气候变化领域集成服务门户(CCPortal): Comparative effects of soil resource availability on physiology and growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings

CCPortal

DOI	10.1016/j.foreco.2019.117580
	Comparative effects of soil resource availability on physiology and growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings
	Carter D.R.; Slesak R.A.; Harrington T.B.; D'Amato A.W.
发表日期	2019
ISSN	0378-1127
卷号	453
英文摘要	Scotch broom (Cytisus scoparius (L.) Link) is an invasive, N-fixing shrub in recently harvested Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) forests in the Pacific Northwest. The ability of Scotch broom to dominate a site and displace Douglas-fir in this region may be mediated by site quality and site resource supply. Individual seedlings of Scotch broom (n = 46) and Douglas-fir (n = 46) were planted in a controlled nursery setting and monitored over two years to test the effects of irrigation and fertilization treatments on the physiology and growth of these oft-conflicting species. Overall, Scotch broom remained largely unaffected by resource availability relative to Douglas-fir, which was more sensitive to water and nutrient availability. Scotch broom consistently showed greater assimilation and transpiration rates and plant water potentials than Douglas-fir under all treatments – indicating an elevated ability to acquire soil water resources. The conservative ecology of Douglas-fir resulted in greater water-use efficiency than Scotch broom throughout the experiment, however. Similarly, Douglas-fir crown and height growth started later in the growing season and ended earlier than that of Scotch broom, indicating a longer growing season for Scotch broom but also the importance of resource availability early in the growing season for Douglas-fir given its determinate growth. While Douglas-fir growth reflected the additive effects of increased resource availability, it did not surpass the growth of Scotch broom, which maintained steady growth and biomass accrual under all treatment conditions. The height of Douglas-fir growing under optimized conditions was approximately 40 cm less than that of Scotch broom regardless of treatment regime by the end of the two-year study. This demonstrates how critical early intervention is for land managers in order to control this invasive to avoid Scotch broom overtopping Douglas-fir seedlings during stand establishment. © 2019
英文关键词	Biomass; Carbon assimilation; Soil water; Transpiration; Water-use efficiency
语种	英语
scopus关键词	Biomass; Efficiency; Forestry; Irrigation; Physiology; Seed; Soil moisture; Transpiration; Water resources; Carbon assimilation; Nutrient availability; Plant water potential; Pseudotsuga menziesii; Resource availability; Soil water; Soil water resources; Water use efficiency; Ecology; biomass; carbon fixation; coniferous forest; ecophysiology; evapotranspiration; fertilizer application; growing season; irrigation system; overtopping; seedling emergence; shrub; soil water; water use efficiency; Biomass; Efficiency; Forestry; Irrigation; Moisture Content; Physiology; Soil; Pacific Northwest; Cytisus scoparius; Pseudotsuga; Pseudotsuga menziesii
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155747
作者单位	Department of Forest Resources and Environmental Conservation, Virginia Polytechnic Institute and State University, 228G Cheatham Hall, Blacksburg, VA 24060, United States; Department of Forest Resources, University of Minnesota, 1530 Cleveland Ave N., St. Paul, MN 55108, United States; USDA Forest Service, Pacific Northwest Research Station, 3625 93rd Avenue Southwest, Olympia, WA 98512, United States; Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT 05405, United States
推荐引用方式 GB/T 7714	Carter D.R.,Slesak R.A.,Harrington T.B.,et al. Comparative effects of soil resource availability on physiology and growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings[J],2019,453.
APA	Carter D.R.,Slesak R.A.,Harrington T.B.,&D'Amato A.W..(2019).Comparative effects of soil resource availability on physiology and growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings.Forest Ecology and Management,453.
MLA	Carter D.R.,et al."Comparative effects of soil resource availability on physiology and growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings".Forest Ecology and Management 453(2019).