Premium
Nitrogen studies in Lolium perenne grown for seed III. The effect of nitrogen and water stress
Author(s) -
HEBBLETHWAITE P. D.,
McLAREN J. S.
Publication year - 1979
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.1365-2494.1979.tb01471.x
Subject(s) - agronomy , nitrogen , yield (engineering) , lolium perenne , straw , perennial plant , nitrogen fertilizer , fertilizer , irrigation , biology , chemistry , materials science , organic chemistry , metallurgy
The effects of water and nitrogen (N) availabilities and their possible interactions on the seed yield and yield components of S23 perennial ryegrass grown in pots in the glasshouse were investigated. Increasing the N fertilizer from 0 to 5 g per pot more than doubled the seed yield but no further increase in seed yield was found by increasing N fertilizer from 5 to 10 g per pot. The main effect of increasing water availability was to increase both seed and straw yield. When N had been applied, accumulated evapotranspiration was linearly related to seed and straw yield. The component of yield having the greatest effect on yield was the number of fertile tillers and, although both N and water availability affected this component, N had the larger effect. Implications of these responses are discussed in relation to the potential yield of the crop and to the field situation.