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Impacts of changes in land use/cover on soil microbial and enzyme activities

Author:
Moghimian, Negar  Hosseini, Seyed Mohsen  Kooch, Yahya  Darki, Behrouz Zarei  


Journal:
CATENA


Issue Date:
2017


Abstract(summary):

Microbial and enzyme activities are increasingly being recognized as sensitive indicators of soil quality. This study aims to determine the impacts of different kinds of land use/cover, i.e. virgin natural forest (VNF), degraded natural forest (DNF), alder plantation (AP), sequoia plantation (SP), improved fallow (IF) and home garden (HG) areas on soil properties in northern Iran. Five composed samples per land use/cover were taken from the top 10 cm of the soil. Soil microbial respiration was found to be in the ranked order of AP > VNF > HG > DNF > IF approximate to SP areas, being more than one-and-a-half-fold under AP compared with SP. The values of microbial biomass carbon were almost two times higher under SP approximate to VNF than under IF approximate to HG areas. Microbial biomass nitrogen was found to be significantly higher under AP approximate to VNF than in the other kinds of land covers. AP approximate to VNF significantly increased the activities of urease and acid phosphatase, whereas greater activities of invertase occurred in AP approximate to VNF approximate to SP sites. Arylsulphatase activity was significantly higher to be significantly higher under AP in comparison with VNF > HG > DNF > SP > IF areas. As a conclusion, alder (Alnus subcordata C. A. Mey.) plantation improved the soil quality to levels similar to natural forest ecosystems. This research recommends the preservation of natural forests to increase soil quality and a plantation with suitable native broad-leaved species and forestation plan management to rehabilitate degraded natural forests.


Page:
407---414


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