文献类型：期刊文献

英文题名：Leaf nitrogen and phosphorus stoichiometry of the halophytes across China

作者：Tong, Ran[1] Ma, Cong[1] Lou, Chenyang[1] Yuan, Wenwen[1] Zhu, Nianfu[1] Wang, G. Geoff[2] Wu, Tonggui[1]

第一作者：童冉

通信作者：Tong, R[1];Wu, TG[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, East China Coastal Forest Ecosyst Long Term Res St, Hangzhou, Peoples R China;[2]Clemson Univ, Dept Forestry & Environm Conservat, Clemson, SC USA

年份：2023

卷号：14

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;Scopus(收录号：2-s2.0-85174597999);WOS:【SCI-EXPANDED(收录号:WOS:001085425700001)】；

基金：This study was supported by Key Research and Development Plan of Zhejiang Province (2021C02038). We would like to acknowledge the work carried out by the researchers whose published data were used in this integration analysis.

语种：英文

外文关键词：ecosystem type; growth form; halophyte; scaling relationship; stoichiometry

摘要：Halophytes play a crucial role in the ecological restoration of saline and alkaline land and hold promising benefits to food security in China. Although a variety of aspects of halophytes have been extensively addressed, there is still a lack of overall understanding of the leaf nitrogen (N) and phosphorus (P) stoichiometric characteristics, especially at a national scale. We compiled a national dataset of 311 observations from 113 sampling sites across China to explore the changing trends and influencing factors on leaf N and P concentrations, and N:P ratio of halophytes. The results showed that leaf N concentration decreased significantly with increasing latitude (LAT), which was mainly driven by the mean annual temperature (MAT) and mean annual precipitation (MAP). The leaf P concentration increased remarkably with increasing longitude (LON), which was induced by the variation in soil total P (TP) content. The leaf N:P ratio increased as LAT increased and LON decreased, which was potentially regulated by the MAT, MAP, and soil TP content. The scaling exponents of the N-P relationship differed significantly among halophyte types and were 0.40, 0.87, and 1.39 for euhalophyte, pseudohalophyte, and recretohalophyte, respectively. The leaf N concentration exhibited significant differences among ecosystem types and halophyte types, whereas the leaf P concentration and N:P ratio remained relatively stable. In summary, the leaf N concentration and N-P scaling exponent might be the classification criteria for halophyte types from the perspective of plant nutrient resource allocation. Moreover, this study characterized the spatial distribution and allocation strategy of leaf N and P stoichiometry in halophytes by data integration analysis, providing the basic information for nutrient management in the processes of the future domestication and introduction of halophytes.