不同树种更新对马尾松采伐迹地凋落物及土壤化学计量特征的影响  

Effects of Regeneration of Different Tree Species on Stoichiometric Characteristics of Litter and Soil in Pinus massoniana Logging Site

作　　者：傅成杰 应宇馨 高伟 巫智斌 Fu Chengjie;Ying Yuxin;Gao Wei;Wu Zhibin(Institute of Forest Ecology and Carbon Sink Measurement,Fujian Forestry Vocational and Technical College,Nanping 353000,China)

机构地区：[1]福建林业职业技术学院森林生态与碳汇计量研究所,福建南平353000

出　　处：《防护林科技》2025年第2期17-20,共4页Protection Forest Science and Technology

基　　金：南平市自然科学基金项目“闽江(延平段)沿岸马尾松低质低效林改造效益研究”(N2021J014);福建省林业科学研究项目“基于碳汇功能提升的针叶人工林提质增效研究”(2023FKJ31)。

摘　　要：探明采用不同营林树种对马尾松林改造更新后的养分平衡机理,可为亚热带人工林造林树种选择和养分调控提供理论依据。以在马尾松人工林采伐迹地上栽植的马尾松、杉木及木荷人工林为研究对象,分析林地转换后对凋落物和土壤化学计量特性影响。结果表明:马尾松林转换为木荷林可提高凋落物分解速率和土壤有机碳及有效磷质量分数;转换为杉木人工林,土壤碳磷比(C/P)、碳氮比(C/N)及有效磷显著上升;连作马尾松时,凋落物总碳(TC)、土壤有机碳、碱解氮显著增加,凋落物C/N和氮磷比(N/P)下降;林地转换后马尾松和木荷受氮(N)元素的影响,杉木则受磷(P)的限制。与马尾松林相比,转换为木荷林加快了凋落物分解速率,提高了有机碳质量分数;转换为马尾松和杉木则提高了土壤TC、TN质量分数。Exploring the mechanism of nutrient balance after the transformation and renewal of Pinus massoniana forest by different forest species can provide a theoretical basis for tree species selection and nutrient regulation of subtropical plantation afforestation.The effects of forest land conversion on litter and soil stoichiometric characteristics were analyzed by taking Pinus massoniana,Cunninghamia lanceolata and Schima superba plantations planted on the logging site of Pinus massoniana plantation as the research objects.The results showed as follows:the conversion of Pinus massoniana forest to Schima superba forest counld increase litter decomposition rate as well asthe content of soil organic carbon and available phosphorus;the conversion to Cunninghamia lanceolata plantation significantly increased soil carbon-phosphorus ratio(C/P),carbon-nitrogen ratio(C/N)and available phosphorus;the total carbon(TC),soil organic carbon and alkali-hydrolyzable nitrogen of litter increased significantly,and the C/N and nitrogen-phosphorus ratio(N/P)of litter decreased under continuous cropping of Pinus massoniana;Pinus massoniana and Schima superba were affected by nitrogen(N)element after forest land conversion,while Cunninghamia lanceolata was limited by phosphorus(P)element.Compared with Pinus massoniana forest,the conversion to Schima superba forest accelerated the litter decomposition rate and increased the mass fraction of organic carbon.The conversion to Pinus massoniana and Cunninghamia lanceolata increased the content of TC and TN in soil.

关 键 词：人工林 松林改造 养分循环 马尾松 杉木 木荷 

分 类 号：S718.55[农业科学—林学] S719.248.06