Sanjari, M. (2014) The effect of drought stress and humic acid on qualitative and quantitative characteristics of Roselle (Hibiscus Sabdariffa L.). Masters thesis, University of Zabol.
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Abstract
To study the effect of humic acid and drought stress on quantity and quality characteristics of Roselle (Hibiscus sabdariffa) an experiment was conducted in the research of agricultural education Centre Jiroft in 2013. Field experiment was carried out as split plot design with three replications. Water deficit stress set as main factor with three levels (A1 =Irrigation after 50, A2 = 100 and A3 =150 mm evaporation from pan class A) and humic acid was in four manners (B1= non-humic acid, B2= once with Irrigation, B3= once with Irrigation + Once spraying, B4= once with Irrigation + twice Spraying). The applying humic acid forms irrigation and spray to arrange with compactness (10kg/ha) - (250ml/100l). Results showed that the significant effect of drought stress on height, diameter, vegetative and generative yield, potassium, phosphor, sodium content, anthocyanin, chlorophyll a, chlorophyll b, carotenoids, Cell Membrane Stability, relative humidity and Proline. The drought stress is increased and these characters are reduced. Except sodium and Proline, levels in severe stress conditions are added. The effect of humic acid treatments on plant height, plant diameter, vegetative and generative yield, chlorophyll, chlorophyll a, chlorophyll b, carotenoids and the amount of phosphorus, potassium, sodium, and anthocyanin was significant. Therefore, all characters mentioned by increasing the amount of humic acid are increased. The interaction affects significantly on number of branches, chlorophyll content, and potassium, phosphor content, vegetative yield and carbohydrate. Therefore, the highest traits obtained by applying Irrigation after 50 and once with Irrigation + twice spraying humic acid. The highest carbohydrate obtained by applying Irrigation after 100 and once with Irrigation + twice spraying humic acid. According to the results of this experiment, we can say that humic acid could play important roll in increasing quantity and quality characteristics and offset the harmful effects of drought stress on the plant Roselle
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Anthocyanin, Drought stress, Humic acid, Chlorophyll, Roselle |
| Subjects: | S Agriculture > SB Plant culture |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 05 Apr 2016 04:19 |
| Last Modified: | 05 Apr 2016 04:19 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/208 |
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