CARBON STOCK IN THE ABOVEGROUND VEGETATION OF REMEDIATED LAND QUARRIES IN NORTHWEST RUSSIA
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Abstract
Background: Forest re-cultivation can shorten the formation of tree stand and favor accumulation of carbon dioxide. The growth rates, biomass accumulation and carbon sequestration in stands of native Scots pine (Pinus sylvestris L.) (SP) and introduced lodgepole pine (Pinus contorta Dougl.) (LP) on remediated land quarries were studied. A comparative analysis of the parameters is given 1) in cultures using same planting material (bare-root SP seedlings) but developing on different parent materials (ancient alluvial sands, fluvioglacial sandy loams, and moraine loams) and 2) in pine cultures on the same deposits (fluvioglacial sandy loams), but using different planting materials: bare-root SP seedlings, container SP seedlings and container LP seedlings. Allometric equations were used to calculate stand biomass. The ground cover biomass was determined by the mowing method.
Results: Biometric parameters, biomass and carbon reserves, and the share of wood in the total biomass reserves increase along with the soil texture transformation from sands to silty loams.
The aboveground biomass is dominated by mosses and lichens on sands to sandy loams and by grasses on loams. The LP cultures have better growth, survival, biomass and carbon sequestration values compared with those of the SP.
Conclusion: The soil conditions of quarries affect the growth and survival, biomass and carbon sink of pine crops. The LP is recommended for forest recultivation on the territory of northwest Russia.
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