城市化对珠江三角洲存留常绿阔叶林土壤有机碳组分及其碳库管理指数的影响

发布时间：2018-12-19 19:25

【摘要】：通过对珠江三角洲城区(植物园、白云山、帽峰山)和郊区(鹤山、从化石门、鼎湖山)存留的6个常绿阔叶林进行调查,分析城市化对存留森林土壤有机碳组分和碳库管理指数的影响。在选择的样地按0—10,10—20cm分层采集土壤样品,并测定土壤总有机碳(TOC)、易氧化有机碳(ROC)和不易氧化有机碳(NROC)。结果表明:(1)城区森林土壤的TOC、ROC和NROC含量显著低于郊区(P0.05)。(2)在0—10cm层次,城区森林土壤碳库的活度和活度指数显著高于郊区(P0.05);在10—20cm,城区森林土壤碳库的活度和活度指数也高于郊区,但差异不显著。(3)在0—10,10—20cm,郊区森林土壤的碳库指数和碳库管理指数显著高于城市森林(P0.05)。城市化导致存留常绿阔叶林土壤有机碳活性增加,但不利于土壤总有机碳积累。
[Abstract]:A survey of 6 evergreen broadleaved forests in urban areas of the Pearl River Delta (Botanical Garden, Baiyun Mountain, Maofeng Mountain) and suburbs (Heshan, Conghua Shimen, Dinghu Mountain) was carried out. The effects of urbanization on soil organic carbon composition and carbon pool management index were analyzed. Soil samples were collected from 0-10 ~ (-20) cm soil samples on selected sample plots, and (ROC) and (NROC). Were determined for total organic carbon (TOC),) and non-oxidized organic carbon (NROC). The results showed that: (1) the content of TOC,ROC and NROC in urban forest soil was significantly lower than that in suburb (P0.05). (2), and the activity and activity index of carbon pool in urban forest soil was significantly higher than that in suburb (P0.05). At 10-20 cm, the activity and activity index of forest soil in urban area was also higher than that in suburb, but the difference was not significant. (3) at 0-10 ~ 10 ~ 20 cm, the carbon pool index and management index of forest soil in suburb were significantly higher than those in urban forest (P0.05). Urbanization resulted in the increase of soil organic carbon activity in the remaining evergreen broadleaved forest, but it was not conducive to the accumulation of total organic carbon in the soil.
【作者单位】：广州大学地理科学学院;华南农业大学资源环境学院;
【基金】：广州市属高校科技计划项目(1201430746) 国家自然科学基金项目(31400415) 广东省普通高校青年创新人才项目(2014KQNCX110)
【分类号】：S714.2

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