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A comparison of the establishment, productivity and feed quality of four cocksfoot (Dactylis glomerata L.) and four brome (Bromus spp.) cultivars, under leaf stage based defoliation management

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Turner, LR, Donaghy, DJ, Lane, PA and Rawnsley, RP 2007 , 'A comparison of the establishment, productivity and feed quality of four cocksfoot (Dactylis glomerata L.) and four brome (Bromus spp.) cultivars, under leaf stage based defoliation management' , Australian Journal of Agricultural Research, vol. 58, no. 5 , pp. 900-906 , doi: 10.1071/AR06252.

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Abstract

A glasshouse study was undertaken to investigate the differences in rate of establishment, productivity, feed
quality, and response to defoliation frequency between new and old cultivars within the brome (Bromus spp.) and cocksfoot
(Dactylis glomerata L.) genera. Three of the more recent brome (Bareno, Gala, and Exceltas) and cocksfoot (Tekapo,
Megatas, and Uplands) cultivars were compared with Matua and Kara, the most widely sown and utilised brome and
cocksfoot dairy pasture cultivars, respectively.
The improvements resulting from breeding and selection within the cocksfoot genera included faster seedling emergence
and tiller production during establishment, higher tiller density once established, lower acid detergent fibre (ADF), higher
crude protein (CP), and higher metabolisable energy (ME) concentrations. The newer cocksfoot cultivars had lower leaf
and tiller dry matter (DM) yields than Kara, with little variation in ME levels between cultivars.
The improvements resulting from breeding and selection within the brome genera, measured in this study, included
faster seedling emergence, lower ADF, and higher CP concentrations. The higher fibre levels for Matua did not translate
into a lower ME concentration; in fact, the energy content in Matua and Gala was higher than for all remaining cultivars.
There were further similarities between Matua and Gala, the high water-soluble carbohydrate levels, leaf, and tiller DM
yields of these cultivars, reflecting a strong regrowth response to defoliation.
Further research in the field is required to confirm the observed variation within and between cocksfoot and brome
cultivars, and to quantify the potential benefits of using the new v. the original cultivars.

Item Type: Article
Authors/Creators:Turner, LR and Donaghy, DJ and Lane, PA and Rawnsley, RP
Journal or Publication Title: Australian Journal of Agricultural Research
Publisher: CSIRO Publishing
ISSN: 0004-9409
DOI / ID Number: 10.1071/AR06252
Additional Information:

Copyright © 2007 CSIRO.

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