长江源区布曲流域土壤有机碳分布特征及其影响因素
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张超飞, 马素萍, 何晓波, 汪少勇
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Distribution characteristics and influencing factors of soil organic carbon in Buqu catchment in the source region of the Yangtze River， China
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Chaofei ZHANG, Suping MA, Xiaobo HE, Shaoyong WANG
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表2 土壤其他化学性质变化特征（平均值±标准差）
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Table 2 Soil chemical properties variables in different soil layers （average ± standard deviation）
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土壤 化学性质 | 土壤剖面深度/cm |
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| 0~10 | 10~20 | 20~30 | 30~40 | 40~50 | 50~100 |
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| pH值 | 7.45±0.53b | 7.55±0.45ab | 7.59±0.35ab | 7.65±0.40ab | 7.66±0.40ab | 7.70±0.37a | | 全氮/g·kg-1 | 0.85±0.21ab | 0.89±0.23a | 0.82±0.20abc | 0.72±0.16c | 0.75±0.20bc | 0.75±0.23bc | | 碳氮比 | 12.35±6.14a | 11.64±6.20a | 11.87±7.59a | 12.86±6.80a | 11.58±7.93a | 12.96±6.99a | | 全钾/g·kg-1 | 9.79±2.22a | 9.60±2.16a | 10.10±2.04a | 10.33±2.71a | 10.19±2.35a | 10.08±1.95a | | 全磷/g·kg-1 | 0.50±0.14a | 0.50±0.09a | 0.46±0.09a | 0.48±0.13a | 0.47±0.12a | 0.47±0.12a | | 阳离子交换量/cmol·kg-1 | 8.67±3.42a | 8.12±3.21a | 7.90±3.51a | 7.11±2.97a | 7.05±3.35a | 7.85±3.29a | | 无机碳/g·kg-1 | 14.65±3.96a | 14.60±4.37a | 16.44±6.65a | 17.52±6.18a | 16.35±6.17a | 16.51±4.98a |
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