American Journal of Botany, Vol. 100, No. 8 (August 2013), pp. 1651-1662 (12 pages) Premise of the study: Historic colonization and contemporary evolutionary processes contribute to patterns of ...

本研究针对阿尔伯塔省林木改良项目中种子供应与再造林需求不匹配的问题，由当地研究人员通过分析6个扭叶松(Pinus contorta var. latifolia)和8个白云杉(Picea glauca)种子园的历史数据，开发了可视化预测工具，发现多个低产园区并提出扩建方案，对提升林木遗传改良 ...

Richard G. Holloway, Vaughn M. Bryant, Jr. Fossil Picea pollen recovered from the Boriack Bog in central Texas are from layers radiocarbon dated as being older than 15,000 years in age. In an effort ...

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Q: I planted Alberta spruce trees about 10 years ago, and one looks like a white spruce at the top. Can you tell me how and why this happened?- Walter, Livingston Manor A: The dwarf Alberta spruce ...

由于气候变化，森林生长季节的水分供应状况正在发生变化。我们研究了六种幼年温带树种的吸收性细根特征在五年时间内对高土壤水分供应和低土壤水分供应条件的响应程度及其可塑性。 方法 在均匀的土壤环境中，对Acer saccharum、Betula papyrifera、Larix laricina ...

Blue spruce (Picea pungens f. glauca), also called Colorado blue spruce, is a beautiful tree with blue-gray needles. Being colorful and relatively drought tolerant, it’s a favorite of many homeowners ...