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The effect of plant density, date of apical bud removal and leaf removal on the growth and yield of single-harvest Brussels sprouts (Brassica oleracea var. gemmifera D.C.): I. Whole plant and axillary bud growth

Published online by Cambridge University Press:  27 March 2009

N. M. Fisher  and
G. M. Milbourn
N. M. Fisher
Affiliation:
Wye College (University of London), Ashford, Kent
G. M. Milbourn
Affiliation:
Wye College (University of London), Ashford, Kent
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Summary

Three field experiments are described in which the effect of plant density and date of stopping (removal of the apical bud) on the development of yield in several Brussels sprout cultivars was studied. In a fourth experiment, the effect of a leaf removal treatment was designed to assess the possible remobilization of dry matter to the buds from senescing leaves.

A total plant dry weight of 1·2 kg/m2 was achieved with a hybrid cultivar at commercial densities. Although the crop growth rate was low in midsummer, growth continued until mid-October. Bud dry weight yield was curvilinearly related to plant density with 2 plants/m2 giving the highest yields of 0·35 kg/m2 in stopped crops in November. Rapid bud growth did not begin until September but the increase in bud dry weight continued into December and January. Early stopping increased bud dry weight yield and the ratio of bud weight to total shoot weight. In November, bud dry weight accounted for 25–40% of the total shoot dry weight for most treatments.

In the leaf removal experiment, estimated net photosynthetic rate of the crop was greater than the bud growth rate up to the end of the experiment and there was no significant effect of removing leaves just prior to natural senescence on bud dry weight.

The production and partition of dry matter is discussed in comparison with other vegetative crops. It is found that the proportion of total dry weight partitioned to the useful parts in Brussels sprouts is comparatively low. Factors controlling the date at which rapid bud growth begins are discussed. It is concluded that the dry matter in the axillary buds is derived from photosynthesis occurring at the time of bud growth and that the remobilization of dry matter from other plant parts is not of great importance.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 83 , Issue 3 , December 1974 , pp. 479 - 487
Copyright
Copyright © Cambridge University Press 1974

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References

Bremner, P. M. & Radley, R. W. (1966). Studies in potato agronomy. II. The effects of variety and time of planting on growth, development and yield. Journal of Agricultural Science, Cambridge 66, 253–61.CrossRefGoogle Scholar
Fisher, N. M. (1972a). Brussels sprouts: estimated optimum plant population and the effect of stopping for single-pick harvesting. Experimental Horticulture 24, 83–92.Google Scholar
Fisher, N. M. (1972b). An analysis of the yield of single-harvest Brussels sprouts (Brassica oleracea var. gemmifera D.C.) Ph.D. Thesis, University of London.Google Scholar
Ivins, J. D. & Bremner, P. M. (1965). Growth, development and yield in the potato. Outlook on Agriculture 4, 211–17.CrossRefGoogle Scholar
Jones, L. H. (1972). The effects of topping and plant population on dry matter synthesis and distribution in Brussels sprouts. Annals of Applied Biology 70, 77–87.CrossRefGoogle Scholar
Nieuwhof, M. (1969). Cole Crops. London: Leonard Hill.Google Scholar
Radford, P. J. (1967). Growth analysis formulae: their use and abuse. Crop Science 7, 171–5.CrossRefGoogle Scholar
Sandwell, I. (1970). Report of the Stockbridge House Experimental Horticulture Station for 1969, p. 20. London: Ministry of Agriculture, Fisheries and Food.Google Scholar
Scott, R. K. & Bremner, P. M. (1966). The effects on growth, development and yield of sugar boet of extension of the growth period by transplantation. Journal of Agricultural Science, Cambridge 66, 379–88.CrossRefGoogle Scholar
Stokes, P. & Verkerk, K. (1951). Flower formation in Brussels sprouts. Mededelingen van der Landbouwhogeschool, Wageningen 50, 141—59.Google Scholar
Thomas, T. H. (1972). The distribution of hormones in relation to apical dominance in Brussels sprouts (Brassica oleracea var. gemmifera L.) plants. Journal of Experimental Botany 23, 294–301.CrossRefGoogle Scholar
Verheij, E. W. M. (1970). Spacing experiments with Brussels sprouts grown for single-pick harvests. Netherlands Journal of Agricultural Science, Wageningen 18, 89–104.CrossRefGoogle Scholar
Watson, D. J. (1958). The dependence of net assimilation rate on leaf area index. Annals of Botany 22, 37–54.CrossRefGoogle Scholar