Effect of redistributing windrowed topsoil on growth and development of ponderosa pine plantations

Zhang, Jianwei; Young, David H.; Luckow, Kenneth R.

doi:10.1016/j.foreco.2015.05.039

Cited by 2 publications

(2 citation statements)

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“…This might require windrowing, i.e, concentrating debris into rows, so that other site preparation and regeneration treatments can be performed (e.g., scarification, planting). Windrows increase unproductive areas and accumulate nutrients away from the regenerating zones (Zhang et al 2015). Also, windrows provide habitats for small animals, such as the southern red-backed vole (Myodes gapperi) and the long-tailed vole (Microtus longicaudus), which can damage newly planted trees (Sullivan and Sullivan 2014).…”

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confidence: 99%

Biomass procurement in boreal forests affected by spruce budworm: effects on regeneration, costs, and carbon balance

Gouge

Thiffault

2021

Can. J. For. Res.

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Biomass procured from forests affected by natural disturbances as a bioenergy source is increasingly considered in the context of climate change mitigation. By comparing clearcuts with and without biomass procurement, we aimed to determine the effects of biomass extraction performed alongside lumber harvesting on regeneration density, number of planting microsites, forest renewal costs, and carbon fluxes, in harvested boreal stands affected by spruce budworm. Results showed that biomass procurement increased regeneration density and number of planting microsites. Reduction of downed woody debris due to biomass procurement lowered site preparation costs by 282.07 CAD•ha-1, equivalent to 14.45 CAD per oven-dry metric tonne (odmt-1) of harvested biomass. Product value from biomass processing had to reach from 13.90–76.84 CAD•odmt-1 to make biomass procurement operations profitable. Since biomass procurement significantly increased stocking and reduced the amount of decaying debris, it also reduced cumulative CO2 emissions relative to scenarios without biomass procurement. However, ensuring forest renewal through site preparation and plantation per se, irrespective of biomass procurement, played a more important role for carbon sequestration and net balance. Integrating biomass harvesting to silviculture could have significant ecological and financial impacts on forest management while supporting mitigation efforts against climate change.

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confidence: 99%

Biomass procurement in boreal forests affected by spruce budworm: effects on regeneration, costs, and carbon balance

Gouge

Thiffault

2021

Can. J. For. Res.

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“…This is because all of the dead trees (standing or down) were included in the planted tree C pool. However, these numbers are much larger than forest floor C on plantations that have recently been thinned or treated with other silvicultural operations [33,34]. These thinning operations disturb the forest floor when thinned trees are dragged out of the plantations.…”

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confidence: 99%

Effect of Silviculture on Carbon Pools during Development of a Ponderosa Pine Plantation

Zhang

Mattson

et al. 2020

Forests

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Forest stands can be considered as dynamic carbon pools throughout their developmental stages. Silvicultural thinning and initial planting densities for reforestation not only manipulate the structure or composition of vegetation, but also disturb forest floor and soils, which, in turn, influences the dynamics of carbon pools. Understanding these carbon pools both spatially and temporally can provide useful information for land managers to achieve their management goals. Here, we estimated five major carbon pools in experimental ponderosa pine (Pinus ponderosa) plots that were planted to three levels of spacing and where competing vegetation was either controlled (VC) or not controlled (NVC). The objectives were to determine how an early competing vegetation control influences the long-term carbon dynamics and how stand density affects the maximum carbon (C) sequestration for these plantations. We found that planting density did not affect total ecosystem C at either sampling age 28 or 54. Because of competing vegetation ingrowth, the NVC (85 ± 14 Mg ha−1) accumulated greater C than the VC (61 ± 6 Mg ha−1) at age 28. By age 54, the differences between treatments narrow with the NVC (114 ± 11 Mg ha−1) and the VC (106 ± 11 Mg ha−1) as the pines continue to grow relatively faster in the VC when compared to NVC and C of ingrowth vegetation decreased in NVC, presumably due to shading by the overstory pines. The detritus was not significantly different among treatments in either years, although the mean forest floor and soil C was slightly greater in NVC. While NVC appears to sequester more C early on, the differences from the VC were rather subtle. Clearly, as the stands continue to grow, the C of the larger pines of the VC may overtake the total C of the NVC. We conclude that, to manage forests for carbon, we must pay more attention to promoting growth of overstory trees by controlling competing vegetation early, which will provide more opportunities for foresters to create resilient forests to disturbances and store C longer in a changing climate.

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Effect of redistributing windrowed topsoil on growth and development of ponderosa pine plantations

Cited by 2 publications

References 11 publications

Biomass procurement in boreal forests affected by spruce budworm: effects on regeneration, costs, and carbon balance

Biomass procurement in boreal forests affected by spruce budworm: effects on regeneration, costs, and carbon balance

Effect of Silviculture on Carbon Pools during Development of a Ponderosa Pine Plantation

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