Effects of sowing time on seed yield and germination of rocket larkspur (Consolida ajacis (L.) Schur)
2019
Mori, Y.
In rocket larkspur cut flower cultivations in Okayama Prefecture, it is common to use seeds produced by cut flower farmers. However, no studies have been conducted on the amount or germination ability of the produced seeds based on the sowing time. Our aim in this study was to investigate the relationship between the sowing time and the amount of seeds or the seeds' germination ability, in order to understand better how an efficient rocket larkspur seed production can be obtained. The number of early germinable seeds (the number of harvested seeds multiplied by the germination rate) was highest in the October sowing, followed by the April-July sowings. The highest number of total germinable seeds (the number of harvested seeds multiplied by the germination percentage) was obtained from the October sowing, followed by the April-July and September sowings. The period from flowering to seed maturity was the shortest in the April sowing, followed by the February, June, and October sowings. The cultivation cost from flowering to seed maturation was estimated to be the lowest in the April and February sowings, followed by the June sowing. These results suggest that the April sowing is the most suitable for rocket larkspur seed production.
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