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10.4314/ejst.v12i3.4Keywords:
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Main Article Content
Effect of thinning on biophysical soil properties of Cupressus lusitanica stand in Munessa forest, Ethiopia
Abstract
Forest management practices such as thinning can dramatically change the microenvironment and thereby affect the physicochemical and soil microbiological properties. The aim of this research was to determine the effect of thinning on soil physicochemical properties and microbial biomass under Cupressus lusitanica plantation at Munessa forest. The experiment was carried out in a fenced stand treated differently (thinned and unthinned plots) with a completely randomized design. In each plot, 20 sampling spots were randomly selected for soil sample collection from 0 to 10 cm and 10 to 25 cm depth. Independent t-test was used to compare effects of thinning on biophysical properties of the soil. Results showed that soil organic carbon (SOC) and total nitrogen varied significantly between treatments. SOC concentration was generally lower at the soil depth of 0-10 to 10-25 cm. The concentrations of microbial biomarker used as a proxy for microbial biomass assessment were 22% larger in thinned stands. Soils under the thinned stand contained larger concentration of arbuscular mycorrhizal fungi biomarker. The two forest stands were established at the same time with the same stocking and hence differences in soil quality could be possibly resulted from management intervention. These findings showed that Cupressus thinning could enhance biomass accumulation and organic C input to the soil.
