RECORD
Examining soil parent material influence over Douglas-fir stem growth response to fertilization: Taking advantage of information from spatiotemporally distributed experiments
- Title:
- Examining soil parent material influence over Douglas-fir stem growth response to fertilization: Taking advantage of information from spatiotemporally distributed experiments
- Creator:
- White, Kevin P.; Coleman, Mark; Page-Dumroese, Deborah S.; Gessler, Paul E.; Kimsey, Mark; Shaw, Terry
- Date Created:
- 2012
- Description:
- Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) in the Inland Northwest region of the USA are nitrogen (N) deficient; however stem growth responses to N fertilizers are unpredictable, which may be due to poor accounting of other limiting nutrients. Screening trial experiments, including potassium (K), sulfur (S), and boron (B) multiple nutrient treatments, have been conducted to learn about Douglas-fir nutritional status and fertilizer growth response. The data from the screening trial experiments were compiled to test whether the soil parent materials of the region could be used to predict nutritional status. Estimating effects of fertilizers and soil parent materials on Douglas-fir growth from compilations of such experiments, however, poses challenges and opportunity; experiments clustered in time and space introduce latent variables that drive between-site variation. We used a two-stage modeling approach to efficiently take advantage of the information in these data. First, we employed a mixed model approach to test the primary hypothesis of soil parent material influence upon stem growth response to fertilizer. As the second-stage to the analysis, the predicted random effects estimated from the mixed model were used as a response variable to test how strongly precipitation drives between-site variation. As expected, including the random site effect significantly improved the model fit of the growth model (K = 436.5, P < 0.0001). The full mixed model accounted for 85% of the variation in the growth data (R2 = 0.85) and revealed an interaction between fertilizer treatment and soil parent material class (P = 0.0179). Post hoc analysis suggested that Douglas-fir growing on loessal soils are not constrained by K, S, or B, but no general consistency was apparent with tephra or underlying geology. The second stage modeling suggested that winter precipitation explains variation in predicted random site effects (r2 = 0.23), and hence the growth difference, better than total precipitation. Also, the annual lag precipitation explains variation in predicted random effects comparably well (r2 = 0.22).
- Document Type:
- Research Article
- Subjects:
- screening trail experiments mixed models growth modes model selection Inland Northwest Precipitation
- Location:
- Inland Northwest Region of the USA
- Latitude:
- 46.869607
- Longitude:
- -116.733856
- Publisher:
- Kevin P. White, Mark Coleman, Deborah S. Page-Dumroese, Paul E. Gessler, Mark Kimsey, Terry Shaw, Examining soil parent material influence over Douglas-fir stem growth response to fertilization: Taking advantage of information from spatiotemporally distributed experiments, Forest Ecology and Management, Volume 286, 2012, Pages 101-107, ISSN 0378-1127, https://doi.org/10.1016/j.foreco.2012.08.043.
- Department:
- Department of Forest, Rangeland, and Fire Sciences, University of Idaho, United States; Department of Statistical Science, University of Idaho, United States; United States Department of Agriculture, Forest Service, Rocky Mountain Research Station, Moscow, Idaho, Untied States
- Type:
- Text
- Format:
- record
Source
- Preferred Citation:
- "Examining soil parent material influence over Douglas-fir stem growth response to fertilization: Taking advantage of information from spatiotemporally distributed experiments", UIEF Research Exchange, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/uief/items/uief_0332.html
Rights
- Rights:
- In copyright, educational use permitted.
- Standardized Rights:
- http://rightsstatements.org/vocab/InC-EDU/1.0/