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Group Title: Research Report - University of Florida Institute of Food and Agricultural Sciences ; 87-07
Title: Evaluation of cultural practices, varieties, spacing, and fertilization in relation to broccoli yields
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Permanent Link: http://ufdc.ufl.edu/UF00075866/00001
 Material Information
Title: Evaluation of cultural practices, varieties, spacing, and fertilization in relation to broccoli yields
Series Title: Research Report - University of Florida Institute of Food and Agricultural Sciences ; 87-07
Physical Description: Book
Language: English
Creator: White, J. M.
Hancik, Ivalou
Llewellyn, W. R.
Publisher: University of Florida, Institute of Food & Agricultural Sciences, Central Florida Research & Education Center
Publication Date: 1987
 Record Information
Bibliographic ID: UF00075866
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 122940489

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HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida




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Central Florida Research & Education Center T
University of Florida O
Institute of Food & Agricultural Sciences
Sanford, FL 32771 Un;verslty (

Research Report SAN 87-07 January 1987

EVALUATION OF CULTURAL PRACTICES, VARIETIES, SPACING, AND
FERTILIZATION IN RELATION TO BROCCOLI YIELDS

J. M. White, Ivalou Hancik, and W. R. Llewellyn


The effect of four parameters on broccoli growth and field
performance were evaluated during the 1986 growing season in central
Florida. The parameters were: soil cover/configuration, variety, plant
spacing, and fertilization. Plots were configured in one of three ways,
raised beds (3-4" high), flat plots, and plastic-covered raised beds.
Three varieties, XPH852, XPH5004, and Galaxy were included in this
study. Plant spacings of 3, 6, and 12 inches were evaluated. Two
levels of fertilization, 150 and 225 lb/acre of nitrogen (N) were
applied.

The broccoli seedbed was planted on February 7, 1986, in Sanford,
Florida, on Myakka fine sand. The area had previously been treated with
0.25 lb a.i./acre of Ridomil and 2 qt/acre of Vegedex. Plants were
transplanted to 5' x 25' plots on March 13; all plots had received a
broadcast application of 750 lb/acre 5-5-8. Additional band and
sidedress applications of 5-5-8 were made to achieve the desired 150 and
225 Ib/acre levels of N. All treatments were replicated four times;
experimental results represent the average of the four replications.
The first harvest was on April 21, 1986, and the final (eighth) harvest
occurred on June 4.

Results of this study indicate that the use of plastic mulch
hindered broccoli head development as evidenced by lower total
marketable weight of harvestable produce and lower average weight per
head of broccoli grown with a plastic ground cover (Table 1). Planting
broccoli on beds did not appear to increase yields above those obtained
from plants grown on flat plots.

Although plants grown with a plastic mulch produced fewer, smaller
heads than those grown on beds or flat plots, head development under
plastic was faster than on beds or flat plots. At the first harvest, 23
plots contained harvestable produce; 12 plots (52%) were plastic-covered
plots, nine plots (39%) were beds, and two plots (9%) were flat. At the
second harvest, 57% of the harvestable plots were under plastic, 21% on
beds, and 21% on flat plots.

In general, XPH852 did not perform as well as XPH5004 and Galaxy,
especially at the 3-inch spacing (Table 2).











A 3-inch plant spacing encouraged the development of a greater
number of broccoli heads per plot than the 12-inch plant spacing;
however, total marketable weight per plot was comparable. Close plant
spacing encouraged the production of numerous, small heads, whereas
wider plant spacing favored the formation of fewer, larger heads (Table
3).

When plant spacing, variety, and bed cover/configuation were held
constant, addition of 225 lb/acre of N increased the total marketable
weight of broccoli per plot and the average weight per head over those
yields obtained in plots where 150 lb/acre of nitrogen were applied
(Table 3).

It is evident that each factor previously discussed modifies
broccoli yields to some extent. Therefore, it is especially important
to identify the goals of the individual grower, i.e., earliness, head
size, etc., and select the cultural practices, variety, fertilization
schedule, and plant spacing to meet these goals.




S






Table 1. The effect of soil cover/configuration on broccoli, cv. Galaxy, yields, Sanford, FL 1986.


W


3" spacing a 6" spacing 12" spacing
Total marketable Avg. wt. Total marketable Avg. wt. Total marketable Avg. wt.
Treatment per plot (Ib) per head (lb) per plot (Ib) per head (lb) per plot (lb) per head (lb)

Plastic covered bed

low fertility 7.17 0.17 9.47 0.24 5.57 0.34
high fertility 9.42 0.21 8.92 0.27 7.82 0.41
3-4" Raised bed

low fertility 13.40 0.23 11.90 0.31 9.12 0.44
high fertility 15.60 0.29 14.50 0.37 11.00 0.49

Flat bed
low fertility 12.67 0.22 12.17 0.31 10.97 0.46
high fertility 14.75 0.25 14.47 0.34 11.17 0.51

low fertility = 150 Ib/acre N; high fertility = 225 lb/acre N.












Table 2. The effect of variety on broccoli yields, Sanford, FL 1986.


XPH852 XPH5004 Galaxy
Total marketable Avg. wt. Total marketable Avg. wt. Total marketable Avg. wt.
Treatment per plot (lb) per head (lb) per plot (lb) per head (lb) per plot (Ib) per head (Ib)

-------------------------------------------- spaing---------------------------
Plastic-covered beds

low fertility 5.05 0.19 8.20 0.18 7.17 0.17
high fertility 5.10 0.21 7.95 0.19 9.42 0.21

Raised beds

low fertility 5.72 0.24 11.12 0.22 13.40 0.23
high fertility 7.27 0.24 14.65 0.25 15.60 0.29

Flat beds

low fertility 7.37 o0.24 12.27 0.20 12.67 0.22
high fertility 6.97 0.23 14.00 0.22 14.75 0.25


1low fertility = 150 Ib/acre N; high fertility = 225 lb/aore N.















Table 3. The effect of plant spacing on broccoli yields, Sanford, FL 1986.


Spacing Total marketable Total marketable Avg. wt./
Treatment (in) No./plot wt./plot (lb) head (lb)


Plastic-covered bed

low fertility1 3 42.00 7.17 0.17
low fertility 12 16.25 5.57 0.34

high fertility 3 44.50 9.42 0.21
high fertility 12 19.00 7.82 0.41

Raised bed

low fertility 3 56.75 13.40 0.23
low fertility 12 20.75 9.12 0.44

igh fertility 3 52.75 15.60 0.29
igh fertility 12 22.00 11.00 0.49

Flat bed

low fertility 3 56.00 12.67 0.22
low fertility 12 23.50 10.97 0.46

high fertility 3 58.75 14.75 0.25
high fertility 12 21.75 11.17 0.51


150 lb/acre N; high fertility = 225 Ib/acre N.


1low fertility =




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