文献类型：期刊文献

中文题名：南亚热带常绿阔叶林土壤碳氮磷生态化学计量年际动态及稳态分析:基于10年连续观测

英文题名：Interannual dynamics and homeostasis of soil carbon, nitrogen, and phosphorus stoichiometry in a subtropical evergreen broad-leaved forest: Based on ten years observation

作者：付志高[1] 肖以华[1] 许涵[1] 史欣[1] 罗汉东[2] 贲春丽[1] 杨紫浓[1] 李明[1]

第一作者：付志高

机构：[1]中国林业科学研究院热带林业研究所,广州510520;[2]梅州市地质环境监测站,广东梅州514071

年份：2025

卷号：44

期号：1

起止页码：1-10

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划项目(2022YFF1303003-06);中央级公益性科研院所基本科研业务费专项资金(CAFYBB2021SY004);广东省科技厅林业生态监测网络平台建设(2022CG646);广东珠江三角洲森林生态系统国家定位观测研究站项目(0144135)资助。

语种：中文

中文关键词：常绿阔叶林;土壤碳氮磷;生态化学计量;环境因子;稳定性

外文关键词：evergreen broad?leaved forest;soil organic carbon,nitrogen and phosphorus;ecological stoichiometry;enviromental factor;homeostasis

分类号：TM9

摘要：阐明土壤碳氮磷生态化学计量及动态特征有助于理解森林土壤养分贮存、供应能力和养分限制状况,并对生态系统修复与保护具有重要指导意义。本研究以南亚热带常绿阔叶林土壤为对象,在连续10年监测土壤有机碳(SOC)、全氮(TN)、全磷(TP)、pH值、土壤温度(ST)、土壤含水量(SWC)、月平均降雨量(MAP)、空气温度(MAT)和空气湿度(MAH)等指标基础上,运用方差分析、相关性、冗余、方差分解和多重线性回归分析等方法探究土壤碳氮磷含量、化学计量的年际变化特征、稳定性及主要环境影响因子。结果表明:(1)旱季,SOC、TN和TP含量分别达15.37~21.21、1.19~2.03和0.08~0.14 g·kg^(-1),且年际间均呈现极显著差异(P<0.01);雨季,此3指标则分别为24.44~28.50、1.76~2.32和0.17~0.22 g·kg^(-1),年际间仅TP含量呈现显著差异(P<0.05)。雨季C∶N极显著高于旱季(P<0.01),而C∶P和N∶P则是旱季极显著高于雨季(P<0.01)。(2)旱季,TN与ST呈显著正相关,TP与MAH呈极显著正相关,而N∶P与MAH呈显著负相关;雨季,环境因子和土壤碳氮磷含量及其化学计量比相关性不显著。总体而言,环境因子对于TN(解释率23%)的影响小于TP(68%)和SOC(53%),且TN更易受pH影响(独立效应1%);N∶P对环境变化响应(32%)强于C∶N(14%)和C∶P(23%)。(3)旱季,MAT(重要值28.9%)、ST(重要值61.2%)和MAH(重要值46.2%)分别是影响土壤碳氮磷含量的主导因子;雨季,影响SOC(87.5%)和TN(48.8%)含量的主导因子为MAT,TP则主要受MAH(31.27%)影响。(4)年际稳定性表现为N∶P>TP>C∶P>SOC>C∶N>TN,SOC(40.0%)和TP(47.5%)稳定性主要受MAP影响,TN(47.9%)则是受ST影响。综上所述,旱季水分限制导致土壤碳氮磷含量在年际间显著变化;环境因子对TP的影响效应远大于土壤SOC和TN,且温度是影响土壤碳氮磷含量的主要环境因子;SOC和TP年际稳定性主要受降雨影响,TN则受温度驱动。
Clarifying ecological stoichiometry and dynamic characteristics of soil carbon, nitrogen and phosphorus helps to understand nutrient storage, supply capacity and nutrient limitation in forest soils, and provide important guidance for ecosystem restoration and conservation. Soil organic carbon(SOC), total nitrogen(TN), total phosphorus(TP), pH value, soil temperature(ST), soil water content(SWC), mean annual precipitation(MAP), temperature(MAT) and humidity(MAH) of a subtropical evergreen broad-leaved forest were quantified for ten years. Analysis of variance, correlation, redundancy, variance decomposition and multiple linear regression analysis were used to explore the interannual variations and stability of soil organic carbon, total nitrogen and phosphorus, as well as their stoichiometric ratios and the effects of environmental factors. The results showed that the contents of SOC, TN, and TP were 15.37-21.21, 1.19-2.03, and 0.08-0.14 g·kg^(-1) in the dry season, respectively, with great interannual variations(P<0.01). In the rainy season, the contents of SOC, TN, and TP were 24.44-28.50, 1.76-2.32, and 0.17-0.22 g·kg^(-1), respectively, with great interannual variations of TP content(P<0.05). The ratio of C∶N was significantly higher in the rainy season than that in the dry season(P<0.01), while the ratios of C∶P and N∶P were significantly higher in the dry season than that in the rainy season(P<0.01).(2) In the dry season, TN was significantly positively correlated with ST, TP was significantly positively correlated with MAH, while N∶P ratio was significantly negatively associated with MAH. However, there were no significant correlations between environmental factors and SOC, TN and TP, and ecological stoichiometry in the rainy season. Overall, environmental factors had less effect on TN(interpretation rate 23%) than on TP(68%) and SOC(53%), and TN was more susceptible to pH(independent effect 1%). N∶P was more responsive to environmental change(32%) than C∶N(14%) and C∶P(23%).(3) In the dry season, MAT(general dominance value 28.9%), ST(61.2%), and MAH(46.2%) were the dominant factors affecting SOC, TN, and TP content, respectively. Nevertheless, MAT was the dominant factor affecting SOC(87.5%) and TN(48.8%), but MAH(31.27%) was the key factor driving TP in the wet season.(4) The trend of interannual stability was as follows: N∶P>TP>C∶P>SOC>C∶N>TN. Moreover, the stability of SOC(40.0%) and TP(47.5%) was affected by MAP, while that of TN(47.9%) was affected by ST. In summary, the interannual variations of SOC, TN and TP contents were significantly affected by soil moisture limitation in the dry season, and the effect of environmental factors on TP was greater than on SOC and TN. Furthermore, temperature was the dominant environmental factor affecting SOC, TN and TP contents. The interannual stability of SOC and TP was mainly influenced by rainfall, while that of TN was driven by temperature.