Premium
The effect of nitrogen and length of primary growth period on yield of leaf and stem components of perennial ryegrass
Author(s) -
BARTHOLOMEW P. W.,
CHESTNUTT D. M. B.
Publication year - 1978
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.1365-2494.1978.tb00825.x
Subject(s) - perennial plant , tiller (botany) , nitrogen , yield (engineering) , agronomy , biology , main stem , stem and leaf display , lolium perenne , zoology , chemistry , materials science , organic chemistry , metallurgy
The influence of length of first growth period of the season and level of nitrogen application on yields of leaf and stem components of perennial ryegrass was estimated. Three primary growth periods of 21, 42 and 70 d were used in combination with nitrogen treatments allowing 0, 1.43, 2.86 and 429 kg N per ha per d of growth applied as a single dressing at the beginning of the growth period. Increases in level of nitrogen application and in growth time produced higher yields of both components, but particularly of stem. Mean leaf yield per tiller reached a maximum with a 42‐d growth period. Whilst the ratio of leaf: stem was altered markedly by longer growth periods it was apparently unaffected by nitrogen application.