| Title: | Efficiency of bio and chemical fertilization in presence of humic acid on growth performance of caraway Hort. Dept. , Fac. Agric., Moshtohor, Benha University , Egypt. 4th Scientific Conference of the Agricultural and Biological Research Division Under the theme "Safe Agriculture Products for Health and Environment by Using Recent Technologies; May 5-6, 2008, National Research Centre Agricultural and Biological Research Division Cairo, Egypt". |
| Authors: | Gomaa, A .O. and Youssef, A.S.M. |
| Year: | 2008 |
| Keywords: | Not Available |
| Journal: | Not Available |
| Volume: | Not Available |
| Issue: | Not Available |
| Pages: | Not Available |
| Publisher: | Not Available |
| Local/International: | Local |
| Paper Link: | Not Available |
| Full paper | Ahmed Said Mohamed Youssef_paper carawaya plant.doc |
| Supplementary materials | Not Available |
| Abstract: |
Two field trials were carried out during 2005/2006 and 2006/2007 seasons at the Experimental Farm of Agric Fac., Benha Univ., to study the effect of bio-fertilization, chemical fertilization and humic acid on vegetative growth, seed yield, essential oil and its main components as well as chemical constituents of caraway plants. Treatments were; control (without fertilization), full bio-fertilization applications methods as seed soaking, soil drench and seed soaking+soil drench and control (without fertilization), full chemical fertilization, full humic acid and half chemical+ humic acid. The most important results can be summarized as follows. All application methods of bio-fertilizer (seed soaking, soil drench and seed soaking+soil drench) significantly succeeded in enhancing all the studied traites of caraway plants i.e., plant height, stem diameter, number, fresh and dry weights of branches/plant, number, fresh and dry weights of leaves/plant, number of umbels/plant, seed yield/plant, seeds oil percentage, total chlorophylls (a&b), carotenoides and total carbohydrates, especially with the seed soaking+soil drench treatment. Additionally, all the studied treatments of chemical fertilization and humic acid improved all the studied traites of caraway plants when compared with untreated plants (control) in both seasons. However, the treatment of half chemical+ humic acid statistically produced the highest values of the most studied parameters as compared with the other treatments. GLC analyses for oil components revealed the presence each of Carvone , Hydrocarbons, Limonene, Carveol, Dihydrocarvone, Y-Terpinene and Linalool in the volatile oil of caraway seeds and exhibited that all the tested treatments succeeded in increasing the main component of the volatile oil (Carvone) especially in plants fertilized with half chemical fertilization+humic acid enriched with bio-fertilizer at the seed soaking+soil drench treatment. Generally, bio- fertilization with chemical fertilization and humic acid can minimize chemical NPK fertilizers to half of the used dose, so decreases the environmental pollution, saves the high cost of chemical fertilization and produces high essential oil quality. Conclusively, it is preferable to fertilizer caraway plants with the treatment of half chemical fertlization + humic acid combined with bio-fertilizer as seed soaking+soil drench to achieve the best results regarding vegetative growth, seed yield, seed essential oil % and chemical composition of caraway plant. |
