Nitrogen fertilization response of cedar and hemlock plantations in coastal British Columbia

对不列颠哥伦比亚省沿海的西部红柏和西部铁杉种植园的林分水平的施肥反应进行了量化。然而，在不列颠哥伦比亚省沿海地区，常规应用的生长和产量模型在树木水平上操作，对树木水平对施肥处理的反应的了解有限。随着对碳固定和储存的肥料反应的重新关注，不列颠哥伦比亚省的森工面临着更好地了解树木对施肥处理的反应，以完善其森林施肥应用的挑战。该项目将利用不列颠哥伦比亚省北温哥华岛盐杉铁杉综合研究计划长期森林栽培试验30年的重新测量数据，量化西部铁杉和西部红柏三种种植密度(500、1500、2055株/公顷)对氮肥的树级反应。本项目的分析将为建立沿海BC区的TASS施肥模块奠定基础。最终，这项工作将使不列颠哥伦比亚省森工企业能够改进他们的施肥管理应用程序，以进一步增加他们的木材产量，并改进他们的碳固存战略。然后，建议的方法可以适用于不列颠哥伦比亚省和整个加拿大的其他树种和森林类型。

Fertilization responses at the stand-level have been quantified for western redcedar and western hemlockplantations in coastal British Columbia (BC). However, the routinely applied growth and yield models operateat the tree-level and understanding of tree-level responses to fertilization treatments in coastal BC is limited.With a renewed interest in fertilization responses for carbon sequestration and storage, forest industry in BCfaces the challenge to better understand tree-level responses to fertilization treatments in order to refine theirforest fertilization applications. This project will use 30 years of re-measurement data from long-termsilvicultural trials in the Salal Cedar Hemlock Integrated Research Program from Northern Vancouver Island,BC, to quantify the tree-level responses to nitrogen fertilization for both western hemlock and western redcedarin three planting densities (500, 1500, 2055 stems/ha). The analysis performed in this project will lay thegroundwork for building a TASS fertilization module for coastal BC. Ultimately, the work will allow BC forestindustry to refine their fertilization management applications to further increase their timber production andimprove their carbon sequestration strategies. The proposed approach can then be adapted to other tree speciesand forest types in BC and across Canada.