The effects of time of application of nitrogen on seed yield, efficiency of N fertilizer use and apparent N fertilizer recovery of Russian wildrye Psathyrostachys juncea (Fisch .)Nevski

摘要

Availability of nitrogen (N) is considered to be a major determinant of grass seed yield.Nitrogen fertilizer application rate and the timing of its application are the two major concerns of research on the fertilizer‐N requirement of grass seed crops.No information is available regarding the effects of split‐nitrogen application on Russian Wildrye [ Psathy rostachys j uncea ( Fisch.)Nevski]seed production.Our objective was to determine the effect of rate and timing of N fertilizer application on Russian Wildrye seed yield and on the efficiency of nitrogen input.