登入選單

返回Google圖書搜尋

Long-term Effects of Elevated Carbon Dioxide Concentration on Sour Orange Tree Specific Gravity and Anatomy

Michael Carl Wiemann

出版	Forest Products Laboratory, 2008
URL	http://books.google.com.hk/books?id=LCbxYXOLPB8C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

Exposure to elevated levels of atmospheric CO2 for a period of 17 years resulted in small but statistically significant decreases in wood basic specific gravity and number of rays per millimeter. Other anatomical characteristics (percentages of tissues, number of vessels per square millimeter, vessel diameters, and fiber wall thickness) were unaffected by treatment. Differences due to distance from pith were important, but cardinal direction (north, south, east, west) was not.