Senescence and death of herbage during periods of re growth in rye grass and red clover and white clover and the effect of applied nitrogen

Wilman, D.; Martins, V.M.M.

Journal of Applied Ecology 14(2): 615-620

1977


ISSN/ISBN: 0021-8901
Accession: 006387639

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Abstract
Aboveground yield and the production of senescent and dead tissue were measured in perennial [Lolium perenne] and Italian [L. multiflorum] ryegrasses, white [Trifolium repens] and red [Trifolium [T. pratense] clover and in mixtures of these species during 2 regrowth periods in late summer/early autumn. During the first 3 wk of regorwth, applied N approximately doubled yield of ryegrass without increasing the production of senescent and dead tissue. During the later stages of regrowth, in ryegrass and white clover, production of new tissue was approximately counterbalanced by senscence and death. Red clover grew vigorously during late summer to produce a tall, high-yielding crop which contained a relatively low proportion of senescent and dead tissue. Losses due to decomposition and other causes were extremely low in red clover during this period. During early autumn the growth of red clover was similar to that of white clover.