Utilising leaf number as an indicator for defoliation to restrict stem growth in rhodes grass (Chloris gayana) cv. Callide

Article

Pembleton, K.G., Lowe, K.F. and Bahnisch, L.M.. 2009. "Utilising leaf number as an indicator for defoliation to restrict stem growth in rhodes grass (Chloris gayana) cv. Callide." Tropical Grasslands. 43, pp. 79-85.
Article Title

Utilising leaf number as an indicator for defoliation to restrict stem growth in rhodes grass (Chloris gayana) cv. Callide

ERA Journal ID5172
Article CategoryArticle
AuthorsPembleton, K.G., Lowe, K.F. and Bahnisch, L.M.
Journal TitleTropical Grasslands
Journal Citation43, pp. 79-85
Number of Pages7
Year2009
Place of PublicationColombia
ISSN0049-4763
Web Address (URL)https://www.tropicalgrasslands.info/index.php/tgft/tropicalGrasslands
Abstract

A plot experiment examined the yield response of a nitrogen-fertilised rhodes grass (Chloris gayana) sward to defoliation using the production of a set number of leaves after the last defoliation as the indication for defoliation harvesting. Two factors, defoliation frequency and nitrogen fertiliser rate, were imposed on the rain-grown sward in south-east Queensland over 2 defoliation cycles. Defoliations occurred when an average of 2, 4, 6 and 8 leaves were produced on tillers, and the rates of nitrogen fertiliser were 150 and 300 kg/ha N.
Total and leaf yields of rhodes grass were unaffected by defoliation frequency (P > 0.05). Stem yield increased only once 4 leaves had been regrown; hence, leaf:stem ratio was highest at the 2- and 4-leaf defoliation intervals. This response was most pronounced when coupled with the higher rate of nitrogen fertiliser. The results suggest leaf number per tiller can be used as an indication of time to harvest rhodes grass pastures to limit the production of stem and increase the leaf:stem ratio. Further studies are required to examine this principle under grazing.

Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020300403. Agronomy
Byline AffiliationsUniversity of Queensland
Department of Primary Industries and Fisheries, Queensland
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Effect of defoliation management on expression of the ‘high sugar’ cultivar trait in Tasmania
Turner, Lydia R., Donaghy, Daniel J, Pembleton, Keith G. and Rawnsley, Richard P. 2013. "Effect of defoliation management on expression of the ‘high sugar’ cultivar trait in Tasmania." 22nd International Grassland Congress: Revitalising Grasslands to Sustain Our Communities. Sydney, Australia 15 - 19 Sep 2013 Australia.
Effect of nitrogen fertiliser applications on botanical composition
Turner, Lydia R., Donaghy, Daniel J., Pembleton, Keith G. and Rawnsley, Richard P.. 2013. "Effect of nitrogen fertiliser applications on botanical composition." 22nd International Grassland Congress: Revitalising Grasslands to Sustain Our Communities. Sydney, Australia 15 - 19 Sep 2013 Australia.
Impact of grazing on the silage yield of forage oat crops
Pembleton, Keith G., Harrison, Matthew T. and Rawnsley, Richard P.. 2013. "Impact of grazing on the silage yield of forage oat crops." 22nd International Grassland Congress: Revitalising Grasslands to Sustain Our Communities. Sydney, Australia 15 - 19 Sep 2013 Australia.
Early sowing and irrigating of rape crops in cool temperate environments boosts forage yield potential
Harrison, Matthew T., Pembleton, Keith G. and Rawnsley, Richard P.. 2013. "Early sowing and irrigating of rape crops in cool temperate environments boosts forage yield potential." 22nd International Grassland Congress: Revitalising Grasslands to Sustain Our Communities. Sydney, Australia 15 - 19 Sep 2013 Australia.
Frost risk associated with growing maize for silage on Tasmanian dairy farms
Pembleton, Keith. 2012. "Frost risk associated with growing maize for silage on Tasmanian dairy farms." Rawnsley RP (ed.) 16th Australian Agronomy Conference: Capturing Opportunities and Overcoming Obstacles in Australian Agronomy (ASA 2012). Armidale, Australia 14 - 18 Oct 2012 Armidale, Australia.
Partitioning of taproot constituents and crown bud development are affected by water deficit in regrowing alfalfa (Medicago sativa L.)
Pembleton, Keith G., Volenec, Jeffrey J., Rawnsley, Richard P. and Donaghy, Daniel J.. 2010. "Partitioning of taproot constituents and crown bud development are affected by water deficit in regrowing alfalfa (Medicago sativa L.)." Crop Science: a journal serving the international community of crop scientists. 50 (3), pp. 989-999. https://doi.org/10.2135/cropsci2009.03.0140
Yield, yield components and shoot morphology of four contrasting lucerne (Medicago sativa) cultivars grown in three cool temperate environments
Pembleton, K. G., Donaghy, D. J., Volenec, J. J., Smith, R. S. and Rawnsley, R. P.. 2010. "Yield, yield components and shoot morphology of four contrasting lucerne (Medicago sativa) cultivars grown in three cool temperate environments." Crop and Pasture Science. 61 (6), pp. 503-511. https://doi.org/10.1071/CP09351
Genotype by environment interactions of lucerne (Medicago sativa L.) in a cool temperate climate
Pembleton, K. G., Smith, R. S., Rawnsley, R. P., Donaghy, D. J. and Humphries, A. W.. 2010. "Genotype by environment interactions of lucerne (Medicago sativa L.) in a cool temperate climate." Crop and Pasture Science. 61 (6), pp. 493-502. https://doi.org/10.1071/CP09269
Effect of summer irrigation on seasonal changes in taproot reserves and the expression of winter dormancy/activity in four contrasting lucerne cultivars
Pembleton, K. G., Cunningham, S. M. and Volenec, J. J.. 2010. "Effect of summer irrigation on seasonal changes in taproot reserves and the expression of winter dormancy/activity in four contrasting lucerne cultivars." Crop and Pasture Science. 61 (11), pp. 873 - 884. https://doi.org/10.1071/CP10030
Water deficit alters canopy structure but not photosynthesis in regrowing alfalfa (Medicago sativa L.)
Pembleton, Keith, Rawnsley, Richard P., Donaghy, Daniel J. and Volenec, Jeffrey J.. 2009. "Water deficit alters canopy structure but not photosynthesis in regrowing alfalfa (Medicago sativa L.)." Crop Science: a journal serving the international community of crop scientists. 49 (2), pp. 722-731. https://doi.org/10.2135/cropsci2008.08.0456
Effect of defoliation interval and height on the growth and quality of Arachis pintoi cv. Amarillo
Sinclair, K., Lowe, K.F. and Pembleton, K.G.. 2007. "Effect of defoliation interval and height on the growth and quality of Arachis pintoi cv. Amarillo." Tropical Grasslands. 41 (4), pp. 260-268.
Potential of tropical forages for the Tasmanian dairy industry
Pembleton, Keith, Rawnsley, Richard, Donaghy, Danny and Chamberlain, Peter. 2006. "Potential of tropical forages for the Tasmanian dairy industry." 13th Australian Agronomy Conference 2006. Perth, Australia 10 - 14 Sep 2006 Australia. Australian Society of Agronomy.