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Modelling broccoli development, yield and quality
Tan, Daniel K.Y., Birch, Colin J., Wearing, Alan H. and Rickert, Ken G. (2004). Modelling broccoli development, yield and quality. In: T. Fisher, Proceedings of the 4th International Crop Science Congress. New Directions for a Diverse Planet: 4th International Crop Science Congress, Brisbane, Australia, (). 26th September - 1st October, 2004.
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| Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials) |
| Name |
Description |
MIMEType |
Size |
Downloads |
Modelling_brocco.pdf
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Modelling_brocco.pdf |
application/pdf |
108.41KB |
460 |
| Author(s) |
Tan, Daniel K.Y.
Birch, Colin J.
Wearing, Alan H.
Rickert, Ken G.
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| Title of paper |
Modelling broccoli development, yield and quality
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| Conference name |
New Directions for a Diverse Planet: 4th International Crop Science Congress
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| Conference location |
Brisbane, Australia
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| Conference dates |
26th September - 1st October, 2004
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| Proceedings title |
Proceedings of the 4th International Crop Science Congress
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| Editor(s) |
T. Fisher
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| Publication date |
2004
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| Language |
eng
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| Abstract/Summary |
Broccoli is a vegetable crop of increasing importance in Australia, particularly in south-east Queensland and farmers need to maintain a regular supply of good quality broccoli to meet the expanding market. A predictive model of ontogeny, incorporating climatic data including frost risk, would enable farmers to predict harvest maturity date and select appropriate cultivar - sowing date combinations. To develop procedures for predicting ontogeny, yield and quality, field studies using three cultivars, 'Fiesta', 'Greenbelt' and 'Marathon', were sown on eight dates from 11 March to 22 May 1997, and grown under natural and extended (16 h) photoperiods at the University of Queensland, Gatton Campus. Cultivar, rather than the environment, mainly determined head quality attributes of head shape and branching angle. Yield and quality were not influenced by photoperiod. A better understanding of genotype and environmental interactions will help farmers optimise yield and quality, by matching cultivars with time of sowing. The estimated base and optimum temperature for broccoli development were 0 degrees C and 20 degrees C, respectively, and were consistent across cultivars, but thermal time requirements for phenological intervals were cultivar specific. Differences in thermal time requirement from floral initiation to harvest maturity between cultivars were small and of little importance, but differences in thermal time requirement from emergence to floral initiation were large. Sensitivity to photoperiod and solar radiation was low in the three cultivars used. This research has produced models to assist broccoli farmers in crop scheduling and cultivar selection in south-east Queensland.
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| Subjects |
300302 Plant Growth and Development
300205 Agronomy
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| Keyword(s) |
broccoli
development
yield
quality
temperature
model
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| Additional Notes |
Individual authors retain copyright in the papers published in HTML and PDF on CD and the Internet for the 4th International Crop Science Congress. The Regional Institute Ltd retains the non-exclusive right to publish the proceedings from the 4th International Crop Science Congress in electronic format in perpetuity.
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