Regional Site Research

RCsumdTwo stagnant teenaged but pre-thicket plantations of white Deux plantations stagnantes dl$inettes blanches (Picea glauca spruce (Picea glauca [Moench] Voss) on old-field sites in the[Moench] Voss) adolescentes, au stade fourrC bas, situCes dans Ontario Clay Belt were studied near Cochrane (49"04'N d'anciens champs de la zone argileuse de l'ontario ("Clay Belt") 81 "02 'W). Three herbicide x four fertilization treatments were ont Ct C CtudiCes prks de Cochrane (49'04 'N, 81 "02 'W). 3 herapplied, with four independently randomized replications at each bicides x 4 traitements de fertilisation ont Ct C appliqds, le tout site. Weed control (heavy, moderate and none) was with glyphoassorti de 4 rkpetitions alCatoires indkpendantes dans chaque site. sate, pronamide or nothing, respectively. Ammonium nitrate was Le glyphosate, le pronamide et l'absence de traitement ont Ct C broadcast in the first year at 0.0, 55.9, 112.0 and 167.9 kglha. respectivement utilisCs pour riprimer (fortement, modCrCment Plots were 15 m X 15 m, surrounded by 2-m buffer zones. Peret pas du tout) la vCgCtation indksirable. Un traitement gCnCraformance data on individually identified trees were gathered over lisC au nitrate d'ammonium a Ct C effectuC pendant la premikre a 6-year period in the second decade after planting. Mortality annCe B raison de 0,0,55,9, 112,O et 167,9 kglha. Les parcelles of spruce continued throughout the study and was influenced avaient 15 m et Ctaient entourCes de zones tampons de 2 m. Les significantly (P = 0.01) by tree size and by treatment. MordonnCes sur la performance d'arbres identifiCs individuellement tality increased significantly in treatments that included glyphoont MC recueillies pendant une pCriode de 6 ans, au cours de sate. However, treatments did not significantly (P = 0.05) affect la deuxikme dCcennie suivant la plantation. La mortalit6 de any measured growth parameter. No treatment was silvicultur-I'Cpinette s'est poursuivie pendant toute 1'Ctude et Ctait influencCe ally consequential. Stressed spruce were able to respond only de f a~o n significative (P = 0,Ol) par les dimensions de l'arbre sluggishly to weed control andlor fertilization.et le traitement. La mortalit6 a beaucoup augment6 dans les traitements n'ont pas modifiC de fac;on significative (P = 0,05) aucun des paramktres de croissance measurCs. Aucun traitement n'a eu de rCpercussion d'ordre sylvicole. Les Cpinettes soumises i des facteurs d'agression n'ont pu rCagir que trks lentement i la gestion des vCgCtaux et (ou) i la fertilisation.

Section: The Clute Plantationmentioning

confidence: 99%

White spruce (Picea glauca [Moench] Voss): stagnating boreal old-field plantations unresponsive to fertilization and weed control

Sutton¹

1992

“…Hills in the late 1950s (Chambers et al 1997). Hills recognized that soil and other landscape features have a varied effect on forest growth depending on regional climate (Hills 1960). In light of this, Hills established the Site Regions for Ontario to distinguish areas with similar attributes (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…A Site Region is an area in which similar successional changes in vegetation will occur given a similar physiographic site and disturbance event. Site Regions provide foresters a framework upon which to apply management practices and the findings of silvicultural research (Hills 1960). The Central Ontario FEC (COFEC) defines ecosites based on the vegetation community, soil type, and moisture regime within Site Regions 5E and 4E (Chambers et al 1997; Fig.…”

Section: Introductionmentioning

confidence: 99%

An analysis of the Modeling and Inventory Support Tool: Yield curves vary with Forest Ecosystem Classification

Marina

Thomas

2012

Stand-level growth and yield models are essential to assessing sustainable levels of forest harvest; such assessments are supported in Ontario by the Modeling and Inventory Support Tool (MIST), which combines updated yield estimates and predicted successional trajectories to improve yield forecasts in Ontario. Currently, forest management planning and MIST stratifies the landbase by the Standard Forest Unit (SFU), but not ecosite as defined under the Forest Ecosystem Classification (FEC) system. Here we examined variation in MIST's input and output parameters (site index, top height, and basal area) for ecosites that fall within the definition of the PW1 SFU in Central Ontario (white-pine-dominated sites). Ecosites showed significant differences in site index values and top height, but not basal area, results indicating systematic differences in productivity among ecosites within the SFU. These results show that fine-scale variation in edaphic factors, as indicated by ecosite information, correspond to differences in stand productivity, and suggest the importance of a more harmonized approach between yield modeling, SFUs, and the FEC system in Ontario.

“…This experiment is located in McAuslan Township, North Bay District, about 95 km north east of North Bay, close to the northern boundary of the Georgian Bay Site Region 5E (Hills 1960). In the spring of 1960, 3-0 and 2-2 red pine from Midhurst Nursery were planted in each of the following four combinations of site preparation and planting method:…”

Section: Introductionmentioning

confidence: 99%

Planting recommendations for blueberry — sweetfern sites in northern Ontario

Mulliν¹

1975

This is an extension of a 1968 report on experiments established to study species, age-classes, and planting site treatments for blueberry-sweet-fern (Vaccinium-Comptonia) sites in northern Ontario. Red pine (3–0 and 2–2) and jack pine (2–0 and 2–1) were planted in scalped spots, in furrows, in herbicide-spray strips, in ground cover, and in bulldozed plots. This report is based on survival and height at 10 years after planting.The results suggest that jack pine is more satisfactory than red pine, producing much greater aggregate height (survival × average height). In both species transplants performed better than seedlings. Comparisons of site treatment and planting methods showed that furrowing and bulldozing were both satisfactory for 2–2 red pine, but that bulldozing was clearly the best method for jack pine.Reforestation of dry "blueberry-sweetfern" sites in north-central and northeastern Ontario has often been difficult. These plant associations occur on dry sands and gravels, usually following a fire, or a cutover and burn. The ground cover is Vaccinium spp. and Comptonia peregrina (L) Coult., with scattered herbs and grasses. There may also be light or open cover of trees, such as jack pine Pinus banksiana Lamb.), white birch (Betula payrifera Marsh) and trembling aspen (Populus tremuloides Michx.). Jack pine is the common species for planting but under some local conditions red pine (Pinus resinosa Ait.) may be preferred.In 1959 experimental plots were established in the forest districts of Chapleau, Swastika and North Bay, to examine some aspects of the planting requirements for these sites. This report is based on the tenth-year survival and height measurements at Swastika and North Bay. The Chapleau plots are not included because of uncertainty caused by invasion of natural seedlings. An earlier report (Mullin 1968a) was based on the Chapleau and Swastika plots to the fifth-year after planting.