H. Sartip; I. Khammari; M. Dahmarde
Abstract
Karela (Momordica charantia L.) is a plant with multiple medicinal properties, whose fruits are used to control diabetes. In order to study the effects of biological and chemical fertilizers on quantitative and qualitative properties and secondary metabolites of Karela, an experiment was conducted ...
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Karela (Momordica charantia L.) is a plant with multiple medicinal properties, whose fruits are used to control diabetes. In order to study the effects of biological and chemical fertilizers on quantitative and qualitative properties and secondary metabolites of Karela, an experiment was conducted as a randomized complete block design with three replications in the Research Field of Agricultural Research Institute of Zabol University. Experimental treatments included: control or 100 percent chemical fertilizer (F1), nitroxin + fertile phosphate 2 (F2), nitroxin + fertile phosphate 2 + 75 percent chemical fertilizer (F3), nitroxin + fertile phosphate 2 + 50 percent chemical fertilizer (F4), nitroxin + fertile phosphate 2 + 25 percent chemical fertilizer (F5), biological nano-fertilizer (F6), biological nano-fertilizer + 75 percent chemical fertilizer (F7), biological nano-fertilizer + 50 percent chemical fertilizer (F8) and biological nano-fertilizer + 25 percent chemical fertilizer (F9). The results of analysis of variance indicated that the effects of application of different chemical fertilizer levels along with biological fertilizers were significant on photosynthetic pigments and fruit performance per area. Comparison of means showed significant superiority of combination of biological and chemical fertilizers compared to separate application of these fertilizers. The highest concentration of chlorophyll a (30.66 mg/gr.fw) and leaf carotenoids (8.91 mg/gr.fw) were obtained in F3 and F4 treatments, respectively. The highest fruit yield was obtained in F4 treatment, showing an increase of 25.33 percent compared to control treatment. The effects of fertilizer treatments were highly significant on production of carnitine, so that the lowest and highest content were obtained in F3 treatment (0.93 mg/gr.dw) and F7 treatment (3.42 mg/gr.dw), respectively. Results of this research showed that application of biological fertilizers including nitroxin and fertile phosphate 2 in combination with 75 and 50 percent of chemical fertilizer had a positive effect on improvement of physiological traits and fruit performance of Karela. Therefore, instead of continuous use of fertilizers, steps could be taken towards sustainable agriculture by optimizing the use of biological inputs.
M. Nemati; M. Dahmardeh; E. Khmmari; M. Nejati
Abstract
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, ...
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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.