Growth ring | Annual Rings, Cambium Layer & Xylem Cells
网页growth ring, in a cross section of the stem of a woody plant, the increment of wood added during a single growth period. In temperate regions the growth period is usually one year, in which case the growth ring may be called an “annual ring.” In tropical regions, growth rings may not be discernible or are not annual.
Annual Rings - Encyclopedia.com
网页2018年5月9日 · annual ring (growth ring) Concentric circles visible in cross-sections of woody stems or trunks. Each year the cambium layer produces a layer of xylem, the vessels of which are large and thin-walled in the spring and smaller and thick-walled in the summer, creating a contrast between the rings.
Annual ring Definition & Meaning - Merriam-Webster
网页2024年1月21日 · The meaning of ANNUAL RING is the layer of wood produced by a single year's growth of a woody plant.
Dendrochronology - Wikipedia
网页Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed in a tree. As well as dating them, this can give data for dendroclimatology, the study of climate and atmospheric conditions during different periods in history from the wood of old trees.
3.3.3: Secondary Stem - Biology LibreTexts
网页These are called annual rings (tree rings; Figure \(\PageIndex{9-10}\)) and can be used to determine the age of a tree or branch through the study of dendrochronology. Furthermore, thick annual rings indicate wet years, and thin annual rings indicate dry years.
年轮（多年生木本植物茎的横断面上的同心环纹）_百度百科
网页[1] 多年生木本植物茎的 横断面 上的 同心环 纹。 常见于温带的乔木与灌木，通常每年一轮。 在 温带 地区年轮界限明显。 热带 地区由于一年内气候变化不大，年轮就不明显。 [2] 中文名. 年轮. 外文名. annual ring. 别 名. 生长轮. 形 状. 周期环状轮圈. 特 例. 单子叶植物无年轮. 适用对象. 木本植物. 目录. 1 形成原因. 2 影响因素. 3 主要分类. 早材. 晚材. 急变. 渐变. 假年 …
How tree rings tell time and climate history | NOAA Climate.gov
网页2018年11月29日 · Rings of trees growing in temperate climates can indeed tell their age through their annual rings and also help determine the age of wood used to construct buildings or wooden objects. The ages of wooden objects can be revealed by cross-dating, the process of matching ring patterns between wood samples of known and unknown ages.
Tree Rings - Dendrochronology and Dendroclimatology - Science …
网页2024年3月23日 · Tree rings or growth rings are annual records of a tree’s life and environmental conditions. Trees grow by adding new layers of wood around their trunks every year. In regions with seasonal climate variations, this growth results in distinct rings, each representing one year of a tree’s life.
All About Annual Growth Rings - Kretz Lumber
网页2020年4月1日 · Annual growth rings are the circular rings found on the end of a log or tree stump. Each set of rings signifies one year of growth. Each year of growth has two distinct growing seasons: spring and summer.
(PDF) Formation of annual rings in trees - ResearchGate
网页1993年1月1日 · Annual rings of "secondary" xylem, or wood, arise through cell division activity in the vascular cambium. Diagrammatic representation of dormancy onset in radial files in vascular cambium of a...