山核桃林集约经营过程中土壤有机碳和微生物功能多样性的变化

应用生态学报

山核桃林集约经营过程中土壤有机碳和微生物功能多样性的变化

吴家森^1,2,钱进芳³,童志鹏⁴,黄坚钦²,赵科理^1**

(¹浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室, 浙江临安 311300; ²浙江农林大学亚热带森林培育国家重点实验室培育基地, 浙江临安 311300; ³淳安县林业局, 浙江淳安 311700; ^4临安市林业局, 浙江临安 311300)

出版日期:2014-09-18 发布日期:2014-09-18

Changes in soil organic carbon and soil microbial functional diversity of Carya cathayensis plantations under intensive managements.

WU Jia-sen^1,2, QIAN Jin-fang³, TONG Zhi-peng⁴, HUANG Jian-qin², ZHAO Ke-li¹

(¹Zhejiang Province Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Lin’an 311300, Zhejiang, China; ²Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an 311300, Zhejiang, China; ^3Chun’an Forestry Bureau, Chun’an 311700, Zhejiang, China; ⁴Lin’an Forestry Bureau, Lin’an 311300, Zhejiang, China)

Online:2014-09-18 Published:2014-09-18

摘要/Abstract

摘要：

研究集约经营时间为5、10、15、20 a山核桃林的土壤有机碳和微生物功能多样性的演变规律.结果表明: 天然混交林改造为山核桃纯林并经强度经营后,林地土壤有机碳(TOC)、微生物生物量碳(MBC)、水溶性有机碳(WSOC)含量显著下降,但有机碳库的稳定性增强.与天然山核桃阔叶混交林(0 a)相比,经过5 a的强度经营,TOC、MBC、WSOC含量分别下降28.4%、34.1%和53.3%,20 a后分别下降38.6%、48.9%和64.1%,土壤有机碳组分中的芳香碳、酚基碳和羰基碳比例提高,芳香度提高了23.0%.山核桃的强度经营降低了土壤微生物功能多样性,0、5 a与10、15、20 a土壤微生物活性的平均颜色变化率(AWCD)值差异显著,Shannon指数(H)和均匀度指数(E)在0、5 a与15、20 a间差异显著.林地土壤TOC、WSOC、MBC、AWCD、H和E等6个指标两两之间均显著相关.

Abstract:

The change characteristics of soil organic carbon and microbial function diversity in Chinese hickory Carya cathayensis stands with different intensivemanagement durations (5, 10, 15 and 20 years) were studied. The results showed that soil total organic carbon (TOC), microbial biomass carbon (MBC), watersoluble organic carbon (WSOC) decreased significantly, while the stability of soil C pool increased significantly after the conversion from evergreen and deciduous broadleaf forest to intensivelymanaged forest (IMF)．TOC, MBC and WSOC in the hickory forest soil decreased by 28.4%, 34.1% and 53.3% with 5-year intensive management, and by 38.6%, 48.9% and 64.1% with 20year intensive management, respectively. The proportions of carboxyl C, phenolic C and aromatic C in the hickory forest soil all increased significantly, and the aromaticity of soil organic C increased by 23.0%. Soil microbial functional diversity decreased greatly after intensive management of Chinese hickory forest. Significant differences in average well color development (AWCD) were found between the 0- and 5-year treatments and the 10-, 15- and 20-year treatments. The microbial diversity indexes (H) and evenness indexes (E) in the 0- and 5-year treatments were much greater than in the 10- and 20-year treatments. Correlation analysis showed that there were significant correlations among soil TOC, WSOC, MBC, AWCD, H and E.

吴家森1,2,钱进芳3,童志鹏4,黄坚钦2,赵科理1**. 山核桃林集约经营过程中土壤有机碳和微生物功能多样性的变化[J]. 应用生态学报.

WU Jia-sen1,2, QIAN Jin-fang3, TONG Zhi-peng4, HUANG Jian-qin2, ZHAO Ke-li1. Changes in soil organic carbon and soil microbial functional diversity of Carya cathayensis plantations under intensive managements.[J]. Chinese Journal of Applied Ecology.