碳氮同位素结合稳定同位素模型解析沉积土壤碳源
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李娜,孙占祥,张燕卿,刘恩科,李凤鸣,李纯乾,李菲
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Contribution of Carbon Sources in Sedimentary Soils Combining Carbon and Nitrogen Isotope with Stable Isotope Model
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LI Na,SUN ZhanXiang,ZHANG YanQing,LIU EnKe,LI FengMing,LI ChunQian,LI Fei
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表2 不同土地利用类型及沉积物同位素特征值
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Table 2 Different land use types and sediments of isotopic characteristic values
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土地利用类型
Land use type | 土壤有机碳
SOC (g·kg-1) | 土壤总氮
TN (g·kg-1) | 碳同位素比值
δ13C (‰) | 氮同位素比值
δ15N (‰) | 碳氮比
C/N ratio | | 林地 Forest | 16.86±0.06a | 2.33±0.06a | -24.9±0.25a | 1.25±0.06d | 7.24bc | | 耕地Cropland | 7.35±0.04b | 0.52±0.04c | -23.85±0.43b | 3.05±0.05ab | 14.14a | | 草地Grassland | 6.43±0.09b | 0.86±0.09bc | -19.2±0.25c | 2.63±0.03c | 7.48b | | 沟谷Gully | 4.21±0.07c | 0.65±0.02c | -24.9±0.4a | 3.65±0.02a | 6.48c | | 沉积物 Sediments | 5.79±0.05abc | 0.40±0.09c | -25.2±0.3ab | 2.92±0.02c | 14.48a |
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