摘要
在我国南方林区,杉木人工林多代连栽造成的林地生产力衰退已成为制约其可持续发展的突出难题。杉木根系残落物作为森林凋落物的重要组成成分,其腐败、分解过程中产生的化感物质对杉木种子、幼苗生长发育造成显著影响,严重制约了杉木人工林的营造与更新,还极大地干扰了土壤生物群落多样性,致使土壤生态平衡失调,对林地生态系统影响深远,是导致杉木人工林土壤肥力日渐下降的重要因素之一。文中通过梳理杉木根系残落物中化感物质的种类、释放途径及其影响因素,剖析其对杉木种子萌发、幼苗生长发育及林分生长的影响规律,进一步归纳总结其对土壤动物、微生物等生物群落多样性的影响,并对杉木根系残落物的未来研究方向进行展望。
The decline of forestland productivity caused by continuous planting of Chinese fir plantations in southern forest areas has been a prominent problem restricting its sustainable development.Chinese fir root residues is an important component of forest litters,and the allelopathic substances generated in the process of the residues decay and decomposition have a significant impact on growth of Chinese fir seeds and seedlings,which seriously restricts the establishment and renewal of Chinese fir plantations.The substances greatly interfere with the diversity of soil biological communities,breaking the soil ecological balance and imposing a profound impact on forest ecosystems.It is one of the important factors that lead to the decreasing soil fertility in Chinese fir plantations.The paper reviews the types,release pathways and influencing factors of allelopathic substances in root residues of Chinese fir,analyzes the patterns how the substances influence seed germination,seedling growth and stand growth of Chinese fir,and further summarizes their influence on the diversity of biological communities such as soil animals and microorganisms.At the end,the prospect of the future research direction is discussed.
作者
钱奕
马祥庆
田云龙
周丽丽
李林鑫
吴鹏飞
Qian Yi;Ma Xiangqing;Tian Yunlong;Zhou Lili;Li Linxin;Wu Pengfei(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,China;National Forestry Grassland Engineering and Technology Research Center of Chinese Fir,Fuzhou 350002,China;Fujian Provincial EngineeringResearch Center for Sustainable Management of Artificial Forests,Fuzhou 350002,China;College of Geography and Oceanography,Minjiang University,Fuzhou 350108,China)
出处
《世界林业研究》
北大核心
2025年第2期25-31,共7页
World Forestry Research
基金
福建省自然科学基金重点项目“丛枝菌根网络对异质低磷环境杉木邻间关系的影响机制”(2024J02010)
福建农林大学科技创新专项基金项目“钙调素对低磷胁迫下杉木根系生长的影响机理”(KFB23051)。
关键词
杉木
根系残落物
化感物质
土壤微生物
土壤动物
Chinese fir
root residue
allelopathic substance
soil microorganisms
soil animal
