ArsanjanY, Z. (2015) Effect of superabsorbent and animal manure application on quantitative and qualitative characteristics of ajwain under different levels of drought stress. Masters thesis, University of Zabol.
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Abstract
Drought stress is one of the most important factors that reduce growth and yield of many crops, especially in arid and semi-arid era. In order to evaluate the effects of superabsorbent and animal manure application on quantitative and qualitative characteristics of Ajowan, under different levels of drought stress, a farm experiment was conducted as split-factorial on the base of randomized complete block design at cropping season 2014 in Agricultural research Institute, university of Zabol. The main plot was drought stress in three levels (control: irrigation after 60 mm evaporation farm class A basin, moderate stress: irrigation after 120mm evaporation from class A basin, high stress: irrigation after 180mm evaporation from class A basin. The subplot cons consisted of different amounts of superabsorbent at 3 levels (zero, 100 and 200 kg/ha) and manure at 2 levels (zero and 200 kg/ha). Data analysis showed that stress with adverse effects on plants, specialty reduction of photosynthetic pigments (chlorophyll, b and total carotenoids) significantly reduced plant high, number of umbrella per plant, 1000-seed weight, yield, biological yield, harvest index and essential oil yield. In contrast, it increased essential oil percent, praline, carbohydrate, catalase, and ascorbic oxidase and polyphenol oxidase enzymes. In addition drought stress significantly decreased Guaiacol peroxidase activity. The application of superabsorbent increased yields complaints, essential oil yield, and biological yield of Ajowan; with modifying effects of drought stress and increasing photosynthetic pigments. The application of superabsorbent with 200kg/ha was more effective for reducing the accumulation of praline, catalase, Ascorbat oxidase, Guaiacol peroxidase in comparison with other superabsorbent levels. Superabsorbent increased seed weight, harvest index and polyphenol oxidase activity but this increase was not statistically significant. Adding manure to the soil caused similar effects of superabsorbent on plant. In contrast, the essential oil content, Proline and carbohydrates, catalase, Ascorbate, oxidase and polyphenol oxidase were increased. In addition, drought significantly decreased Guaiacol peroxidase activity. Among the different treatments of 200 kg per hectare in comparison with other absorbent surfaces in reducing the accumulation of Proline and catalase, Ascorbate, oxidase, Guaiacol peroxidase was more effective. The superabsorbent increased seed weight, harvest index and polyphenol oxidase activity, but this increase was not statistically significant. Adding manure to the soil superabsorbent has similar effects on wheat. The use of superabsorbent with manure modified the stress effects on quantitative traits (plant height, number of umbrella per square meter, grain weight, yield, biological yield, harvest index, and oil yield) and qualitative characteristics (concentration of photosynthetic pigment, Proline, carbohydrates, Catalase, Ascorbate peroxidase, polyphenol oxidase, Guaiacol peroxidase enzymes). The result indicated that the use of manure and superabsorbent can reduced negative effects of drought stress by increasing the amount of chlorophyll and the improvement of vegetative group.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Ajowan, Super absorbent, animal manure, Drought stress, Anti-oxidant enzyme, Essential oil |
| Subjects: | S Agriculture > SB Plant culture |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 28 May 2016 05:51 |
| Last Modified: | 28 May 2016 05:51 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/662 |
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