Estimating understory vegetation response to multi-nutrient fertilization in Douglas-fir and ponderosa pine stands |
| |
| Authors: | Curtis L VanderSchaaf |
| |
| Institution: | (1) Arkansas Forest Resources Center, University of Arkansas at Monticello, Monticello, AR 71656, USA |
| |
| Abstract: | Models were developed to predict understory vegetation response to multi-nutrient fertilization at six conifer-forested stands
in the inland Northwest United States. Equations are presented to estimate how fertilization as well as other factors impacting
understory production in the inland Northwest change total understory vegetation production and the production of three individual
lifeforms (shrubs, forbs, and grasses and grass-likes). Overstory stand density was found to have the greatest impact on understory
production, and regardless of factors such as fertilization or precipitation, large stand densities will limit understory
production. At lower stand densities, multi-nutrient fertilization as well as greater amounts of precipitation will increase
understory production. These factors were also found to be synergistic; thus, greater amounts of precipitation increase the
effects of multi-nutrient fertilization on understory production. For sites of the same stand density, Douglas-fir Pseudotsuga menziesii (Mirb.) Franco] was shown to have a greater negative impact on understory production than ponderosa pine (Pinus ponderosa Dougl. ex Laws.). The models predict that multi-nutrient fertilization of ponderosa pine stands will produce increases in
understory production across a broader range of stand densities. |
| |
| Keywords: | Conifer Inland Empire Inland Northwest Stand density |
| 本文献已被 SpringerLink 等数据库收录！ |
|
