| 陕北黄土区不同林地土壤有机碳含量研究 |
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| 引用本文： | 苟清平,朱清科,梅雪梅,王雪峰,吕东唯.陕北黄土区不同林地土壤有机碳含量研究[J].安徽农业大学学报,2023,50(3):490. |
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| 作者姓名： | 苟清平 朱清科 梅雪梅 王雪峰 吕东唯 |
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| 作者单位： | 北京林业大学水土保持学院，北京 100083;北京林业大学水土保持学院，北京 100083; 林业生态工程教育部工程研究中心，北京 100083;郑州大学生态与环境学院，郑州 450001 |
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| 基金项目： | “十三五”国家重点研发计划课题（2016YFC05017702）资助。 |
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| 摘 要： | 为探究黄土高原植被恢复对深层土壤碳库的影响，选取退耕还林第一县陕北吴起县金佛坪流域5种植被恢复类型（山杏林（Armeniaca sibrica），油松林（Pinus tabulaeformis）、沙棘林（Hippophae rhamnoides）、刺槐林（Robinia pseudoacacia）、小叶杨林（Populus simonii））和以自然恢复为主的荒草地为研究对象，通过调查0～1 000 cm土层土壤有机碳含量，并计算土壤有机碳储量，分析不同植被类型的土壤有机碳剖面分布和差异。结果表明：在总体上，土壤有机碳在0～60 cm出现快速下降，60～1 000 cm出现不明显的波动变化，其中40～260 cm土层，小叶杨林地土壤有机碳含量明显最高。不同植被恢复都具有固碳效益，且不同植被土壤有机碳含量差异显著（P＜0.05）。不同植被土壤有机碳储量：小叶杨（18年）（301.51 t·hm-2）＞刺槐（19 年）（249.86 t·hm-2）＞沙棘（18年）（242.14 t·hm-2）＞山杏（8年）（226.08 t·hm-2）＞油松（5年）（182.91 t·hm-2）＞荒草地（160.45 t·hm-2），这可能是由于不同树龄和植被类型导致的结果。深层（100～1 000 cm）土壤有机碳储量占0～1 000 cm剖面有机碳储量的73%～84%。深层土壤有机碳含量颇丰，在今后碳汇评估中不容忽视。
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| 关 键 词： | 陕北黄土区 深层土壤有机碳 深层碳储量 植被恢复 固碳 |
Study on the soil organic carbon content of different vegetation types in loess region of Northern Shaanxi Province, China |
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| GOU Qingping,ZHU Qingke,MEI Xuemei,WANG Xuefeng,LYU Dongwei.Study on the soil organic carbon content of different vegetation types in loess region of Northern Shaanxi Province, China[J].Journal of Anhui Agricultural University,2023,50(3):490. |
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| Authors: | GOU Qingping ZHU Qingke MEI Xuemei WANG Xuefeng LYU Dongwei |
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| Institution: | Soil and Water Conservation School of Beijing Forestry University, Beijing 100083;Soil and Water Conservation School of Beijing Forestry University, Beijing 100083; Engineering Research Center of Forestry Ecological Engineering, Ministry of Education, Beijing Forestry University, Beijing 100083;School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001 |
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| Abstract: | To investigate the effect of vegetation restoration on deep soil carbon pools in the Loess Plateau, five different vegetation restoration types (Armeniaca sibirica, Pinus tabuliformis, Robinia pseudoacacia, Populus simonii and Hippophae rhamnoides) and natural restoration-based barren grassland were selected from Jinfoping watershed of Wuqi county, Northern Shaanxi. The distribution and differences of soil organic carbon profiles under different vegetation restoration types were analyzed by investigating the soil organic carbon content in 0 - 1 000 cm soil layer and calculating the soil organic carbon storage. The results showed that: in general, soil organic carbon decreased rapidly in 0 - 60 cm and an insignificant fluctuating change from 60 - 1 000 cm, with the highest soil organic carbon content evident in 40 - 260 cm soil layer, in P. simonii forestland. There were significant differences in soil organic matter content among different vegetation restoration (P < 0.05). Soil organic carbon storage of different vegetation types: P. simonii (18 years) (301.51 t·hm-2) > R. pseudoacacia (19 years) (249.86 t·hm-2) >H. rhamnoides (18 years) (242.14 t·hm-2) >A. sibirica (8 years) (226.08 t·hm-2)>P. tabuliformis (5 years) (182.91 t·hm-2) >Grassland (160.45 t·hm-2), which may be the results of different tree ages and vegetation types. Soil organic carbon storage of deep layer (100 - 1 000 cm) accounted for 73% - 84% of organic carbon storage of 0-1 000 cm profile. The content of organic carbon in deep soil is abundant, which should not be ignored in the future carbon sink assessment. |
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| Keywords: | in loess region of Northern Shaanxi Province deep soil organic carbon deep soil organic storage vegetation restoration carbon sequestration |
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