N. Ghayoumi- Mohammadi; H.A. Asadi-Gharneh
Abstract
Roselle (Hibiscus sabdariffa L.) is a valuable medicinal plant widely used in the pharmaceutical, food, and industrial products. In order to investigate the effects of vermicompost and seaweed foliar application on quantitative and qualitative traits of roselle, this research was carried out in Islamic ...
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Roselle (Hibiscus sabdariffa L.) is a valuable medicinal plant widely used in the pharmaceutical, food, and industrial products. In order to investigate the effects of vermicompost and seaweed foliar application on quantitative and qualitative traits of roselle, this research was carried out in Islamic Azad University, Isfahan Branch in spring, summer and autumn of 2016. The experiment was conducted as factorial in the form of a randomized complete block design with three replications. Vermicompost treatments were applied on four levels: zero (control), 5, 10 and 15 ton/ha, and seaweed spraying at three levels: 0 (control), 1 and 1.5g/L at intervals of one month. At the end of experiment, plant height, number of flowers, fresh and dry weights of the plant, fresh and dry weights of calyx, chlorophyll a, b and total, anthocyanin content, vitamin C, flavonoids and titratable acidityof calyx were measured. The results indicated that the use of seaweed and vermicompost improved the quantitative and qualitative characteristics of roselle. The highest plant height, number of flowers per plant, fresh and dry weights of plant and calyx, chlorophyll a, b and total, anthocyanin content, titratable acid, and vitamin C in calyx, were measured in vermicompost 15 ton/ha. Also the highest amount of chlorophyll a, anthocyanin, flavonoids, titratable acid, and vitamin C of calyx, number of flowers per plant and fresh weight of plant were measured in 1.5 g/l seaweed. The highest amount of vitamin C (68.74 mg/100g), titratable acid (4.97%), anthocyanin (1.400mg/g) in calyx, number of flowers per plant (73.33) and plant fresh weight (828.33 g) were observed in vermicompost 15 ton /ha with the foliar application of seaweed 1.5 g/l.
A. Sepahrom; S.Gh. Moosavi
Abstract
In order to study the effect of low irrigation and nitrogen fertilization on morphological traits, sepal yield, and yield components of Roselle (Hibiscus sabdariffa L.), an experiment was conducted as split plot design based on randomized complete blocks with three replications, at Saravan, Iran in 2010. ...
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In order to study the effect of low irrigation and nitrogen fertilization on morphological traits, sepal yield, and yield components of Roselle (Hibiscus sabdariffa L.), an experiment was conducted as split plot design based on randomized complete blocks with three replications, at Saravan, Iran in 2010. In this research, irrigation was considered as main factor with three levels (irrigation after 60, 120 and 180 mm evaporation from pan class A) and nitrogen rate was considered as sub factor with four levels (0, 60, 120 and 180 kg N.ha-1). The results showed that irrigation and nitrogen levels had significant effect on plant height, stem diameter, fruit number per m2, sepal fresh and dry yield, and biological yield. However, sepal dry weight per single fruit and sepal harvest index per fruit were only affected by irrigation, and sepal harvest index per plant was only affected by nitrogen. The interaction effect between irrigation and nitrogen significantly affect the sepal fresh and dry yield. According to the means comparison, increasing of irrigation intervals from 60 to 180 mm evaporation reduced the plant height, stem diameter, fruit number per m2, sepal fresh and dry yield, biological yield, and sepal dry weight per single fruit to 48.1%, 31.8%, 41.3%, 58%, 54.9%, 67% and 22.7%, respectively. In addition, the increased use of nitrogen from 0 to 120 kg.ha-1 could increase the mentioned traits to 13.7%, 8.6%, 37.1%, 43.3%, 44.1%, 25.5%, and 5.7%, respectively. Overall, according to the results of current study, irrigation after 120 mm evaporation with 180 kg N. ha-1 treatmentcould be suggested for roselle cultivation in Saravan, Iran.
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.
