Ponderosa and Lodgepole Pine Seedling Bud Burst Varies with Lift Date and Cultural Practices in Idaho Nursery

摘要

Bud break tests were conducted at Lucky Peak Nursery following six different lift dates from September to April. On the average, lodgepole pine seedlings consistently broke bud before ponderosa pine seedlings. For both species, bud break began sooner, accelerated faster, and was more complete with each successive lift. Fertilizer treatments did not affect time to bud break. Seedling moisture regime and soil texture, however, affected bud break differently for the two species. Daily temperatures and bud burst data were used to determine optimum lifting times.