Full TGIF Record # 72036
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Web URL(s):http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2494.2000.00234.x/epdf
    Last checked: 10/02/2015
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Publication Type:
i
Refereed
Author(s):Garay, A. Hern√°ndez; Matthew, C.; Hodgson, J.
Author Affiliation:Plant Science Department, Massey University, Palmerston North, New Zealand
Title:The influence of defoliation height on dry-matter partitioning and CO2 exchange of perennial ryegrass miniature swards
Section:Research note
Other records with the "Research note" Section
Source:Grass and Forage Science. Vol. 55, No. 4, December 2000, p. 372-376.
# of Pages:5
Publishing Information:Oxford, Blackwell Scientific Publications
Keywords:TIC Keywords: Defoliation; Dry weight; Carbon dioxide exchange rate; Lolium perenne; Leaf appearance rate; Mowing height; Photosynthesis; Carbon dioxide; Root weight; Shoot density
Cultivar Names:Grasslands Nui
Abstract/Contents:"This study investigated the effects of defoliation intensity on the above- and below-ground plant mass, rates of CO2 exchange and leaf appearance rate of ryegrass miniature swards maintained at constant cutting height ranging from 20 mm to 160 mm for 5 months. Total plant mass, above-ground herbage mass and root mass increased as cutting height increased from 20 to 120 mm. Further increase in cutting height did not increase total plant mass or its components. Leaf appearance rate and photosynthesis per unit of leaf dry matter (DM) decreased as defoliation height increased from 20 to 160 mm. Gross and net CO2 uptake per unit soil surface area increased with cutting height to 120 mm. Further increase in cutting height to 160 mm decreased gross and net CO2 uptake and herbage harvested. A multivariate canonical discriminant analysis indicated different responses of root and shoot mass to cutting height and reduction in CO2 uptake rate at the 160 mm cutting height. The implications of those responses to defoliation management of forage plants are discussed."
Language:English
References:10
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Garay, A. H., C. Matthew, and J. Hodgson. 2000. The influence of defoliation height on dry-matter partitioning and CO2 exchange of perennial ryegrass miniature swards. Grass Forage Sci. 55(4):p. 372-376.
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Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2494.2000.00234.x/epdf
    Last checked: 10/02/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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