Effect of Soil and Vegetation on Growth of Planted White Spruce

摘要

White spruce (Picea glauca) early survival, and especially growth, are reduced by excessive vegetative competition, so some weed control is beneficial. Herbicides are thought to provide the best vegetation control. Glyphosate--N-(phosphonomethyl) glycine--is a broad spectrum foliar active herbicide used both for site preparation and conifer release. Some research, however, showed that white spruce planted on sites prepared with glyphosate grew in height no more than untreated checks but suggested that diameter growth and survival might be increased.