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Nitrogen Fertilizer Effects on the Duration of the Pre‐anthesis Period and Spikelet Number per Spike in Barley
Author(s) -
KERNICH G. C.,
HALLORAN G. M.
Publication year - 1996
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1996.tb00248.x
Subject(s) - anthesis , nitrogen , agronomy , cultivar , hordeum vulgare , zoology , biology , nitrogen fertilizer , grain yield , yield (engineering) , poaceae , fertilizer , chemistry , materials science , organic chemistry , metallurgy
The effects of increased yield and grain number per unit area in barley in response to nitrogen application are well known. However, the influence of applied nitrogen on the rates and durations of developmental phases in barley are less well understood. Our objective was to investigate the effect of applied nitrogen on the duration of pre‐anthesis development in barley and the number of spikelets per spike in two barley cultivars, Franklin and Schooner, in two studies. We found no effect of nitrogen on the duration of the pre‐anthesis period in Schooner, when applied to pots at a rate of 0 or 55 kg N ha ‐1 , or when applied in the held at 0, 40 or 160 kg N ha ‐1 . However, this duration was extended in Franklin in the first study by an application of 55 kg N ha ‐1 . Both plant biomass and grain yield at maturity were increased between 0 and 55 kg N ha ‐1 , and 0 and 160 kg N ha ‐1 . Meld increase was largely associated with an increase in the number of tillers per plant.