Graduate Thesis Or Dissertation
 

The effect of seed source on transpiration rates of seedlings of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

公开 Deposited

可下载的内容

下载PDF文件
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7d278v96m

Descriptions

Attribute NameValues
Creator
Abstract
  • In this study transpiration rates were measured on Douglas-fir seedlings from five seed sources. The seedlings were grown under two environments, a growth chamber and outside in cold frames. Transpiration was measured at two ages, 4 and 16 weeks. Comparison of transpiration rates was made at low soil moisture stress. Transpiration was measured using humidity sensing elements to measure water vapor before and after passing the seedling. A dual bath system was used to control the humidity. Seedlings grown outside transpired significantly more (1% level) than seedlings grown in a growth chamber. For all seed sources combined (outside and growth-chamber-grown) the 16-week-old seedlings transpired less than 4-week-old seedlings, however seedlings from some sources showed increasing transpiration rates with age. This was expressed in a highly statistical significant seed source- environment-age interaction. Among the outside grown seedlings the mesic seed sources had higher transpiration rates than the seedlings from xeric sources. When grown in the growth chamber the xeric sources had higher transpiration rates. Transpiration rates of seedlings from mesic sources were affected more by the growing conditions than seedlings from xeric sources.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
权利声明
Publisher
Language
Digitization Specifications
  • Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 Grayscale), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

关联

Parents:

This work has no parents.

属于 Collection:

单件

缩略图 标题 上传日期 公开度 行动
file details Ruetz_Wolfhard_Friedrich_1968.pdf 2017-08-01 公开 下载