Zuo Xueyan, Cui Lijuan, Li Wei, Lei Yinru, Dou Zhiguo, Liu Zhijun, Cai Yang, Zhai Xiajie
Institute of Wetland Research, Chinese Academy of Forestry, Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China.
Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China.
Plants (Basel). 2020 Dec 23;10(1):13. doi: 10.3390/plants10010013.
Carbon, nitrogen, and phosphorus-nutrient and restrictive elements for plant growth and important components of the plant body-are mainly transferred and exchanged between plants and the soil environment. Changes in the carbon, nitrogen, and phosphorus eco-stoichiometry greatly impact the growth and expansion of , and understanding these changes can reveal the nutrient coordination mechanism among ecosystem components. To explore the relationship between leaf and soil eco-stoichiometry and determine the key soil factors that affect leaf eco-stoichiometry, we collected leaf and soil samples of at different tidal levels (i.e., 1, 3, and 5 km away from the coastline) in a coastal wetland in the Yancheng Elk Nature Reserve, Jiangsu province. We measured the leaf and soil carbon, nitrogen, and phosphorus contents and ratios, as well as the soil salinity and soil organic carbon. The results revealed the following. (1) The leaf stoichiometric characteristics and soil properties of differed significantly between tidal levels; for example, total carbon, nitrogen, soil organic carbon were detected at their highest levels at 3 km and lowest levels at 5 km. (2) Significant correlations were detected between the leaf stoichiometric characteristics and soil characteristics. Additionally, nitrogen limitation was evident in the study area, as indicated by the nitrogen-phosphorus ratio being less than 14 and the soil nitrogen-phosphorus ratio being less than 1. (3) Soil salinity and the soil carbon-nitrogen ratio were shown to be the key factors that affect the eco-stoichiometric characteristics of . These findings furthered our understanding of the nutrient distribution mechanisms and invasion strategy of and can thus be used to guide control policies formulated by government management departments in China.
碳、氮和磷是植物生长的营养和限制元素，也是植物体的重要组成部分，它们主要在植物与土壤环境之间进行转移和交换。碳、氮和磷生态化学计量的变化对[植物名称]的生长和扩张有很大影响，了解这些变化可以揭示生态系统各组成部分之间的养分协调机制。为了探究叶片与土壤生态化学计量之间的关系，并确定影响叶片生态化学计量的关键土壤因素，我们在江苏省盐城麋鹿自然保护区的一个滨海湿地，采集了不同潮位（即距离海岸线1、3和5千米处）的[植物名称]叶片和土壤样本。我们测量了叶片和土壤中的碳、氮、磷含量及比率，以及土壤盐分和土壤有机碳。结果如下：（1）不同潮位下[植物名称]的叶片化学计量特征和土壤性质存在显著差异；例如，总碳、氮、土壤有机碳在3千米处检测到最高水平，在5千米处检测到最低水平。（2）叶片化学计量特征与土壤特征之间存在显著相关性。此外，研究区域明显存在氮限制，氮磷比小于14且土壤氮磷比小于1表明了这一点。（3）土壤盐分和土壤碳氮比被证明是影响[植物名称]生态化学计量特征的关键因素。这些发现进一步加深了我们对[植物名称]养分分布机制和入侵策略的理解，因此可用于指导中国政府管理部门制定的[植物名称]控制政策。
