The activities of enzymes related to carbon cycle in Liu-Kuei forest soils
| Autor: | Chien-Chih Lee, 李建志 |
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| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 A Taiwania plantation (N 23˚00΄13˝ E 120˚42΄25˝) and a native hardwood forest, mainly Lauraceae and Fagaceae (N 22˚59΄57˝ E 120˚42΄33˝) in Liu-Kuei, Taiwan were selected to measure the activities of soil enzymes related to carbon cycle and to examine the relations between the enzyme activities and soil properties, especially soil organic carbon, and the seasonal changes in soil organic carbon content and the enzyme activities. The results showed that soil β-glucosidase activities in the Taiwania plantation and native hardwood forests were 1.20-3.06 (average: 2.03 ± 0.79) and 3.54-5.49 (average: 4.18 ± 0.73) μmol p-nitrophenol g-1soil h-1, respectively; soil β-glucosaminidase activities in the Taiwania plantation and native hardwood forests were 1.50-1.86 (average: 1.67 ± 0.13) and 1.95-4.37 (average: 3.00 ± 0.93) μmol p-nitrophenol g-1soil h-1, respectively; and soil cellulase activities in the Taiwania plantation and native hardwood forests were 0.0945-0.332 (average: 0.24 ± 0.08) and 0.399-0.821 (average: 0.62 ± 0.15) μmol glucose g-1soil 24 h-1, respectively. There were no significant seasonal changes in the soil carbon content and the above soil enzyme activities, but all of them significantly decreased with soil depth increased (P < 0.05). The results of simple regression analysis indicated that soil β-glucosidase, β-glucosaminidase, and cellulase activities significantly correlated with microbial biomass C, microbial biomass N, total nitrogen and soil organic carbon (P < 0.001). Soil β-glucosaminidase, cellulose activities, microbial biomass C and N significantly correlated with soil moisture (P < 0.05). The estimated percentages of the total soil organic carbon amounts to the forest carbon sinks were 61 % and 47 % for the Taiwania plantation and native hardwood forests in Liu-Kuei, respectively. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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