柠条（ Caragana korshinskii ）固沙林恢复过程中表层土壤有机碳累积特征及其驱动机制

许正强, 王兴东, 万仲武, 王瑞霞, 杨学龙

Accumulation characteristics and driving mechanisms of topsoil organic carbon during the restoration of Caragana korshinskii sand-fixing shrublands

Zhengqiang Xu, Xingdong Wang, Zhongwu Wan, Ruixia Wang, Xuelong Yang

表1 不同恢复年限土壤化学计量特征

Table 1 Soil ecological stoichiometric characteristics across different restoration year

土壤化学计量特征 恢复年限/a 0 15 28 54 70 土壤碳氮比C∶N 3.86±0.67c 5.83±0.87c 7.94±0.47b 10.11±0.43a 10.10±0.89a 土壤碳磷比C∶P 2.29±0.32c 6.06±0.47c 9.59±1.31b 25.72±1.14a 29.73±2.80a 土壤氮磷比N∶P 0.61±0.02b 1.17±0.24b 1.23±0.20b 2.55±0.12a 2.97±0.27a