Effects of wood chip ash fertilization on soil chemistry in a Norway spruce plantation on a nutrient-poor soil

TY - JOUR

T1 - Effects of wood chip ash fertilization on soil chemistry in a Norway spruce plantation on a nutrient-poor soil

AU - Ingerslev, Morten

AU - Hansen, Mette

AU - Pedersen, Lars Bo

AU - Skov, Simon

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Harvest of forest biomass for energy production may lead to export of nutrients from the forest. Recirculation of nutrients from wood chip combustion by ash spreading in forests has been proposed as a means for counteracting the nutrient export. This study was carried out to examine the effect of wood chip ash application on soil chemistry in a 44-year-old Norway spruce (Picea abies) plantation on a nutrient-poor soil in Denmark and to investigate the effect of applying different ash types and doses. Soil samples were collected and analyzed 2.5years (3 growing seasons) after ash application. This study shows that, regardless of ash formulation, preparation or dose, application of wood ash to forest soil has a liming effect in the O-horizon manifested as an increase in CECe, BS and pH. This effect was not seen in the mineral soil within the time frame of this study. At the same time, an increase in Cd was found in the O-horizon, corresponding to the amount added in the ashes. Generally, no other increase in soil contents of the heavy metals was seen. Hardening of the wood ash did not decrease the chemical impact on the soil chemistry as compared to non-treated ash whereas an increase in ash application dose increases the liming effect.

AB - Harvest of forest biomass for energy production may lead to export of nutrients from the forest. Recirculation of nutrients from wood chip combustion by ash spreading in forests has been proposed as a means for counteracting the nutrient export. This study was carried out to examine the effect of wood chip ash application on soil chemistry in a 44-year-old Norway spruce (Picea abies) plantation on a nutrient-poor soil in Denmark and to investigate the effect of applying different ash types and doses. Soil samples were collected and analyzed 2.5years (3 growing seasons) after ash application. This study shows that, regardless of ash formulation, preparation or dose, application of wood ash to forest soil has a liming effect in the O-horizon manifested as an increase in CECe, BS and pH. This effect was not seen in the mineral soil within the time frame of this study. At the same time, an increase in Cd was found in the O-horizon, corresponding to the amount added in the ashes. Generally, no other increase in soil contents of the heavy metals was seen. Hardening of the wood ash did not decrease the chemical impact on the soil chemistry as compared to non-treated ash whereas an increase in ash application dose increases the liming effect.

KW - Bioenergy

KW - Fertilization

KW - Forest

KW - Nutrient recycling

KW - Plant nutrition

KW - Wood ash

U2 - 10.1016/j.foreco.2014.08.034

DO - 10.1016/j.foreco.2014.08.034

M3 - Journal article

AN - SCOPUS:84907541059

SN - 0378-1127

VL - 334

SP - 10

EP - 17

JO - Forest Ecology and Management

JF - Forest Ecology and Management

ER -