College of Agriculture, Ningxia University, Yinchuan 750021, China.
Ningxia Wuzhong National Agricultural Science and Technology Park Management Committee, Wuzhong 751100, Ningxia, China.
Ying Yong Sheng Tai Xue Bao. 2023 Mar;34(3):664-670. doi: 10.13287/j.1001-9332.202303.006.
To explore the stoichiometric characteristics of C, N and P and adaptive mechanism of mosses in mountain forest ecosystems, we set up 15 plots along the altitude gradient in forest in Helan Mountains, Ningxia. We analyzed the C:N:P stoichiometry of moss aboveground tissues and its relationship with environmental factors. The results showed the mean values of C, N and P concentration in moss aboveground tissues were 336.67, 20.31 and 0.66 mg·g, respectively. The mean value of aboveground tissue N:P was 33.4, indicating that the growth of mosses was limited by P. The C concentration in the aboveground tissues of mosses was positively correlated with soil total nitrogen concentration and negatively correlated with soil total phosphorus concentration. The N concentration in aboveground tissues of mosses was significantly negatively correlated with soil organic carbon and soil total nitrogen concentrations. Results of redundancy analysis showed that the interpretation rate of environmental factors on the stoichiometry was 48.5%, with canopy closure, soil total nitrogen and soil total phosphorus as the main factors. Canopy closure was the main environmental factor affecting the growth of mosses in forest in Helan Mountains. High canopy closure facilitated the growth of mosses.
为了探究山地森林生态系统中苔藓植物的碳氮磷化学计量特征及其适应机制，我们沿宁夏贺兰山森林海拔梯度设置了 15 个样地。分析了苔藓地上组织的碳氮磷化学计量特征及其与环境因子的关系。结果表明，苔藓地上组织的碳、氮、磷浓度平均值分别为 336.67、20.31 和 0.66mg·g-1，地上组织氮磷比的平均值为 33.4，表明苔藓的生长受到磷的限制。苔藓地上组织的碳浓度与土壤全氮浓度呈正相关，与土壤全磷浓度呈负相关。苔藓地上组织氮浓度与土壤有机碳和土壤全氮浓度呈显著负相关。冗余分析结果表明，环境因子对化学计量特征的解释率为 48.5%，其中林冠郁闭度、土壤全氮和土壤全磷是主要因子。林冠郁闭度是影响贺兰山森林苔藓生长的主要环境因素。高林冠郁闭度有利于苔藓的生长。
