Developing a cropping system for snapdragons (Antirrhinum majus L.) based on flowering response
2005
Inaba, Z.(Shizuoka-ken. Agricultural Experiment Station (Japan)) | Horiuchi, M. | Ohshiro, M.
A new cropping system for the warm temperature zone in Japan was developed on the basis of the flowering response in the non - pinching cultivation in snapdragons (Antirrhinum majus L.). First, the duration between the time the seeds were sown (every month) and the time to flowering were determined. The number of days from sowing to flowering was longest when seeds were sown in October; it was shortest when sown in June. The plant height was shortest when seeds were sown in June whereas it was tallest when sown in September. The cultivars bred in Japan seemed to belong to Group I or Group II. For harvest of cut flowers from summer to autumn, seeds of Group III cultivars that were sown in the mid - June to the end of July or those of Group IV sown between mid - June to mid - July yielded the best results. For optimum harvest from autumn to winter, seeds of Group I or II cultivars should be planted from mid - August to mid - October. To harvest flowers from spring to summer, we planted seeds of Group I and II cultivars in February or those of Group III and IV from the end of February to March. This cropping system makes cut snapdragon flowers available throughout the year.
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