ISHS Acta Horticulturae 111: Symposium on Vegetable and Flower seed Production
ARE THE PLANT DENSITIES CURRENTLY USED FOR CARROT SEED PRODUCTION TOO LOW? |
| Author: | D. Gray |
| Abstract:
The responses of seed yield and quality in carrot to a range of plant densities from 100 000 to 800 000 plants ha-1 (root to seed method) and from 110 000 to 2 560 000 plants ha-1 (seed to seed method) was examined. Yields of seed from the root to seed method increased from ca. 1 100 to 1 500 kg ha-1 as plant density increased from 100 000–800 000 plants ha-1. For the seed to seed method yields increased from 700 to 2 400 kg ha-1 over the range of densities used. At the highest densities ca. 60% of the seed yield was produced from primary umbels compared with less than 20% at the lowest density. There were no significant effects of plant density on plant height, time of flowering, crop maturity and there was no consistent effect on mean seed weight. | |
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