文献类型：期刊文献

英文题名：Effects of phosphorus resorption on bioactive phosphorus of different-aged Pinus massoniana plantations

作者：Xue, Xupeng[1,2] Ge, Xiaogai[1,2,3] Lei, Lei[4] Zhou, Benzhi[1,2] Li, Mai-He[3,5,6]

第一作者：Xue, Xupeng

通信作者：Ge, XG[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[2]Natl Forestry & Grassland Adm, Qianjiangyuan Forest Ecosyst Res Stn, Hangzhou 311400, Peoples R China;[3]Swiss Fed Inst Forest Snow & Landscape Res WSL, Zuercherstr 111, CH-8903 Birmensdorf, Switzerland;[4]Chinese Acad Forestry, Ecol & Nat Conservat Inst, Beijing 100091, Peoples R China;[5]Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun 130024, Peoples R China;[6]Hebei Univ, Coll Life Sci, Baoding 071000, Peoples R China

年份：2024

卷号：11

外文期刊名：FOREST ECOSYSTEMS

收录：;Scopus(收录号：2-s2.0-85202462308);WOS:【SCI-EXPANDED(收录号:WOS:001318267400001)】；

基金：This study was supported by the Fundamental Research Funds for the Central Non-profit Research Institution (CAFYBB2021QD002-2 and CAFYBB2020ZE001) , the National Key Research and Development Program of China (2023YFD2200404-02) , and the Qianjiangyuan National Forest Ecological Research Station.

语种：英文

外文关键词：Organ phosphorus components; Phosphorus cycling; Phosphorus resorption; Stand age

摘要：Phosphorus (P) is an important nutrient element in the photosynthesis process of plants. The effect of stand age on P nutrient dynamics in subtropical plantations is unclear. In this study, the mechanisms of above- and belowground P cycling in subtropical P. massoniana plantations of different stand ages (5, 9, 19, 29 and 35 years) were investigated. The percentage of metabolic P in leaves exhibited an initial rise and subsequent decline with stand age of P. massoniana throughout the growing season, culminating in a metabolic P proportion of 34%-68% in litter. During the non-growing season, the main change in the P components of P. massoniana fine roots was a transition from metabolic P to residual P. Relative to during the growing season, soil ligand P fractions decreased by 7%-22% and exchangeable P fractions increased by 0-16% in the non-growing season. Organ P components tended to decrease with increasing stand age, mainly due to the gradual decrease in soil-bioavailable P, a trend alleviated by litter input. The generation of dissolved P by soil phosphatases would limit the reduction in soilbioavailable P caused by leaf P resorption to some extent. The differences in leaf organ P components between the growing and non-growing seasons are attributed to the allocation of P by the P. massoniana. Overall, the results of this study provide a basis for exploring the mechanisms of soil bioavailable P and soil P enzymemediated organ P component allocation in P. massoniana forests. These findings will help improve the management of P-limited P. massoniana plantations to enhance their productivity.