文献类型：期刊文献

中文题名：Intraspecific variations in fine root N and P and factors affecting their concentrations in Masson pine plantations across subtropical China

作者：Zunji Jian[1,2] Jin Xu[1] Yanyan Ni[3] Lei Lei[1,2] Lixiong Zeng[1,2] Wenfa Xiao[1,2]

第一作者：Zunji Jian

机构：[1]Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Beijing 100091,People’s Republic of China;[2]Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,Jiangsu,People’s Republic of China;[3]Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,Hubei,People’s Republic of China

年份：2023

卷号：34

期号：5

起止页码：1463-1473

中文期刊名：林业研究:英文版

外文期刊名：Journal of Forestry Research

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：funded by the National Key Research and Development Program of China (Grant Number 2016YFD0600201)。

语种：英文

中文关键词：Fine root;Chemical traits;Environmental variables;Pinus massoniana;Subtropical China

分类号：F42

摘要：Fine roots(<2 mm)play vital roles in water and nutrient uptake.However,intraspecific variations in their chemical traits and their controlling mechanisms remain poorly understood at a regional scale.This study examined these intraspecific variations in fine roots in Masson pine(Pinus massoniana Lamb.)plantations across subtropical China and their responses to environmental factors.Root nitrogen(N)and phosphorus(P)concentrations and their mass ratios(N:P)ranged from 3.5 to 11.7 g kg^(-1),0.2 to0.9 g kg^(-1),and 7.8 to 51.6 g kg^(-1),respectively.These three chemical traits were significantly different between sites and in longitudinal patterns across subtropical China.Mean annual temperature was positively related to root N concentration but negatively related to root P concentration.There were significant,negative relationships between clay content and root P concentration and between pH and root N concentration.Available N had no significant relationship with root N concentration,while available P was a significantly positive relationship with root P concentration.The combined effects of altitude,climate(temperature and precipitation)and soil properties(pH,clay content,available N and P)explained 26%and 36%of the root N and P concentrations variations,respectively.These environmental variables had direct and indirect effects and exhibited disproportionate levels of total effects on root N and P concentrations.Root N and P concentrations explained 35%and 65%variations in their mass ratios,respectively.The results highlight different spatial patterns of chemical traits and various environmental controls on root N and P concentrations in these ecosystems.More cause-effect relationships of root chemical traits with abiotic and biotic factors are needed to understand nutrient uptake strategies and the mechanisms controlling intraspecific variations in plant traits.