| 山东省土壤有机碳密度的空间分布特征及其影响因素 |
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| 引用本文： | 代杰瑞,庞绪贵,曾宪东,王红晋. 山东省土壤有机碳密度的空间分布特征及其影响因素[J]. 环境科学研究, 2015, 28(9): 1449-1458 |
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| 作者姓名： | 代杰瑞 庞绪贵 曾宪东 王红晋 |
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| 作者单位： | 山东省地质调查院, 山东 济南 250013 |
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| 基金项目： | 国家国土资源大调查基金项目(1212010310306)；山东省国土资源大调查基金项目(2006709) |
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| 摘 要： | 利用2010年完成的山东省多目标区域地球化学调查获得的双层网格化大密度、高精度土壤碳数据,估算了全省土壤表层(0～20 cm)、中上层(0～100 cm)和全层(0～160 cm)的土壤有机碳(SOC)密度及其储量,并分析不同土壤类型、地貌类型、土地利用类型下土壤有机碳密度及其储量的空间分布特征及影响因素. 结果表明:①山东省不同深度土壤碳库组成存在一定差异,其中表层土壤碳库以有机碳为主,而全层土壤碳库则以无机碳为主. ②全省表层土壤有机碳储量为350.65×106 t,平均土壤有机碳密度为2.22 kg/m2,但在不同土壤类型、地貌类型和土地利用类型之间差异显著. ③土壤中较高的w(黏粒)、w(Se)、w(TN)和稳定的C/N等土壤条件均可促使w(SOC)增加,而土壤盐渍化、高硅、富盐基离子的沙性土壤环境则不利于有机碳的积累；此外,人类活动对林地、草地的破坏,以及灌溉水田、园地、林地等土地利用方式的改变也会导致土壤有机碳流失；土壤有机碳积累受降水量影响明显,随多年平均降水量的增加而增大,但受气温影响不明显. 在各因素综合影响下,山东省表层土壤有机碳密度分布呈沿海低、鲁西北平原和胶莱盆地中等、鲁中南山地丘陵和中低山区偏高的分布特征.
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| 关 键 词： | 土壤有机碳储量 有机碳密度 分布特征 影响因素 山东省 |
Soil Carbon Density and Distribution and Influencing Factors in Shandong Province |
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| DAI Jierui,PANG Xugui,ZENG Xiandong and WANG Hongjin. Soil Carbon Density and Distribution and Influencing Factors in Shandong Province[J]. Research of Environmental Sciences, 2015, 28(9): 1449-1458 |
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| Authors: | DAI Jierui PANG Xugui ZENG Xiandong WANG Hongjin |
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| Affiliation: | Shandong Institute of Geological Survey, Jinan 250013, China |
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| Abstract: | Abstract: Based on a double grid, large density and high accuracy soil carbon data obtained from a multi-target regional geochemical survey in 2010, SOC (soil organic carbon) density and storage of soils in three layers including surface layer from 0-20 cm, middle-upper layer from 0-100 cm and deep layer from 0-160 cm in Shandong Province were estimated. Meanwhile, the spatial distribution of SOC storage and density and its influencing factors were determined based on classification of soil types, land patterns and landscape types. The conclusions were as follows:1) The carbon storage composition of the three soil layers is different. The soil carbon storage of surface soil 0-20 cm is mainly SOC, whereas deep layer 0-160 cm is mainly SIC. 2) The SOC storage and density of surface soils in Shandong Province are 350.65×106 t and 2.22 kg/m2, respectively, and the values show great differences among soil types, landscape types and land use patterns. 3) Higher w(clay), w(Se), w(TN) and stable C/N ratio in soil could contribute to the increase of SOC content. In contrast, soil salinization, alkaline calcium-rich and high-sodium silica sand soil environment were not conducive to the accumulation of SOC. Besides, artificial destruction of woodland and grassland and the change of land use patterns also contributed to the loss of SOC. SOC was also significantly affected by amount of precipitation; SOC increased with the increase of rainfall; however, the effect of temperature was not obvious. Under the combined effect of various factors, surface SOC density distribution in Shandong Province is low in coastal area, medium in northwest plain of Shandong Province and Jiaolai Basin, and high in hills, middle and lower mountains. |
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| Keywords: | soil organic carbon storage organic carbon density distribution influencing factors Shandong Province |
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