文献类型：期刊文献

英文题名：Effects of Long-Term Fertilization and Stand Age on Root Nutrient Acquisition and Leaf Nutrient Resorption of Metasequoia glyptostroboides

作者：Song, Rui[1,2] Tong, Ran[2] Zhang, Hui[3] Wang, G. Geoff[4] Wu, Tonggui[2] Yang, Xiuqing[1]

第一作者：Song, Rui

通信作者：Yang, XQ[1];Wu, TG[2]

机构：[1]Shanxi Agr Univ, Coll Forestry, Taigu, Peoples R China;[2]Res Inst Subtrop Forestry, Chinese Acad Forestry, East China Coastal Forest Ecosyst Long term Res St, Hangzhou, Peoples R China;[3]Zhejiang A&F Univ, Forestry & Biotechnol Coll, Hangzhou, Peoples R China;[4]Clemson Univ, Dept Forestry & Environm Conservat, Clemson, SC USA

年份：2022

卷号：13

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000800036000001)】；

基金：Funding This work was supported by the Fundamental Research Funds for National Natural Science Foundation of China (31770756).

语种：英文

外文关键词：nutrient acquisition strategies; N and P fertilization; stand age; leaf; root

摘要：The plant nutrient acquisition strategies are diverse, such as root nutrient acquisition and leaf nutrient resorption, playing important roles in driving soil processes, vegetation performance as well as ecosystem nutrient cycling. However, it is still in a debate whether there is a synergy or tradeoff between above- and below-ground nutrient acquisition strategy under nitrogen (N) and phosphorus (P) addition, or with stand age. Herein, this study investigated the responses of root-soil accumulation factor (RSAF) and leaf nutrient resorption efficiency (NuRE) to long-term N and P fertilization, and further explored the trade-off between them in Metasequoia glyptostroboides plantations with different stand age. Results showed that under N fertilization in young plantations, leaf N resorption efficiency (NRE) increased, and root-soil accumulation factor for P (RSAF-P) decreased. For young forests under P fertilization, the NRE increased whereas RSAF-P decreased. For middle-aged forests under P fertilization, the NRE and leaf P resorption efficiency (PRE) increased and the RSAF-P decreased. Under P fertilization in young and middle-aged plantations, PRE had a significant positive correlation with RSAF-P. Under N fertilization in young plantations, NRE was significantly positive correlated with root-soil accumulation factor for N (RSAF-N). The covariance-based structural equation modeling (CB-SEM) analysis indicated that stand age had positive effects on PRE whether under N or P fertilization, as well as on RSAF-P under N fertilization, whereas had no effects on the NRE or RSAF-N. Overall, our results can shed light on the nutrient acquisition strategies of M. glyptostroboides plantations under future environmental changes and the results could be applied to the nutrient management practices.