The assessment of persistence and its application to the evaluation of early perennial ryegrass cultivars
作者:
M. S. CAMLIN,
R. H. STEWART,
期刊:
Grass and Forage Science
(WILEY Available online 1976)
卷期:
Volume 31,
issue 1
页码: 1-6
ISSN:0142-5242
年代: 1976
DOI:10.1111/j.1365-2494.1976.tb01107.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
AbstractBotanical analyses were carried out on the herbage from plots of twelve early cultivars of perennial ryegrass (Lolium perenne) cut in their fourth year and the results related to visual persistence assessments carried out on the cultivars at the end of the second and third harvest years. Persistence assessments were found to be highly and positively correlated with the yields of sown cultivars (r=+0.96***,r=+0.99***) and to be highly and negatively correlated with the yields of unsown herbage species (r =+0.98***, r =−094***). The plots of the less persistent cultivars were invaded by unsown grass species and docks which contributed in varying degrees to total DM yield, reducing the correlation of total yield with persistence. Assessments of botanical composition of swards made at the end of the second year provided reliable predictions of the relative persistence of the cultivars. The results of the investigations indicated that assessment of persistence, as well as yield potential, is fundamentally important in cultivar evaluatio
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