosphorus and potassium as compared to control. Our results clearly showed that combined use of manure and biological fertilizers could play an important role in increasing the economic yield and quality characteristics of roselle in comparison with the separate consumption.
Iranian Journal of Medical and Aromatic Plants, Volume:31 Issue:4, 2015
610 - 625
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