Download Soil microbiochemical properties as indicators for success of

Soil microbiochemical properties as indicators for success of heathland
restoration after military disturbance
Heitkamp F., Glatzel S., Michalzik B., Fischer E. and Gerold G. (2008)
Land Degradation & Development 28: 408-420
Abstract
Decline of heathlands in Central Europe raises the question of successful restoration of
degraded heathlands. We examined the impact of different restoration techniques on
soilmicrobial biomass carbon (Cmic) and nitrogen (Nmic) and enzyme activity on an abandoned
military training site in the Lüneburger Heaths. The aim was to determine which technique
resulted in typical heathland soil conditions. The training site was in use for about 50 years.
Vegetation and soils were degraded in large areas. Restoration actions were: (1) spreading of
heath plaggen (sods, containing the organic layer and a few centimetres mineral soil), (2)
spreading of heath plaggen and grass seeds (Festuca filiformis Pourr.), (3) spreading of F.
filiformis-seeds and (4) succession (episodical tree removal). Ten years after restoration, we
measured pH, bulk density, abundance of roots, soil organic carbon (SOC), nitrogen (Nt),
phosphorus (Pt), Cmic, Nmic and acid phosphatase activity (AcP) in the first 10 cm of the
mineral soil. Four restoration treatments were compared with one reference site. The
reference site is heathland located near the training site, where no military actions took place.
At all disturbed sites, bulk density and pH proved to be higher than on the reference site.
Relative to the reference site, SOC storage reached from 37 to 91 per cent, regeneration of Nt
was slightly lower. In contrast to the advanced development of SOC and Nt, the regeneration
of Cmic and Nmic was much lower (15–44 per cent). The succession site showed a low pool of
SOC, Nt, Cmic and Nmic, but microbial ratios indicated a less disturbed C- and N-cycle. AcP
pronounced differences in nutrient demand between disturbed sites and reference. On this
base, recommendations for restoration management were given.