EFFECTS OF FERTILIZER FORMULATIONS ON FLOWERING OF DORITAENOPSIS 'I-HSIN MADAME' IN GRADATIONAL NUTRITION MANAGEMENT
| Autor: | K.-H. Chang, T.-F. Hsieh, R.-Y. Wu |
|---|---|
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Acta Horticulturae. :347-353 |
| ISSN: | 2406-6168 0567-7572 |
| DOI: | 10.17660/actahortic.2010.878.43 |
| Popis: | Previous reports showed that an increase in phosphorous (P) application did not stimulate spike induction and flowering of Phalaenopsis when potassium (K) application was sufficient, whereas an increase in nitrogen (N) application promoted flowering. However, excessive N concentrations could prolong the time required for anthesis of Phalaenopsis. The objective of this research was to determine effects of different formulations of fertilizers with gradational nutrition management on the flowering of Doritaenopsis (Dtps.) 'I-Hsin Madame'. Compared to the invariable nutrition management, plants of Dtps. had higher spike emergence rates, faster growth of flowering spikes and earlier anthesis under the gradational nutrition management of fertilizer, 10-20-20 (N-P 2 O 5 -K 2 O) or 20-20-20 (N-P 2 O 5 -K 2 O). At the same level of K application, higher amounts of N application accelerated the growth of flowering spikes and increased number of flowers on each plant. Although growth of Dtps. Spikes was dependent upon supply of the N fertilizer, increased amount of N application resulted in decreased width of flower petals. This study suggests that decreased petal width may be due to an imbalance of N and K uptake by the plant or insufficient amount of carbon accumulation in the flower. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|