In order to investigate the effect of plant spacing and harvesting age on growth, biomass and oil yield of rose-scented geranium; a study was carried out at the research field of Wondo Genet Agricultural Research Center in the 2013/14 cropping season. The study was a 4 x 5 factorial combination based on randomized complete block design (RCBD) with three replications. The experiment was consisted of four levels of plant spacing (30 x 30, 30 x 40, 30 x 50 and 30 x 60 cm, which result in 111111, 83333, 66666 and 55555 plants/ha, respectively) and five levels of harvesting age (90, 105, 120, 135 and 150 days after transplanting (DAT)). Main effects of plant spacing and harvesting age significantly influenced plant height, number of internodes, internodes length, leaf area and dry leaf weight/plant. While interaction effect of the two factors significantly influenced number of branches/plant, number of leaves/plant, leaf area index, fresh leaf weight/plant, aboveground biomass/ha, fresh leaf yield/ha, dry leaf yield/ha, dry stem yield/ha, harvest index, essential oil content and essential oil yield/ha. The finding revealed that higher number of branches and leaves were recorded at 30 x 60 cm spacing combined with 90 and 135 DAT and higher leaf area, dry leaf weight and fresh leaf weight were recorded at 30 x 60 cm along with 120, 135 and 120 DAT, respectively. At 30 x 30 cm spacing combined with 150, 120 and 150 DAT, highest plant height, leaf area index and number of internodes were obtained; while, the highest aboveground biomass, fresh leaf yield, dry stem yield and dry leaf yield were produced at 30 x 30 cm spacing with 120, 135, 150 and 135 DAT, respectively. Significantly higher essential oil content and harvest index were produced at the treatment combination of 30 x 40 cm spacing when harvested at 90 DAT. On the other hand, the essential oil yield (21.01kg/ha) at 30 x 30 cm plant spacing when harvested at 135 DAT was relatively higher than those of all treatment combinations, which, however it did not statistically different with that of 30 x 30 cm combined with 120 DAT (20.87 kg/ha). In total, it can be recommended to use 30 x 30 cm spacing level with harvesting age of 120 to 135 DAT for essential oil yield production at Wondo Genet area.
Inhaltsverzeichnis
- Dedication
- Acknowledgments
- List of Abbreviations and Acronyms
- List of Tables
- List of Figures
- Abstract
- Introduction
- Literature Review
- Materials and Methods
- Study Area
- Experimental Design and Treatments
- Plant Materials
- Soil Analysis
- Field Management Practices
- Data Collection
- Plant Height
- Number of Branches
- Leaf Area Index
- Fresh and Dry Biomass
- Essential Oil Yield
- Essential Oil Composition
- Data Analysis
- Results and Discussion
- Effect of Plant Spacing on Growth and Biomass
- Effect of Harvesting Age on Growth and Biomass
- Effect of Plant Spacing and Harvesting Age on Essential Oil Yield
- Effect of Plant Spacing and Harvesting Age on Essential Oil Composition
- Conclusion
- Recommendations
- References
- Appendices
Zielsetzung und Themenschwerpunkte
This thesis investigates the effects of plant spacing and harvesting age on the growth, biomass, and essential oil yield of rose-scented geranium (Pelargonium graveolens L. Herit). The study aims to determine the optimal plant spacing and harvesting age for maximizing essential oil yield and quality.
- The impact of plant spacing on growth, biomass, and essential oil yield.
- The influence of harvesting age on growth, biomass, and essential oil yield.
- The interaction effects of plant spacing and harvesting age on essential oil yield and composition.
- The optimal plant spacing and harvesting age for maximizing essential oil yield and quality.
- The relationship between growth parameters, biomass, and essential oil yield.
Zusammenfassung der Kapitel
The introduction provides a comprehensive overview of rose-scented geranium, its cultivation, and the importance of essential oil production. It highlights the significance of plant spacing and harvesting age in influencing yield and quality. The literature review delves into existing research on the effects of these factors on geranium growth, biomass, and essential oil yield. It also explores the chemical composition of geranium essential oil and its various applications. The materials and methods section outlines the experimental design, treatments, plant materials, soil analysis, field management practices, data collection, and data analysis techniques employed in the study. The results and discussion section presents the findings of the experiment, analyzing the effects of plant spacing and harvesting age on various growth parameters, biomass, essential oil yield, and essential oil composition. It also discusses the implications of these findings for geranium cultivation and essential oil production. The conclusion summarizes the key findings of the study and highlights the optimal plant spacing and harvesting age for maximizing essential oil yield and quality. The recommendations section provides practical suggestions for improving geranium cultivation practices based on the study's results. The references list provides a comprehensive bibliography of relevant literature cited in the thesis. The appendices contain additional information, such as tables and figures, that support the findings of the study.
Schlüsselwörter
The keywords and focus themes of the text include rose-scented geranium, Pelargonium graveolens, plant spacing, harvesting age, growth, biomass, essential oil yield, essential oil composition, citronellol, geraniol, GC-MS, and optimal cultivation practices. The study investigates the effects of plant spacing and harvesting age on the growth, biomass, and essential oil yield of rose-scented geranium, aiming to determine the optimal conditions for maximizing yield and quality. The research explores the relationship between growth parameters, biomass, and essential oil yield, as well as the impact of these factors on the chemical composition of the essential oil. The study utilizes GC-MS analysis to identify and quantify the major components of the essential oil, including citronellol and geraniol. The findings provide valuable insights into the optimal cultivation practices for rose-scented geranium, contributing to the sustainable production of high-quality essential oil.
- Citar trabajo
- Haileslassie Gebremeskle (Autor), 2015, Effect of plant spacing and harvesting age on growth, biomass and oil yield of rose-scented geranium (Pelargonium graveolens L. Herit), Múnich, GRIN Verlag, https://www.grin.com/document/288955
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