Estimating Pollen Yield From Western White Pine: Preliminary Studies
Two preliminary studies were conducted to develop a method for quantifying the number of pollen cones and pollen yield by western white pine (Pinus monticola D. Don). In study 1, pollen-bearing shoots from 10 trees in a single stand were sampled to obtain shoot attributes and determine pollen cones per shoot. "Pollen zone" (PZ), the length of shoot occupied by pollen cones, was the most useful feature to predict the number of pollen cones per shoot (CONES). The regression of pollen cones on PZ differed among trees, indicating the need for separate data per clone for very accurate estimates. In study 2, pollen volume per cone collected from two more trees averaged 0.22 cm3; an average shoot bore 22.4 cones and produced 4.9 cm3 of pollen. Procedures for estimating the pollen crop and for collecting a specified volume are offered. Tree Planters' Notes 46(2):64-69; 1995.
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Author(s): M. D. Meagher
Publication: Tree Planters' Notes - Volumes 46, Number 2 (1995)
Section: Peer Reviewed and Refereed Articles
Volume: 46
Number: 2
