Providing evidence to improve practice

Individual study: A comparison of herbicide and mulch mat treatments for reducing grass, herb, and shrub competition in the BC interior Douglas-fir zone—ten-year results

Published source details

Harper G., Comeau P. & Biring B. (2005) A comparison of herbicide and mulch mat treatments for reducing grass, herb, and shrub competition in the BC interior Douglas-fir zone—ten-year results. Western Journal of Applied Forestry, 20, 167-176


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Cover the ground with plastic mats after restoration planting Forest Conservation

A replicated study in 1993-1999 in boreal forest in British Colombia, Canada (1) found that plastic mulch mats decreased the total cover of herbaceous species and grasses in the first three years after treatment, but cover was similar to control plots 5-7 years after treatment. The total cover of grasses and herbaceous species was lower in plots with mulch mats (39-33%) than in control plots (71-68%) in the first three years, but similar 5-7 years after treatment (mulch: 70-90%; control: 80%). Herbaceous species and grasses were monitored in four 12 × 12 m plots of each treatment: control and covered with 90 × 90 cm plastic mulch mats. The study site had been planted with Douglas-fir Pseudotsuga menziesii in 1993.