TAILIEUCHUNG - Báo cáo khoa học: "morphological characteristics, root growth potential and flushing response of rooted cuttings compared with transplants of Sitka spruce"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: morphological characteristics, root growth potential and flushing response of rooted cuttings compared with transplants of Sitka spruce. | Ann. For. Sci. 56 1999 201-210 Inra Elsevier Paris 201 Original article The morphological characteristics root growth potential and flushing response of rooted cuttings compared with transplants of Sitka spruce Conor O Reilly Charles Harper Department of Crop Science Horticulture and Forestry Faculty of Agriculture University College Dublin Belfield Dublin 4 Ireland Received 13 March 1998 accepted 13 October 1998 Abstract - The morphological and some physiological attributes of Sitka spruce Picea sitchensis Bong. Carr rooted cuttings derived from juvenile selections in the nursery were compared with those of conventional unimproved transplants grown in Ireland in 1996 and 1997. A field trial was established in the second year to assess flushing and growth responses of the stock. Although some were highly significant absolute differences between stock types in most morphological characteristics were small. Cuttings had much fewer branches cm shoot and root dry weights were smaller than in transplants but the shoot root ratio differed little between stock types. The root growth potential RGP of cuttings was good but was lower than that of the transplants in 1997 but not in 1996. Cuttings flushed 3-5 days earlier than the transplants in the RGP tests and up to 10 days earlier in the field trial. The earlier flushing of the cuttings probably occurred largely because the cuttings were derived from material selected for having rapid juvenile growth rates. The height increment of cuttings was greater than that of transplants after one growing season in the field. Inra Elsevier Paris. vegetative propagation plant quality Sitka spruce Resume - Caractéristiques morphologiques capacité de croissance racinaire débourrement et croissance compares de bou-tures racinées et de semis repiqués d epicea de Sitka Sur épicéa de Sitka Picea sitchensis Bong. Carr des boutures racinées issues de selections juveniles en pépinière ont été comparées à des plants repiqués classiques non .

• Báo cáo khoa học
• Báo cáo lâm nghiệp hay
• cách trình bày báo cáo
• báo cáo lâm nghiệp
• công trình nghiên cứu lâm nghiệp
• tài liệu về lâm nghiệp