1 / 18

Tree Growth Unit 10

Tree Growth Unit 10. Objectives. Learn how woody plants grow Know where growth occurs in a tree Understand the relationship of tree ring growth and environmental conditions Describe limiting factors for tree GROWTH. Question.

karena
Download Presentation

Tree Growth Unit 10

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Tree GrowthUnit 10

  2. Objectives • Learn how woody plants grow • Know where growth occurs in a tree • Understand the relationship of tree ring growth and environmental conditions • Describe limiting factors for tree GROWTH

  3. Question • If I were to hammer a nail into a tree 3 feet off the ground and the tree grows 1foot per year. In 25years how far off the ground will the nail be?

  4. How Does A Tree Grow • MERISTEM tissue in the • Bud--crown • Root tips--roots • Cambium--trunk From the MSU AGRSCIENCE WEB PAGE

  5. Roots • Apical MERISTEM protected by a root cap (cells divide and differentiate) • Permanent roots—anchorage • Feeder roots • Root hairs—water and nutrient absorption

  6. Roots • Absorbing roots are concentrated in the top 6-18 inches of soil (water, nutrients and oxygen) • Roots cover 4 to 7 times the area of the crown From the MSU AGRSCIENCE WEB PAGE

  7. Tree Root Classes • Heart root (red oak, honey locust, basswood, pines) • Tap root (hickory, walnut, butternut, white oak and hornbeam) • Flat root (birch, fir, spruce, sugar maple, cottonwood and silver maple) From the Iowa State University Forestry Extension http://www.ag.iastate.edu/departments/forestry/ext/pubs/F-308.pdf

  8. Trunk • Growth in diameter of plants is due to cell division in the cambium • Located just under the bark • Inside—xylem –conducts water and nutrients • Outside—phloem—transports sugars, amino acids, vitamins, hormones and stored food

  9. *Sapwood Heartwood Outer Bark Phloem Cambium Xylem From the MSU AGRSCIENCE WEB PAGE

  10. From the MSU AGRSCIENCE WEB PAGE

  11. From the University of Georgia School of Forestry http://www.forestry.uga.edu/warnell/service/library/index.php3?docID+172

  12. From the MSU AGRSCIENCE WEB PAGE

  13. Wood Types • Spring wood (early wood) • Summer wood (late wood) • Heart wood—old xylem tissue (provides structure and infection resistance) • Sapwood—living xylem active in fluid transport • Phloem—inner bark nutrient transport, outer bark—dead phloem

  14. Factors Affecting Ring Growth From the University of Georgia School of Forestry http://www.forestry.uga.edu/warnell/service/library/index.php3?docID+172

  15. Crown • Buds—apical MERISTEM 3 types • Mixed—shoots—leaves and or flowers • Leaf buds • Shoot buds • Terminal buds--apex of MERISTEM (trunk) • Lateral buds—branches and flowers From: Iowa State University Forestry Extension Notes F-308 www.ag.iastate.edu/departments/forestry/ext/pubs/F-308.pdf

  16. Types Of Buds • Fixed growth—the number of leaves and nodes for next year is fixed by this years resource availability (length of nodes is dependent on next years conditions (pine, oaks hickory) • Free growth—buds containing leaves are preformed but additional leaves can be added depending on that years CONDITONS (cottonwood, willow, and silver maple)

  17. Tree Form • EXCURRENT—strong apical dominance (conical—pines) • DECURRENT—lack of strong apical dominance—deliquescent (large spreading crowns) From: Iowa State University Forestry Extension Notes F-308 www.ag.iastate.edu/departments/forestry/ext/pubs/F-308.pdf

  18. What Have We Learned Today • Learned tree growth occurs in Meristem tissue of Roots (tip), trunk (cambium) and crown (buds) (Down, Out and Up) • Water is the most restrictive factor affecting tree growth (Light, Temperature and Relative humidity)

More Related