Canadian Journal of Forest Research
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Ectomycorrhizal fungal communities of nursery-inoculated seedlings outplanted on clear-cut sites in northern AlbertaSeedlings from three conifer species (Pinus contorta Doug. ex Loud. var. latifolia Englem., Picea glauca (Moench) Voss, and Picea mariana (Mill.) BSP) were planted on two clear-cut sites in Alberta, Canada, after inoculation in the nursery with strains of six different ectomycorrhizal species (Hebeloma longicaudum, Laccaria bicolor,Paxillus involutus,Pisolithus tinctorius,Rhizopogon vinico... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 36 Số 7 - Trang 1684-1694 - 2006
Effects of ontogeny and soil nutrient supply on production, allocation, and leaf area efficiency in loblolly and slash pine stands The effects of ontogeny and soil nutrient supply on aboveground biomass accumulation, allocation, and stemwood growth efficiency of loblolly (Pinus taeda L.) and slash pine (Pinus elliottii Engelm. var. elliottii) were investigated in north-central Florida over 16 years using a 2 × 2 × 2 factorial experiment (species, fertilization, weed control). Aboveground biomass growth responses to t... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 30 Số 10 - Trang 1511-1524 - 2000
Optimum foliar nitrogen concentration in pine and its change with stand age Levels of nitrogen in foliage associated with optimum growth of pine were determined in two hydroponic experiments in the glasshouse and two forest fertilizer experiments each designed to cover the full response range for Pinusnigra var. maritima (Ait.) Melv. During the years prior to canopy closure optimum nitrogen concentrations declined with the logarithm of tree weight, falling from 3... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 11 Số 3 - Trang 563-572 - 1981
Effects of slash and litter management on fluxes of nitrogen and tree growth in a young Pinusradiata plantation The effects of slash and litter management practices on soil water and temperature, fluxes of mineral N, needle water potential, and tree nutrition and growth were studied in a young Pinusradiata D. Don plantation growing on a sandy Podzol in southeastern Australia. Treatments were slash and litter retained (SL), litter only retained (L), litter ploughed (LP), and slash and litter removed... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 20 Số 9 - Trang 1498-1507 - 1990
Effect of vegetative competition on the moisture and nutrient status of loblolly pine A field study examined the effects of competing vegetation on the moisture and nutrient status of 5-year-old loblolly pines (Pinustaeda L.). Similar experiments were conducted on a Piedmont site and a Coastal Plain site using individual pines as experimental units. Predawn measurements of xylem pressure potential were made using detached needle fascicles, and nutrient concentrations in so... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 14 Số 1 - Trang 1-9 - 1984
Comparison of duration and method of herbaceous weed control on loblolly pine response through midrotation Herbaceous weed control studies installed by the Auburn University Silvicultural Herbicide Cooperative to examine response to methods and duration of herbaceous weed control in eight loblolly pine (Pinustaeda L.) plantations were analyzed to determine stand response through age 9. Studies were designed to compare weed control treatments with an untreated check, weed control methods (band ... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 23 Số 10 - Trang 2116-2125 - 1993
A long-term study of tree seedling recruitment in southern Appalachian forests: the effects of canopy gaps and shrub understoriesWe examined the importance of intermediate-sized gaps and a dense shrub layer on tree seedling recruitment in a southern Appalachian deciduous forest. We created 12 canopy gaps under two contrasting understory conditions: 6 gaps were dominated by the dense, shade-producing shrub, Rhododendron maximum L., while the remaining gaps were relatively open. Density of first-year and >first-yea... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 30 Số 10 - Trang 1617-1631 - 2000
Area-based breeding zones to minimize maladaptation A new breeding zone delineation scheme identifies for a given number of zones the zone-boundary placement that minimizes regional maladaptation in breeding programs. First, an adaptive map is created by using conventional genetic test data. Then, the large array of predicted adaptive values is subjected to cluster analysis, which assigns each grid cell of the region to one of a predetermi... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 34 Số 3 - Trang 695-704 - 2004
Influence of species proportion and timing of establishment on stem quality in mixed red alder Douglas-fir plantations The relationships among stand structure, Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) branch characteristics, and red alder (Alnus rubra (Bong.)) stem form attributes were explored for 10- to 15-year-old trees growing in mixed Douglas-fir red alder plantations. Treatments included a range of species proportions, and red alder was either planted simultaneously with Douglas-fir or a... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 34 Số 4 - Trang 863-873 - 2004
Effects of nitrogen fertilizer source and application rates on foliar nitrogen concentration, photosynthesis, and growth of Douglas-fir The effects of nitrogen fertilization on foliage nitrogen concentration, rates of photosynthesis, and stem diameter growth were studied for Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) trees, with a range of fertilizer applications from 0 to 896 kg N/ha. Ammonium nitrate (AN) and urea were compared as nitrogen sources. AN provided for a higher foliage nitrogen concentration and bette... ... hiện toàn bộ
Canadian Journal of Forest Research - Tập 11 Số 4 - Trang 775-780 - 1981
Tổng số: 165
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