ABSTRACT Identification of stocktype attributes that speed up field establishment has potential to reduce rotation time of Christmas tree productions. Such morphological and physiological attributes can be targeted in the nursery production. This study tested the effects of container type and nursery seedling density on stocktype attributes at planting and the effects of these on field performance over two years in Abies lasiocarpa and A. nordmanniana Christmas tree stock. Nursery conditions had a considerable impact on seedling attributes at planting. Although sets of these correlated stocktype attributes contributed to forecast field performance, the predictive power was low. No simple relationships were found between plant biomass, stem diameter or height at planting and biomass at final harvest in either of the two species under the range of stocktype variation and field conditions tested. Contrary, stem diameter and stem height at planting explained some of the responses in stem diameter and height after two years in the field. Thus, any target seedling approach would have to be based on a combined set of stocktype attributes exploring more productive stocktypes. The differences observed between stocktypes were largely due to size differences and ontogenetic drift, and stocktypes converged towards a similar field phenotype over time.

中文翻译：

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圣诞树种植园冷杉种群的田间建立

摘要 加快田间建立的种群类型属性的识别有可能减少圣诞树生产的轮换时间。在苗圃生产中可以针对此类形态和生理属性。本研究测试了容器类型和苗木密度对种植时的砧木类型属性的影响，以及这些对冷果冷杉和 A. nordmanniana 圣诞树砧木两年内田间表现的影响。苗圃条件对种植时的幼苗属性有相当大的影响。尽管这些相关的种群类型属性有助于预测现场性能，但预测能力很低。没有发现植物生物量之间的简单关系，在测试的种群类型变异范围和田间条件下，这两个物种中的任何一个的种植时的茎直径或高度和最终收获时的生物量。相反，种植时的茎直径和茎高解释了田间两年后茎直径和高度的一些反应。因此，任何目标幼苗方法都必须基于一组组合的种群属性，探索更具生产力的种群类型。种群之间观察到的差异主要是由于体型差异和个体遗传漂移，随着时间的推移，种群趋于相似的田间表型。任何目标幼苗方法都必须基于一组组合的种群类型属性，以探索更具生产力的种群类型。种群之间观察到的差异主要是由于体型差异和个体遗传漂移，随着时间的推移，种群趋于相似的田间表型。任何目标幼苗方法都必须基于一组组合的种群类型属性，以探索更具生产力的种群类型。种群之间观察到的差异主要是由于体型差异和个体遗传漂移，随着时间的推移，种群趋于相似的田间表型。