RESPONSE OF PERENNIAL RYEGRASS TO SPRING NITROGEN FERTILITY AND PLANT GROWTH REGULATOR APPLICATIONS
Recently registered plant growth regulators (PGR) used for control of excessive growth and lodging in perennial ryegrass were applied in conjunction with varied rates of spring-applied nitrogen (N) in 2002 to determine if seed yield can be increased with higher than recommended spring N rates. Though seed yields were increased by 38% from the use of PGR, higher rate of spring N was not a contributing factor to the increased seed yield. Thus, the spring N rate for optimum seed production in perennial ryegrass is the same with or without the use of PGRs.