Predicting nitrogen requirement in perennial ryegrass seed crops
DOI:
https://doi.org/10.33584/rps.14.2008.3190Abstract
Results from 17 nitrogen (N) rate response trials using current best management including the plant growth regulator trinexapac-ethyl (Moddus) were used to predict optimum applied N rates for perennial ryegrass. The average optimum applied N rate was 145 kg/ha. A simple model using late winter soil mineral N (0-30 cm) and a total N requirement (mineral N + applied N) of 185 kg N/ha is recommended for growers to predict the applied spring N rate. Keywords: nitrogen, optimum rate, Lolium perenne, seed yield
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