林业科学研究2025，Vol.38Issue(3)：72-82,11.DOI:10.12403/j.1001-1498.20240244
穿透水量减少对马尾松、油茶及其混合凋落叶分解的影响
Effect of Throughfall Reduction on the Decomposition of Pinus massoniana,Camellia oleifolia,and Their Mixed Leaf Litter
摘要
Abstract
[Objective]This study aimed to explore the effects of precipitation reduction on leaf litter decom-position of tree and shrub species and their mixed litter in south China.[Methods]In Pinus massoniana and Camellia oleifolia mixed forest,three kinds of penetration reduction intensity treatments were set up:blank control(CK),throughfall reduction by 30%(R30)and throughfall reduction by 60%(R60),and the field decomposition bag experiment was carried out for 18 months.The decomposition and structural car-bohydrate degradation dynamics of three leaf litter types of leaf litter-P.massoniana litter,C.oleifolia litter and a mixed litter in equal proportions were monitored.[Results](1)Both R30 and R60 treatments signific-antly increased the litter mass remaining ratio and decreased the decomposition constant(k)of P.masso-niana(p<0.05).In contrast,only the R60 treatment significantly increased the litter mass remaining ratio of C.oleifolia and the mixed leaf litter(p<0.05).(2)The R30 and R60 treatments significantly increased the remaining ratio of lignin and cellulose during the P.massoniana litter decomposition(p<0.05),while only R60 treatment increased the remaining ratio of lignin and cellulose during the C.oleifolia litter decom-position(p<0.05).(3)Correlation analysis indicated a positive linear relationship between the litter mass remaining ratio and the remaining of lignin and cellulose(p<0.05).[Conclusion]The throughfall reduction inhibited the decomposition of P.massoniana,C.oleifolia,and their mixed leaf litter,leading to a de-creased degradation of structural carbohydrates.The inhibitory effect was influenced by both the type of lit-ter and the intensity of throughfall reduction.These findings provide theoretical basis for the rational man-agement of litter in mixed P.massoniana and C.oleifolia forests under precipitation reduction.关键词
减雨/马尾松林/凋落叶分解/质量损失/结构性碳水化合物Key words
precipitation reduction/Pinus massoniana forest/leaf litter decomposition/mass loss/structural carbohydrates分类
农业科技引用本文复制引用
郭艳,铁烈华,丁贵杰..穿透水量减少对马尾松、油茶及其混合凋落叶分解的影响[J].林业科学研究,2025,38(3):72-82,11.基金项目
贵州省科技计划项目(黔科合基础-ZK[2022]101) （黔科合基础-ZK[2022]101）
贵州省科技重大专项项目,马尾松优异种质资源挖掘与创新利用,黔科合重大专项字[2024]010 （）
贵州省全省重点高原山地林木培育重点实验室(黔科合平台人才[2025]025) （黔科合平台人才[2025]025）
