| Author | Sureewan Sukontharos |
| Call Number | AIT Thesis no.AS-08-11 |
| Subject(s) | Dendrobium industry
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Agricultural Systems and Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AS-08-11 |
| Abstract | Dendrobium sonia is an excellent for cut-flower which is a profitable venture, but its economic life period limits for three years and hence the growers have to change the crop with new plantings in the fourth year. This study was conducted to explore the possibility to prolong the economic life of four-year old Dendrobium sonia using selected plant nutrients and hormone and growth retardants. Four NPK mixtures (viz. 15-15-15, 30-15-15, 15-30-15, and 15-15-30) and five hormones (viz. paclobutrazol 100 and 200 ppm, gibberellin 50 ppm, cytokinin 200 ppm and combinations of gibberellin 50 ppm and cytokinin 200 ppm) were tested together with the control (viz. NPK of 15-15-15) at three growth stages (viz. plants with inflorescence at less than 15 em, at 15 em and inflorescence fully grown with first flower opened) in a factorial experiment in a complete randomized design with eight replications. The study showed that plants at fully grown inflorescence stage had greater response to treatments than the other two stages. The NPK mixtures 30-15-15 and 15-30-15 promoted greater number of new floral buds in all stages. The growth hormones and retardants had a greater effect at the flower harvested stage. The most effective growth hormone and retardant were cytokinin (200 ppm) and paclobutrazol (200 ppm). However, the nutrient management was more effective in prolonging plant growth thus forming more shoots and new floral buds, reducing time to fonn new floral buds and inflorescence, and enhancing flower quality (i.e. diameter of flower and length of inflorescence) when compared to other growth hormones and retardants. |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AS-08-11 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Aquatic Systems(AS) |
| Chairperson(s) | Ranamukhaarachchi, S. L. |
| Examination Committee(s) | Jayasuriya, H. P. W.;Shrestha, Rajendra P. |
| Scholarship Donor(s) | RTG Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2008 |