Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.09.071 |
Understanding spatial and temporal Douglas-fir fertilizer response in the Pacific Northwest using boosted regression trees and linear discriminant analysis | |
Littke, K. M.1; Cross, J.2; Harrison, R. B.1; Zabowski, D.1; Turnblom, E.1 | |
2017-12-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 406 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Fertilizer response of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) plantations can vary considerably throughout the Pacific Northwest due to differences in soil and site productivity. In this study, we calculated significant two-, four-, and six-year cumulative volume growth response per tree due to urea fertilization on 71 Douglas-fir installations using a paired t-test. To understand the biogeoclimatic factors affecting fertilizer response, climate, location, soil, and productivity predictor variables were used in boosted regression tree (BRT) and linear discriminant (LDA) analyses to produce models that could predict significant regional response to fertilization. The ability to predict significant volume response decreased with time since fertilization (71-37% from 2 to 6 years), yet installations that were predicted to respond in all years of BRT models had similar response to significantly responding installations (> 5000 cm(3)/yr). The most common predictors of volume response in both model types and all measurement periods were high elevation (> 400 m), low moderate site index (< 42 m at 50 years), and cold winter temperatures (< 4.4 C). The Oregon (OR) Klamath Mountain region contained the greatest coverage of predicted volume response. The Middle Cascade Mountains also had large areas predicted to respond, but in this study OR installations responded better than Washington (WA) installations. The Coast Range, Olympic Mountains, Puget Trough, and Northern Cascade Mountains were predicted to have very little response. This study demonstrates the spatial relationships between climate, soil, and productivity variables that indicate fertilization response across the coastal Pacific Northwest. |
英文关键词 | Douglas-fir Fertilizer response Boosted regression trees Linear discriminant analysis Climate Elevation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416395800008 |
WOS关键词 | NITROGEN-FERTILIZER ; GROWTH-RESPONSE ; BIOGEOCLIMATIC PROPERTIES ; SOIL PROPERTIES ; OREGON ; STANDS ; YOUNG ; REQUIREMENTS ; CALCIUM ; UREA |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22183 |
专题 | 气候变化 |
作者单位 | 1.Univ Washington, Sch Environm & Forest Sci, Box 352100, Seattle, WA 98195 USA; 2.Stand Management Cooperat, Box 352100, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Littke, K. M.,Cross, J.,Harrison, R. B.,et al. Understanding spatial and temporal Douglas-fir fertilizer response in the Pacific Northwest using boosted regression trees and linear discriminant analysis[J]. FOREST ECOLOGY AND MANAGEMENT,2017,406. |
APA | Littke, K. M.,Cross, J.,Harrison, R. B.,Zabowski, D.,&Turnblom, E..(2017).Understanding spatial and temporal Douglas-fir fertilizer response in the Pacific Northwest using boosted regression trees and linear discriminant analysis.FOREST ECOLOGY AND MANAGEMENT,406. |
MLA | Littke, K. M.,et al."Understanding spatial and temporal Douglas-fir fertilizer response in the Pacific Northwest using boosted regression trees and linear discriminant analysis".FOREST ECOLOGY AND MANAGEMENT 406(2017). |
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