by U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station in [Ogden, Utah] .
Written in English
|Series||Research note INT -- 315|
|Contributions||Intermountain Forest and Range Experiment Station (Ogden, Utah)|
|The Physical Object|
|Pagination||4 p. ;|
PDF ( K) PDF-Plus ( K) Citing articles; Seed-cone differentiation and sexual reproduction in western white pine (Pinus monticola)John N. Owens and, Marje MolderCited by: Western white pine (Pinus monticola Dougl.) was once a much larger component of forests in the Pacific Northwest than it is today. Historically and ecologically, western white pine has been considered important in the Pacific North-west, yet information on its status is limited (Goheen ). In areas of Idaho and the Inland Empire, the white pine. Barnes, Burton V. Effects of thinning and fertilizing on production of western white pine seed. USDA Forest Service, Research Paper INT Intermountain Forest and Range Experiment Station, Ogden, UT. 14 p. Bingham, R. T., and G. E. Rehfeldt. Cone and seed yields in young western white . Seed-cone production on grafts of eastern white pine in breeding orchards occurs irregularly and is usually small. This hinders the completion of crosses and acquisition of desirable seed. Gibberellin A4/7 (GA,/7) has been effective in promoting pollen- and seed-cone production by foliar spraying in eastern white pine (Ho and Schnekenburger, ).
In this study, observations and measurements were made on five grafts for each of 30 clones in three successive years (, and ) on Scots pine (Pinus sylvestris) seed orchard. Over 18 years, western white pine from 25 to 70 years old in the Inland Empire produced from 2 seeds to more than seeds per cone, with a mean production of Western white pines can begin cone production as early as age 7 and become more prolific with age. 1. Gather white pine seeds in late summer after the long, curving cones dry out and the scales begin to lift. Place the cones in a paper bag. Set the bag in a warm, dry spot outdoors for one week. Western White Pines are very popular for bonsai because of their short needles and dense branching habit, especially because trees develop a thick trunk quickly. When growing Pinus monticola in containers be sure to use a very well drained mix, we have had good success with 75% coarse bark, 15% pumice or perlite, and 10% compost with a spoonful.
The optimal time for control pollinations was at cone stages 4 and 5 and optimal amount of pollen per pollination bag was – mL. Western white pine is a very good seed producer and can be easily managed in seed orchards to give very high seed production per cone and per tree. Western white pine has always been a 6 Western white pine is also used for softwood furniture, much of it colonial period reproductions. About one-third of the annual production goes to cut-up plants for remanufacture. Some com mon grade lumber is used in the fabri - cation of laminated roof decking. Plywood, too, is made from western white pine. Count all sound filled seed on one face of the cut cone. Filled seed have white centers (endosperm). Aborted seed are darkened or shriveled. Look for insect activity inside the cone and seed (Figure 1). If more than half of the cones sampled have insect damage, subtract one sound cut seed from the count on each damaged cone. Insect damaged. Pine trees have evolved special structures, the pine cone, as a central means of reproduction. The pine cone is key to successful fertilization of seeds and assists plays an important role in dispersing seeds over a wide area. A single pine tree ordinarily contains both male and female pine cones.