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狗牙根拔节前后喷施矮壮素和多效唑，可明显抑制主茎和分蘖茎的伸长，缩短节间长，解除了植株的顶端优势，显著地促进了分蘖的大量发生，但对根系的生长也产生一定的抑制作用。此外，施用多效唑和矮壮素还增加了茎粗，叶片变短而宽，提高了狗牙根草坪的质量。多效唑在增加茎粗，促进分蘖的大量发生，抑制根系生长，减少干物质积累等方面的抑促作用大于矮壮素。矮壮素以３０００ｍｇ／ｋｇ或多效唑４００ｍｇ／ｋｇ是适宜的喷施浓度，在此浓度下对狗牙根产生明显的矮化效应，可用来替代人工修剪。
The spraying of CC and PP333 before and after the caterpillar roots could significantly inhibit the elongation of the stem and tiller stems and shorten the internode length, relieved the apical dominance of the plants and significantly promoted the occurrence of tillering, but the root growth Also have some inhibitory effect. In addition, the application of paclobutrazol and chlormequat also increased stem diameter, shorter and wider leaves, and improved the quality of bermudagrass. Paclobutrazol was more effective than CCC in increasing stem diameter, promoting tillering, restraining root growth and reducing dry matter accumulation. Chlormequat at 3000mg / kg or paclobutrazol 400mg / kg is the appropriate spraying concentration, at this concentration of bermudagrass obvious dwarf effect, can be used to replace artificial trimming.