Effects of Single Chinese Fir and Mixed Leaf Litters on Soil Chemical, Microbial Properties and Soil Enzyme Activities |
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Authors: | Y L Hu S L Wang D H Zeng |
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Institution: | (1) Huitong Experimental Station of Forest Ecology, Institute of Applied of Ecology, Chinese Academy of Sciences, 110016 Shenyang, China;(2) Center for Forest Ecology and Eco-engineering, Institute of Applied of Ecology, Chinese Academy of Sciences, 110016 Shenyang, China |
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Abstract: | The quality of leaf litter can control decomposition processes and affect the nutrient availability for plant uptake. In this
study, we investigated the effect of single leaf litter (Chinese fir – Cunninghamia lamcealata (Lamb.) Hook) and mixed leaf litters (C. lamcealata, Liquidamba formosana Hance and Alnus cremastogyne Burk) on soil chemical properties, soil microbial properties and soil enzyme activities during 2 years decomposition. The
results showed that soil microbial biomass C, the ratio of soil microbial biomass C to total soil organic C (soil microbial
quotient, Cmic/Corg) and soil enzymes (urease, invertase, dehydrogenase) activities increased significantly in mixed leaf
litters treatments whereas soil chemical properties remained unchanged. However, soil microbial metabolic quotient (qCO2) values and soil polyphenol oxidase activity were higher in the single Chinese fir leaf litter treatment that had a higher
C:N (carbon:nitrogen) ratio (79.53) compared with the mixed leaf litter (C:N ratios of 76.32, 56.90, 61.20, respectively).
Our results demonstrated that the mixed leaf litter can improve forest soil quality, and that soil microbial properties and
soil enzyme activities are more sensitive in response to litter quality change than soil chemical properties. |
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Keywords: | Chinese fir mixed leaf litters soil enzyme activities soil microbial properties |
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