Use of plant growth regulators in forage seed production

High-quality forage seeds are the foundation of good pastures for the livestock husbandry industry. The advent of plant growth regulators (PGRs) has created new methods for increasing seed production in grasses and legumes. Based on their effects, PGRs can be divided into two types: plant growth stimulators and plant growth inhibitors. Plant growth inhibitors have been widely used in forage seed production. This research detailed progress in the use and mechanism of PGRs for forage seed production. In particular, it illuminated the effect of PGRs on seed yield and seed yield components. Existing problems and developmental trends were also summarized to provide necessary information to improve future research.