Work

Effects of different plant growth regulators on phenotypic variation and seed yield of Dactylis glomerata

Year: 2024

Type: article

Abstract: Plant growth regulators (PGRs) have been widely used in the production of forage seeds. In a two-year field experiment, different concentrations of CCC (500, 750, 1,000, 1,250 g·hm−2) and TE (100, 200, 300, 400 g·hm−2) were sprayed on Dactylis glomerata as well as a mixture of CCC and TE (500 + 50, 500 + 150, 1,000 + 50, 1,000 + 150 g·hm−2). By studying the effects of different PGRs and different concentrations on the characters and seed yield of Dactylis glomerata, it was found that the plant height was significantly reduced by spraying two plant growth regulators alone, and the stem diameter of increased by spraying a mixture of CCC and TE. Different PGRs had different effects on the functional leaves of Dactylis glomerata under different concentrations. Spraying of two PGRs in a certain range of concentrations could significantly improve the seed yield, but when the concentration was too high, the seed yield was reduced. The seed yield of Dactylis glomerata could be significantly increased by spraying a mixture of CCC and TE in the range of the test concentrations. Among them, spraying a mixture of CCC and TE at a concentration of 500 + 150 g·hm−2 had the best effect on increasing seed yield, which increased the average yield by 47.91% in two years. Additionally, the experiment also found that spraying PGRs mainly increased the yield of Dactylis glomerata by increasing the number of fertile tillers·m−2, spikes per fertile tillers, and seed setting rate.

Source: Grass Research

DOI: 10.48130/grares-0024-0021