Skip to Main Content
Mass production alternatives for fast-growing spruce hybridsAuthor(s): Hans Nienstaedt
Source: In: Proceedings of the Thirteenth Lake States Forest Tree Improvement Conference; Gen. Tech. Rep. NC-50. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. 56-71
Publication Series: General Technical Report (GTR)
Station: North Central Research Station
PDF: View PDF (214.46 KB)
DescriptionA reciptrocal crossing program of Picea glauca and P. omorika, and P. mariana and P. omorika with adequate intraspecific control crosses was carried out. Yields of full seed/cone ranged from 0 to 2.6 for the P. glauca-P. omorika combination. These low seed sets and a 9-day difference in female receptivity rule out producing this hybrid via seed. The full seed/cone yields of the P. mariana-P. omorika combinations averaged approximately half the yield of the intraspecific crosses. However, receptivity of the two species is well synchronized and in spite of reduced yields, mass production via seed is a practical option. A seed orchard design is outlined and a 4-acre grafted orchard may produce at least 75,000 plantable seedlings on 6- to 8-year-old grafts. Results of a rooting trial of selected hybrid seedlings are described. A practical mass production program for the P. glauca-P. omorika combination based on rooted cuttings is described. The program would be based on juvenile selection among 4-year-old seedlings, cloning, and the simultaneous establishment of clonal trials and hedges. The hedges would be a source of cuttings for future mass production--a hedge 400 feet long by 5 feet high would produce a minimum of 20,000 cuttings annually.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationNienstaedt, Hans. 1977. Mass production alternatives for fast-growing spruce hybrids. In: Proceedings of the Thirteenth Lake States Forest Tree Improvement Conference; Gen. Tech. Rep. NC-50. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. 56-71
- Flower production on clonal orchards at Oconto River Seed Orchard in Wisconsin
- Timing of fire relative to seed development controls availability of non-serotinous aerial seed banks
- Some observations on age relationships in spruce-fir regeneration
XML: View XML