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| 河南省土壤有机碳储量及影响因素 |
| Soil Organic Carbon Storage and Its Influencing Factors in Henan |
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| DOI： |
| 中文关键词: 土壤有机碳 碳储量 碳密度 气候因素 土地利用类型 河南省 |
| 英文关键词: Soil organic carbon Carbon storage Carbon density Climatic factor Land use type Henan Province |
| 基金项目:国家自然科学基金资助项目（32271848） |
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| 中文摘要: |
| 将河南省划分为东西部12个林区8种土地利用类型，基于810个点位的现场采样测量，估算该省土壤有机碳（SOC）储量，计算土壤有机碳密度（SOCD）并分析其影响因素。结果表明，河南省0cm～100cm土层SOC储量为1 46782 Tg，平均SOCD为965kg/m3，与我国SOCD平均水平（960kg/m3）相持平；研究区西部和东部平均SOCD分别为1012kg/m3和900kg/m3，森林与耕地面积占比不同可能是导致东西部SOCD差异的重要因素；研究区内森林、耕地、草地和人造地表的面积占比，以及气候因素包括归一化植被指数（NDVI）、干旱指数、年平均气温、年平均降水量、湿度指数均对SOC储量有显著影响。 |
| 英文摘要: |
| Henan Province was divided into 12 forest regions and 8 land use types from east to west， and 810 sampling sites were set up for field detection Soil organic carbon（SOC）storage was estimated， soil organic carbon density（SOCD） was calculated， and the influencing factors were studiedResults showed that SOC storage in 0cm～100cm soil layer was 1 46782 Tg， and the average SOCD was 965kg/m3， which was similar to the national average SOCD（960kg/m3） The average SOCD in the west and east of the study area was 1012kg/m3 and 900kg/m3， respectively The difference in area proportion of forest and cultivated land might be an important factor for the difference in SOCD between east and west The area proportion of forest， cultivated land， grassland， and artificial surface in the study area， as well as climatic factors including normalized differential vegetation index（NDVI）， aridity index， annual average temperature， annual average precipitation and humidity index had significant impacts on SOC storage. |
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