scholarly journals Response of soil CO2 and O2 concentrations to forest soil compaction at the Long-term Soil Productivity sites in central British Columbia

2000 ◽  
Vol 80 (4) ◽  
pp. 625-632 ◽  
Author(s):  
T. S. S. Conlin ◽  
R. van den Driessche
Keyword(s):  
British Columbia ◽  
Soil Compaction ◽  
Carbon Allocation ◽  
Substantial Effect ◽  
Soil Productivity ◽  
Soil Co2 ◽  
Soil Nutrition ◽  
Growing Seasons ◽  
Whole Plant

The concentrations of soil CO2 and O2 at three Long-term Soil Productivity sites located in the Sub-Boreal Spruce biogeoclimatic zone of British Columbia, Canada, were monitored over several growing seasons. These sites were treated with three levels of soil compaction and three levels of organic material removal following forest harvest. Both compaction and depth had a significant effect upon soil CO2 concentrations and average values increased in response to deeper sampling and compaction. Removal of the forest floor and other organic materials had no significant effect upon soil CO2 and O2 concentrations. Mean soil CO2 concentrations varied from site to site and data collected over three growing seasons also showed that mean CO2 values in response to compaction fluctuated significantly from year to year. The high levels of soil CO2 observed in this study (up to 40 000 µ L L−1), especially in response to the compaction treatments, may have had a substantial effect upon whole plant carbon allocation as well as soil nutrition available to trees growing on the treated plots. Although mean soil O2 also decreased in response to compaction and sampling depth, these lower concentrations did not approach the levels required to influence plant growth. Key words: Soil, compaction, carbon dioxide, oxygen, long-term soil productivity

Effects of forest soil compaction and organic matter removal on leaf litter decomposition in central British Columbia

1999 ◽  
Vol 79 (4) ◽  
pp. 543-550 ◽  
Author(s):  
J. M. Kranabetter ◽  
B. K. Chapman
Keyword(s):  
British Columbia ◽  
Organic Matter ◽  
Litter Decomposition ◽  
Soil Compaction ◽  
Soil Productivity ◽  
Decomposition Rates ◽  
Nutrient Translocation ◽  
Organic Matter Removal ◽  
Whole Tree

As part of the long-term soil productivity study in central British Columbia, we examined the effect of soil compaction and organic matter removal on trembling aspen (Populus tremuloides Michx.) litter decomposition. We compared three levels of organic matter removal (stem-only, whole-tree harvest, and scalped mineral soil) and two levels of compaction (no compaction and heavy compaction) in a factorial design replicated as blocks on three sites. Whole-tree harvesting significantly increased litter decomposition rates compared to stem-only (by 36%) and scalped (by 41%) treatments. Soil compaction had inconsistent effects on decomposition rates (k) for forest floor and scalped treatments and, overall, did not significantly affect litter decomposition rates. Litter on scalped plots had higher rates of nutrient translocation than litter on forest floors. We found the treatments altered soil heat sums, so changes in temperatures at the soil surface might be partly responsible for the changes in decomposition rates. We could not detect differences in soil mesofauna populations collected from the litter bags, so treatment effects on fauna probably had less influence than microclimate on decomposition rates. The effects of these early changes in litter decomposition on biological productivity will be part of the ongoing long-term soil productivity study. Key words: Litter decomposition, soil compaction, scalping, whole-tree harvest, nutrient translocation

Response of lodgepole pine health to soil disturbance treatments in British Columbia, Canada

2015 ◽  
Vol 45 (8) ◽  
pp. 1045-1055 ◽  
Author(s):  
Anya M. Reid ◽  
William K. Chapman ◽  
John Marty Kranabetter ◽  
Cindy E. Prescott
Keyword(s):  
British Columbia ◽  
Organic Matter ◽  
Soil Compaction ◽  
Lodgepole Pine ◽  
Mineral Soil ◽  
Forest Health ◽  
Soil Disturbance ◽  
Base Saturation ◽  
Soil Productivity ◽  
Health Response

Soil disturbance from organic matter loss and soil compaction can impair site productivity, but less is known about whether these disturbances also affect forest health (defined here as the presence and severity of damaging pests and diseases, mortality, and overall vigour). We used six long-term soil productivity (LTSP) sites in the interior of British Columbia, Canada to test the effects of organic-matter removal and soil compaction on forest health, and to explore the relationship between forest health response and potential indicators of site sensitivity: mineral soil pH, base saturation, carbon to nitrogen ratio (C:N), carbon to phosphorus ratio (C:P), and calcium to aluminum ratio (Ca:Al). Visual forest health surveys were conducted on 5400 15 and 20 year old lodgepole pine (Pinus contorta Dougl. ex Loud.) trees. Soil disturbance treatments significantly affected forest health metrics, but this response typically differed among sites. Principle component analyses indicated the response of healthy trees was negatively related to soil base saturation, the response of dead or dying trees related to soil C:P, and the response of tree disease related to soil Ca:Al, pH, base saturation, and C:N. We found forest health response to soil disturbance varied among sites with relationships between response and soil chemical properties, suggesting a greater vulnerability of pine stands to disease with increasing soil acidity.

Effects of organic matter removal, soil compaction, and vegetation control on 5-year seedling performance: a regional comparison of Long-Term Soil Productivity sites

2006 ◽  
Vol 36 (3) ◽  
pp. 529-550 ◽  
Author(s):  
Robert L Fleming ◽  
Robert F Powers ◽  
Neil W Foster ◽  
J Marty Kranabetter ◽  
D Andrew Scott ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Compaction ◽  
Forest Floor ◽  
Soil Productivity ◽  
Individual Tree ◽  
Seedling Performance ◽  
Organic Matter Removal ◽  
Vegetation Control ◽  
Wide Range

We examined fifth-year seedling response to soil disturbance and vegetation control at 42 experimental locations representing 25 replicated studies within the North American Long-Term Soil Productivity (LTSP) program. These studies share a common experimental design while encompassing a wide range of climate, site conditions, and forest types. Whole-tree harvest had limited effects on planted seedling performance compared with the effects of stem-only harvest (the control); slight increases in survival were usually offset by decreases in growth. Forest-floor removal improved seedling survival and increased growth in Mediterranean climates, but reduced growth on productive, nutrient-limited, warm–humid sites. Soil compaction with intact forest floors usually benefited conifer survival and growth, regardless of climate or species. Compaction combined with forest-floor removal generally increased survival, had limited effects on individual tree growth, and increased stand growth in Mediterranean climates. Vegetation control benefited seedling growth in all treatments, particularly on more productive sites, but did not affect survival or alter the relative impact of organic matter removal and compaction on growth. Organic matter removal increased aspen coppice densities and, as with compaction, reduced aspen growth.

Soil physical property changes at the North American Long-Term Soil Productivity study sites: 1 and 5 years after compaction

2006 ◽  
Vol 36 (3) ◽  
pp. 551-564 ◽  
Author(s):  
Deborah S Page-Dumroese ◽  
Martin F Jurgensen ◽  
Allan E Tiarks ◽  
Felix Ponder, Jr. ◽  
Felipe G Sanchez ◽  
...  
Keyword(s):  
Bulk Density ◽  
North American ◽  
Soil Compaction ◽  
Soil Bulk Density ◽  
Water Infiltration ◽  
Soil Productivity ◽  
Soil Monitoring ◽  
The North ◽  
The Impact

The impact of forest management operations on soil physical properties is important to understand, since management can significantly change site productivity by altering root growth potential, water infiltration and soil erosion, and water and nutrient availability. We studied soil bulk density and strength changes as indicators of soil compaction before harvesting and 1 and 5 years after harvest and site treatment on 12 of the North American Long-Term Soil Productivity sites. Severe soil compaction treatments approached root-limiting bulk densities for each soil texture, while moderate compaction levels were between severe and preharvest values. Immediately after harvesting, soil bulk density on the severely compacted plots ranged from 1% less than to 58% higher than preharvest levels across all sites. Soil compaction increases were noticeable to a depth of 30 cm. After 5 years, bulk density recovery on coarse-textured soils was evident in the surface (0–10 cm) soil, but recovery was less in the subsoil (10–30 cm depth); fine-textured soils exhibited little recovery. When measured as a percentage, initial bulk density increases were greater on fine-textured soils than on coarser-textured soils and were mainly due to higher initial bulk density values in coarse-textured soils. Development of soil monitoring methods applicable to all soil types may not be appropriate, and more site-specific techniques may be needed for soil monitoring after disturbance.

Comparing lodgepole pine growth and disease occurrence at six Long-Term Soil Productivity (LTSP) sites in British Columbia, Canada

2016 ◽  
Vol 46 (4) ◽  
pp. 595-599 ◽  
Author(s):  
Anya M. Reid ◽  
William K. Chapman ◽  
Cindy E. Prescott
Keyword(s):  
British Columbia ◽  
Tree Growth ◽  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Forest Health ◽  
Soil Productivity ◽  
Growth Data ◽  
Disease Occurrence ◽  
Disease Attack

Recently, the assumption that stands with fast growth will have minor losses to insect and disease attack has been challenged. Although tree growth and health are both critical for long-term forest productivity, standardized forest-health data are rarely collected in conjunction with tree-growth data. Using six Long-Term Soil Productivity (LTSP) installations in British Columbia, Canada, we explore the relationships between lodgepole pine (Pinus contorta Douglas ex Loudon) growth and disease occurrence. Treatment plots and random groups of 100 trees that had larger trees generally had more disease. These findings suggest that we can no longer assume that fast-growing plantations will be free of disease, which has implications for predicting future timber supply.

Connecting Crop Nutrient Use Efficiency to Future Soil Productivity

2018 ◽  
Vol 102 (4) ◽  
pp. 8-10
Author(s):  
Fernando García ◽  
Andrés Grasso ◽  
María González Sanjuan ◽  
Adrián Correndo ◽  
Fernando Salvagiotti
Keyword(s):  
Nutrient Management ◽  
Nutrient Use Efficiency ◽  
Management Strategies ◽  
Crop Productivity ◽  
Soil Productivity ◽  
Nutrient Use ◽  
Grain Crop ◽  
Wide Scale ◽  
Use Efficiency

Trends over the past 25 years indicate that Argentina’s growth in its grain crop productivity has largely been supported by the depletion of the extensive fertility of its Pampean soils. Long-term research provides insight into sustainable nutrient management strategies ready for wide-scale adoption.

Sign in / Sign up

Export Citation Format

Share Document