Root growth capacity and field performance of jack pine and black spruce in boreal stand establishment in Ontario

1987 ◽  
Vol 17 (8) ◽  
pp. 794-804 ◽  
Author(s):  
R. F. Sutton
Keyword(s):  
Root Growth ◽  
Black Spruce ◽  
Field Performance ◽  
Jack Pine ◽  
Planting Stock ◽  
Growth Capacity ◽  
Root Growth Capacity ◽  
Stand Establishment ◽  
Bare Root ◽  
Planting Season

Data from tests of root growth capacity (RGC) of jack pine (Pinusbanksiana Lamb.) and black spruce (Piceamariana (Mill.) B.S.P.) on subsamples of planting stock outplanted on variously prepared sites appropriate to the species in boreal Ontario are examined in relation to field performance. These data were collected from six outplantings per species (two per annum for 3 years) and from further subsamples of the planting stock planted in low-stress nursery plantings. Five kinds of microsite were outplanted: untreated, Bräcke patch bottom, and two kinds of mound. On each site, 600 bare-root trees, either2 + 0 pine or 1.5 + 1.5 spruce, were slit planted during the spring planting season. The RGC data are designated RGC-a (no. of roots < 1 cm), RGC-b(no. of roots > 1 cm), RGC-c (mean aggregate length of roots > 1 cm), and RGC-d (mean mean length of roots > 1 cm). Against these, all available quantifications of performance were examined by correlation analysis. In general, correlation of RGC-d with 3rd-year field performance was much stronger than that of RGC-a, RGC-b, and RGC-c. In particular, the correlation between RGC-d and 3rd-year survival was highly significant (P < 0.01) in both species.

Survival and growth of four amabilis fir stock types on Vancouver Island

1991 ◽  
Vol 67 (2) ◽  
pp. 147-154 ◽  
Author(s):  
F. T. Pendl ◽  
B. N. D'Anjou
Keyword(s):  
Root Growth ◽  
Lateral Roots ◽  
Survival Rates ◽  
Field Performance ◽  
Vancouver Island ◽  
Growth Capacity ◽  
Root Growth Capacity ◽  
Stock Type ◽  
Stock Types ◽  
Initial Root

Four stock types of amabilis fir (Abies amabilis) planted on Vancouver Island were compared for root growth capacity and field performance. Initial root growth capacity ratings and field performance of the stock types after five years differed significantly. Ranking the stock types by decreasing survival, stem height and diameter: 1 + 1 PBR 211 (89.4%, 78 cm, 15.7 mm), 1 + 0 PSB 313 (79.7%, 73 cm, 13.8 mm), 1 + 0 PSB 211 (76.8%, 66 cm, 12.9 mm) and 2 + 0 BR (58.9%, 59 cm, 11.0 mm). Given current nursery and planting costs and survival rates, the 1 + 0 PSB 313 and 211 are least expensive reforestation options, the 2 + 0 BR and 1 + 1 PBR 211 the most expensive. Root form of samples of each stock type lack well developed tap and lateral roots with root spiralling evident in the styroblock stock. Key words: Amabilis fir, stock types, bareroot, styroblock plugs

Frost hardiness, root growth capacity, and field performance relationships in interior spruce, lodgepole pine, Douglas-fir, and western hemlock seedlings

1990 ◽  
Vol 20 (5) ◽  
pp. 566-572 ◽  
Author(s):  
David G. Simpson
Keyword(s):  
Root Growth ◽  
Lodgepole Pine ◽  
Field Performance ◽  
Douglas Fir ◽  
Frost Hardiness ◽  
Western Hemlock ◽  
Growth Capacity ◽  
Root Growth Capacity ◽  
Forest Sites ◽  
Interior Spruce

Interior spruce (Piceaglaucaengelmannii complex), lodgepole pine (Pinuscontorta Dougl.), Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco), and western hemlock (Tsugaheterophylla (Raf.) Sarg.) were grown from seed for 20 weeks in containers, with 18-h photoperiods. Fortnightly, over a 12-week acclimation period (September 7 – December 1) outdoors at Vernon, B.C., samples were taken for (i) foliage frost hardiness measurement, (ii) poststorage root growth capacity, and (iii) outplanting on forest sites. In all species, frost hardiness and root growth capacity increased with weeks of acclimation. Frost hardiness and root growth capacity were correlated with each other in western hemlock, lodgepole pine, and Douglas-fir, and with field performance (survival or growth) in interior spruce, lodgepole pine, and Douglas-fir.

scholarly journals Filmforming Antitranspirants: Their Effects on Root Growth Capacity, Storability, Moisture Stress Avoidance, and Field Performance of Containerized Conifer Seedlings

1984 ◽  
Vol 60 (6) ◽  
pp. 335-339 ◽  
Author(s):  
David G. Simpson
Keyword(s):  
Root Growth ◽  
Field Performance ◽  
White Spruce ◽  
Moisture Stress ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Growth Capacity ◽  
Root Growth Capacity ◽  
Stress Avoidance ◽  
Vapor Gard

The antitranspirants, XEF-4-3561-A. Wilt Pruf, Plantgard, Folicote, Clear Spray, and Vapor Gard, were sprayed on container-grown lodgepole pine, white spruce, western hemlock, and Douglas-fir seedlings before or after a 12-week cold (+ 2 °C) storage period. The effects of the six antitranspirants on root growth capacity, storability, and field performance varied between species. XEF-4-3561-A. Wilt Pruf, Folicote, and Vapor Gard increased moisture stress avoidance of all species, while Plantgard and Clear Spray had no effect. None of the six antitranspirants are recommended for use on white spruce, western hemlock, or Douglas-fir planting stock because of the risk of reducing field performance. Further trials of XEF-4-3561-A and Wilt Pruf on lodgepolo pine seedlings seem War-ranted.

Black Spruce and Jack Pine Plantation Performance in Boreal Ontario: 10-year Results

1990 ◽  
Vol 7 (4) ◽  
pp. 175-179 ◽  
Author(s):  
James E. Wood
Keyword(s):  
Black Spruce ◽  
Field Performance ◽  
Field Trials ◽  
Jack Pine ◽  
Planting Date ◽  
Stock Type ◽  
Survival And Growth ◽  
Stock Types ◽  
Relative Differences ◽  
Planting Season

Abstract Field trials with black spruce and jack pine were established in boreal Ontario to evaluate the effect of stock type and planting date on plantation performance. Black spruce stock types included FH408 Japanese paperpots, 3 + 0 seedlings and 1.5 + 1.5 transplants. Jack pine stock types included FH408 Japanese paperpots, Ontario Tubes, and 2 + 0 seedlings. Both species were planted during the traditional spring planting season (May-June) as well as in July. Field performance i.e., survival and growth) of black spruce planted in May as FH408 paperpots and 1 5 + 1.5 transplants and in July as paperpots was satisfactory. Jack pine planted in June as paperpots and 2 + 0 seedlings also performed satisfactorily. Although the relative differences in growth among treatments tended to diminish for both species over the study period, some stock-type and planting-date differences were still evident 10 years after planting. North. J. Appl. For. 7:175-179, December 1990.

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