The effect of sowing depth and mulch on germination
The effect of three sowing depths (surface, 1/4 inch, and 1/2 inch) and four mulches (sand, hydromulch, fresh alder sawdust, composted alder sawdust) on germination and 1+0 growth of Douglas-fir 252-1.0 seedlings was evaluated at International Paper Company's Western Forest Research Center near Lebanon, Oregon. Germination percent, 1+0 seedling bed density, and 1+0 diameter were best for seed sown at 1/4 inch soil depth. 1+0 seedling shoot height and oven-dry shoot weight were best for seed sown on the surface or at 1/4 inch depth. The poorest performance resulted from seed sown at 1/2 inch soil depth. Germination rate was not affected by sowing depth. Mulching with alder sawdust modified soil temperatures in the seed zone which significantly increased seed germination and 1+0 shoot development relative to other mulches tested. Seed covered with hydromulch experienced colder soil temperatures producing the poorest germination rate and percent.
Download this file:
Download this file
—
PDF document,
621Kb
Details
Author(s): Ralph D. Guariglia, Barbara E. Thompson
Publication: National Nursery Proceedings - 1984
Event:
Western Forest Nursery Council-Intermountain Nurseryman's Association
1984 - Coeur d"Alene, ID
