文献类型：期刊文献

中文题名：近自然化改造对马尾松人工林土壤有机碳化学组分的影响

英文题名：Effects of close-to-nature transformation on chemical compositions of soil organic carbon in Pinus massoniana plantations

作者：闵惠琳[1,2,3] 明安刚[1,2,3] 舒韦维[1,2,3] 李华[1,2,3] 杨坤[1] 张继辉[4] 陶怡[1] 李忠国[1,2,3] 曾冀[1] 邓小冉[1] 黄定武[1]

第一作者：闵惠琳

机构：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600;[2]广西友谊关森林生态系统定位观测研究站,广西凭祥532600;[3]崇左凭祥友谊关森林生态系统广西野外科学观测研究站,广西凭祥532600;[4]广西壮族自治区林业科学研究院,广西南宁530002

年份：2025

卷号：45

期号：9

起止页码：151-158

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：;北大核心:【北大核心2023】；

基金：“十四五”国家重点研发计划课题(2023YFE0105100-04,2021YFD2200405);国家自然科学基金项目(32071764);广西自然科学基金项目(2020GXNSFAA297208)。

语种：中文

中文关键词：近自然化改造;土壤有机碳化学组分;南亚热带;马尾松人工林

外文关键词：close-to-nature transformation;chemical compositions of SOC;south subtropical zone;Pinus massoniana plantation

分类号：S718.554.1

摘要：【目的】通过研究近自然化改造对马尾松人工林土壤有机碳化学组成和稳定性的影响,探明近自然化改造对马尾松人工林土壤有机碳的影响机制,为马尾松人工林可持续经营与提质增效提供科学依据。【方法】以南亚热带马尾松近自然化改造林(CN)及未实施近自然化改造的马尾松纯林(CK)为研究对象,采用固态13C核磁共振波谱技术分析土壤有机碳化学组分,同时测定土壤理化性质、微生物生物量碳、氮及微生物群落多样性。【结果】1)近自然化改造显著降低了土壤有效磷(AP)和土壤全磷(TP)含量,对其他土壤理化性质无显著影响;2)近自然改造显著增加了土壤微生物生物量碳(MBC)及微生物生物量碳/氮(MBC/MBN),显著降低了真菌Shannon指数,对土壤微生物生物量氮(MBN)及其他微生物α多样性指数无显著影响;3)近自然化改造林和对照林土壤有机碳均以氧烷基碳占比最大(46%~49%),羰基碳占比最小(9%~12%),近自然化改造显著增加了土壤烷基碳比例和烷基碳/氧烷基碳,显著降低了芳香碳/烷基碳,对其他有机碳化学组分无显著影响;4)TP、MBC/MBN,以及真菌Shannon指数是影响土壤有机碳化学组成及其稳定性的主要因素。【结论】近自然化改造增强了马尾松人工林土壤有机碳的化学抵抗性,有助于提高土壤有机碳库的稳定性。
【Objective】To study the dominant factors of the chemical composition and stability of soil organic carbon in the close-tonature Pinus massoniana plantations,and to provide a scientific basis for the sustainable management and quality improvement of Pinus massoniana plantations,the mechanism of the impact of near-naturalization on soil organic carbon in Pinus massoniana plantations was clarified.【Method】Solid-state 13C nuclear magnetic resonance(NMR)spectroscopy was utilized to analyze the chemical composition of SOC in CNT of Pinus massoniana plantation(CN)and Pinus massoniana plantation(CK),soil physical and chemical properties,soil microbial biomass carbon and nitrogen and community composition were measured.【Result】The results showed that:1)close-to-nature transformation significantly increased soil available phosphorus and total phosphorus,but had no effect on other soil physicochemical properties;2)close-to-nature transformation significantly reduced soil microbial biomass carbon and C/N,but significantly increased fungal Shannon index,had no effect on soil microbial biomass nitrogen and other microbial alpha diversity index;3)In both CNT and CK,the O-alkyl C accounts for the largest proportion(46%-49%),while the carbonyl C accounts for the smallest proportion(9%-12%).Close-to-nature transformation significantly reduced the soil alkyl C,alkyl C/O-alkyl C,but significantly increased the aromatic C/alkyl C,CNT had no effect on other chemical compositions of soil organic carbon;4)Total phosphorus,microbial biomass C/N and fungal Shannon index are the main factors influencing chemical compositions of SOC.【Conclusion】Close-to-nature transformation enhanced SOC chemical resistance and stability,which helps to enhance the stability of the soil organic carbon pool.