Nitrogen Fertilizer Effects on the Duration of the Pre-anthesis Period and Spikelet Number per Spike in Barley

Autor:	G. C. Kernich, Gerald M. Halloran
Rok vydání:	1996
Předmět:	chemistry.chemical_element Plant Science Biology Nitrogen Nitrogen fertilizer Agronomy chemistry Anthesis Yield (wine) Grain yield Poaceae Hordeum vulgare Cultivar Agronomy and Crop Science
Zdroj:	Journal of Agronomy and Crop Science. 177:289-293
ISSN:	1439-037X 0931-2250
DOI:	10.1111/j.1439-037x.1996.tb00248.x
Popis:	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 field 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 . Yield increase was largely associated with an increase in the number of tillers per plant.
Databáze:	OpenAIRE
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