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Annals of Botany 33: 133-142, 1969
© 1969 Annals of Botany Company

RESEARCH-ARTICLE

Effect of Bulb Size on the Growth of Tulips

A. R. REES

Glasshouse Crops Research Institute Littlehampton, Sussex

Accepted: 15 July 1968   

A study of the growth in the field of tulip plants from bulbs of four different sizes showed marked differences of leaf area and shoot dry weight, those produced by larger bulbs being the greater. Relative growth rates of the smaller plants were higher than those of the large ones; this was due to different proportions of total plant weight being non-growing mother bulb, as the relative growth rates of the shoots were not affected by bulb size. The relative growth rates of daughter bulbs were also unaffected by the mother bulb size, being very similar to previously determined values in other sites and seasons. The final bulb yield was proportional to daughter bulb weight early in the season. It is suggested that daughter bulb weight, shoot weight, and leaf area are directly related to the size of the mother bulb, and controlled by the factors determining mother bulb size during its development.


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