江西农业大学学报2025，Vol.47Issue(3)：659-670,12.DOI:10.3724/aauj.2025057
亚热带次生林甜槠和拟赤杨不同分解程度叶凋落物混合分解动态研究
Dynamics of mixed leaf litter decomposition with different decomposition degrees of Castanopsis eyrei and Alniphyllum fortunei in a subtropical secondary forest
摘要
Abstract
[Objective]This study aims to explore the dynamic mechanism of litter mixed decomposition of evergreen tree species and deciduous tree species in subtropical evergreen broad-leaved forest,thus revealing the interaction between the mixed decomposition process of litter with different decomposition degrees.[Method]This study used the method of litter decomposition bags and selected the Castanopsis eyeri and the Alniphyllum fortunei from the Guanshan sample plot to analyze the mass loss rate and nutrient changes of individual and mixed decomposition,and evaluate the mixing effect during the decomposition process.[Result]Firstly,at the different stages of the decomposition process,the decomposition of Pseudoalder aldermatus(AFT)was significantly affected by the different degrees of decomposition,including undercomposed UCEE and semi-decomposed SCEE.Secondly,at the 45th week of decomposition,the mass residue rate of AFT UCEE(70.36%)was significantly higher than that of AFT SCEE(55.64%),while the mass residue rate of AFT SCEE was not significantly different from that of AFT SCEE(56.01%).The nutrient residue rates of organic carbon(51.84%),total nitrogen(89.57%)and total phosphorus(83.85%)were significantly higher than those of organic carbon(38.33%),total nitrogen(77.91%)and total phosphorus(73.65%)treated by AFT SCEE,respectively,and organic carbon(43.17%),total nitrogen(78.58%)and total phosphorus(72.14%)treated with AFT alone.[Conclusion]In the process of mixed decomposition,the leaf litter of the Castanopsis eyeri had a certain inhibitory effect on the decomposition of the leaf litter of the Alniphyllum fortunei,and the inhibition effect of undecomposed Castanopsis eyeri was stronger.关键词
亚热带常绿阔叶林/凋落物分解/甜槠/拟赤杨/混合分解Key words
subtropical evergreen broad-leaved forest/litter decomposition/Castanopsis eyeri/Alniphyllum fortunei/mixed decomposition分类
农业科技引用本文复制引用
高建新,黄冬梅,刘骏,兰勇,龚雨,周天玲,赖礼萍,郑崇龙,徐定兰,宋庆妮,杨清培..亚热带次生林甜槠和拟赤杨不同分解程度叶凋落物混合分解动态研究[J].江西农业大学学报,2025,47(3):659-670,12.基金项目
国家自然科学基金项目(42067050)和江西"千人计划"引进类创新领军人才长期青年项目(jxsq2020101079)Project supported by the National Natural Science Foundation of China(42067050)and Jiangxi"Thousand Tal-ents Plan"Introduction of Innovative Leading Talent Long-term Youth Project(jxsq2020101079) （42067050）
