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Competition in perennial ryegrass–white clover mixtures under cutting. 2. Leaf characteristics, light interception and dry-matter production during regrowth by Nassiri; Elgersma is a Agricultural and Biological Sciences article available to read on EtoBox.

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The effect of defoliation interval on growth patterns of contrasting perennial ryegrass (__Lolium perenne__)–white clover (__Trifolium repens__) mixtures was studied. The dynamics of increase in leaf area, light interception and dry‐matter (DM) production were measured within successive regrowth periods. No N fertilizer was applied. During 1995 six mixtures were cut eight (F1) or six times (F2) at a stubble height of 5 cm. The stubble composition was stable throughout the growing season: after harvest about 50 g DM m^−2^ (with a white clover proportion of 0·52) was present with a leaf area index (LAI) of 0·5 (0·38 white clover). The percentage of intercepted radiation after cutting was 20–30% and increased during 3 weeks to about 95%. The relative growth rate of leaf area and DM was higher for white clover than for perennial ryegrass, with the proportion of clover in the LAI and DM increasing during each regrowth period. Mixtures with large‐leaved white clover cv. Alice had a lower initial clover content after harvest, but a more rapid increase in clover LAI and DM than mixtures with the smaller leaved cvs Gwenda or Retor. Alice had the highest total and clover LAI and DM at harves

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Author

Nassiri; Elgersma

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0142-5242)

Published

1998

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)