We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Development of Douglas-fir seedling root architecture in response to localized nutrient supply .
- Authors
Jacobs, Douglass F.; Rose, Robin; Haase, Diane L.
- Abstract
Reports that Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were transplanted into pots with controlled-release fertilizer (CRF). Seedlings that were destructively harvested periodically, and roots that were divided into vertical segments above (S1), within (S2), and below (S3) the fertilizer layer; Number of active root tips that was positively correlated with CRF rate in S1 and negatively correlated with rate in S2 and S3; Root penetration into S3 that was severely restricted; Detrimental changes in soil osmotic potential in S2; Fertilizer that improved seedling growth compared with controls but was inhibitory; Photochemical quantum yield that was higher in all CRF treatments compared with controls following transplant, which corresponded with rapid initial CRF nutrient release; High application rates that may result in excessive concentrations of fertilizer nutrients in media, which can restrict root penetration and negatively affect seedling growth; Conservative application rates and improvements in CRF technology that will help reduce the potential for adverse effects on seedling development.
- Subjects
DOUGLAS fir; SEEDLINGS; FERTILIZERS; SOILS
- Publication
Canadian Journal of Forest Research, 2003, Vol 33, Issue 1, p118
- ISSN
0045-5067
- Publication type
Article
- DOI
10.1139/x02-160