In the management of the lawn, in order to save on the cost of cutting grass, in addition to the use of mechanical cutting grass, plant growth regulators can also be used to control the growth of the lawn. For example, using a variety of plant growth regulators, such as paclobutrazol, on lawns can reduce the gap between cells in turfgrass plants, reduce the internodes, increase the thickness of the leaves, and darken the color, thereby inhibiting their growth. How can it be reasonable? Use paclobutrazol?
Paclobutrazol, also known as PP333, is a chemical that retards the growth of plants as a light brown powder. It is used for turfgrass chemical control and has many advantages. After application of paclobutrazol, the drought tolerance of turfgrass increased, the soluble sugar content in stem and leaf increased, the leaf transpiration decreased, and the turfgrass water consumption decreased by about 25%. After treatment with paclobutrazol, the degradation rate of chlorophyll and protein of Phytophthora fragrans was slowed down, and the protective enzyme system in the body was changed, which could delay the senescence of the lawn and extend the turf ornamental green period.
Usage of paclobutrazol. Generally used in the fast growing period of the lawn, with paclobutrazol formulated into a concentration of 200 to 300PPM liquid, spray quickly and evenly with the sprayer on the surface of the turfgrass, the concentration of the drug should not be too large, so as not to inhibit the role of Strong. Spraying is usually done within 2 to 3 days after pruning. It has been observed that the effect can be displayed 7 to 10 days after spraying, the appearance of the lawn is dark green, the viewing effect is excellent, and the holding time is long.
The number of tillers per unit area of ​​mixed turf increased rapidly after spraying, which was about 15% higher than that of untreated paclobutrazol. Therefore, the turf coverage rate can be rapidly increased to allow it to quickly become a flat. In addition, the mixed planted bluegrass turfgrass after spraying paclobutrazol was reduced in plant height by half compared to the unplanted turfgrass, which can greatly reduce the number of lawn pruning.
In addition, there are four points worth noting. First, after the spraying of paclobutrazol, the green color of the turfgrass is dark green. This is an appearance phenomenon after application. Some people mistakenly believe that no fertilizer is needed. In fact, fertilizer should be applied during the fertilization to promote the growth of turfgrass. Second, when the concentration is too high and the inhibition is too strong, 1 mg to 2 mg of gibberellic acid can be used to dilute 1 kg of water. Spraying twice can relieve symptoms of excessive suppression and restore normal growth. Third, paclobutrazol can be used in combination with chemical pesticides, which can significantly improve its use effects. For example, the combination of paclobutrazol and rare earth can significantly improve the turf's fertility. The fourth is combined with mechanical trimming. Although the use of paclobutrazol is more labor-saving, time-saving and labor-saving than mechanical pruning, it is difficult to completely replace mechanical pruning. In addition, mechanical pruning can overcome the disadvantages of poor turf uniformity caused by pruning.
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