The Effects of Wrenching on Drought Avoidance of Douglas-fir (Pseudotsuga Menziesii (Mirb.) Franco) Seedlings in Northwestern California PDF Download
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Author: Kenneth B. Koon
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 72
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Book Description
Author: Kenneth B. Koon
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 72
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Book Description
Author: Mary L. Duryea
Publisher: Springer Science & Business Media
ISBN: 9400961103
Category : Technology & Engineering
Languages : en
Pages : 365
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Book Description
ing damage ranged from odor. to general visual appearance. Attributes of seedling quality are categorized as either to cutting buds. to scraping bark to detect dead cambium. performance attributes (RGP. frost hardiness. stress resistance) One nursery reported using frost hardiness as an indicator of or material attributes (bud dormancy. water relations. nutrition. when to begin fall lifting. but none reported using it as an morphology). Performance attributes are assessed by placing indicator of seedling quality before shipping stock to customers. samples of seedlings into specified controlled environments and evaluating their responses. Although some effective short 23.4.3 Stress resistance cut procedures are being developed. performance tests tend Only three nurseries measure stress resistance. They use to be time consuming; however, they produce results on whole the services of Oregon State University and the test methods plant responses which are often closely correlated with field described in 23.2.3. One nursery reported that results of stress performance. Material attributes. on the other hand. reflect tests did not agree well with results of RGP tests and that RGP only individual aspects of seedling makeup and are often correlated better with seedling survival in the field. Most stress poorly correlated with performance. tests are conducted for reforestation personnel rather than for Bud dormancy status seems to be correlated. at least nurseries.
Author: William I. Stein
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 16
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 200
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Author: Michael P. Kinch
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 196
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Author: James L. Lindquist
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 6
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Author: Daniel L. Noble
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 8
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Author: Richard E. Miller
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 20
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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1364
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Author: Glenn Thomas Howe
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Douglas-fir (Pseudotsuga menziesii) is a widely distributed, ecologically important, and commercially valuable tree species in North America. However, climate change is expected to adversely impact Douglas-fir trees, and assisted migration may become necessary to lessen the effects of climate change. Because drought stress is one of the projected effects of climate change in the western U.S., it is increasingly important to include drought adaptation traits in breeding programs and in reforestation decisions.In this study, I addressed the following objectives: (1) obtain baseline measurements and climate data to help in the analysis and interpretation of future measurements in the Drought Hardiness Study; (2) characterize the quantitative genetics of drought adaptation traits; and (3) determine whether drought adaptation traits are associated with the climatic origin of Douglas-fir seedlings. To achieve these objectives, data were collected from about 10,000 Douglas-fir seedlings from 429 families from western Oregon and Washington that were planted at two sites (Sprague and Lost Creek) in southern Oregon. Measured variables, which I refer to as drought adaptation traits, included height, second flushing, spring bud flush, damage (foliage, stems, and leaders), and survival. I will discuss the design and results of a study that help increase the understanding about the importance of climatic-driven genetic differences for drought adaptation traits in Douglas-fir. The results of this study will provide useful information for understanding drought, enhancing breeding programs, and potentially adjusting forest management to climate change impacts.
