Effects of plant growth regulators on growth characteristics of Lolium perenne

A pot experiment was conducted to determine the effects of different concentrations of four kinds of growth regulators on plant height, length and width of leaf, tillers, dry weight and fresh weight of perennial ryegrass (Lolium perenne). The results showed that the different concentration of four plant growth regulators were significantly inhibited the growth of plants. 200 mgL-1 of Paclobutrazol and 375 mgL-1 of Aibis treatments were suggested for chemical pruning of perennial ryegrass.