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A correction for the influence of changes in lamina weight per unit length in grasses on measurements of the weight of lamina removed by grazing
Author(s) -
Tallowin J. R. B.,
TCACENCO F.,
PATEFIELD M.,
BROOKMAN S. K. E.
Publication year - 1989
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1989.tb01928.x
Subject(s) - lamina , biology , holcus lanatus , botany , zoology , poaceae , lolium perenne
Changes in the weight per unit length along the first and second fully‐expanded laminae of Lolium perenne, Agrostis stolonifera, Holcus lanatus and Poa trivialis were experienced in tillers harvested in April and June 1987 from a permanent pasture under contrasting nitrogen treatments. Schematic models representing the weight distribution along the laminae of the different species are presented. From these models, predictions of the weight of any given proportion of the lamina length have been calculated. The weight of segments of lamina have been estimated, using the appropriate lamina model for a species, and these estimates provided consistently greater precision than estimates of lamina weight when no correction for lamina shape was considered, the length of a segment of lamina simply being multiplied by the mean overall weight per unit length of the lamina.