PLANTING CHECK IN SPRUCE

Abstract

The report contains a review of literature pertaining to planting check of white spruce, defined as a period of prolonged reduced top growth which occurs after planting. From laboratory expzriments with 2-0 white spruce in glass pots, con- firmation of the damage and loss of part of the root system is presented. The pattern of loss and regrowth on wet soils is described. Suggestions to avoid check are offered, although practical application is difficult. The length of check is also discussed and frost is added to the list of factors which have been found to be concerned. Site preparation before planting is considered extremely important. All considerations indicate the importance of proper site selection and preparation in planting this species. In view of the economic loss during the period of check, consideration should be given to drainage, size of stock, and reduction of competition. The basic cause of the necrosis of the roots has not yet been assessed in terms of the proportions due to desiccation, exposure to light, temperature change, or physical damage.