中文摘要：

采用网袋法,对武夷山风景名胜区4种天然林凋落物分解特征进行1年的研究。结果表明：①各林分总的失重率大小顺序为：阔叶林叶（63.1%）〉毛竹叶（60.2%）〉杉木叶（51.6%）〉阔叶枝（45.6%）〉杉木枝（39.2%）〉毛竹枝（39.3%）〉马尾松叶（36.7%）〉马尾松枝（25.3%）。②4种林分凋落物的分解系数k大小为：阔叶林叶（0.996 a^-1）〉毛竹叶（0.921 a^-1）〉杉木叶（0.725 a^-1）〉阔叶枝（0.608 a^-1）〉毛竹枝（0.499 a^-1）〉杉木枝（0.497 a^-1）〉马尾松叶（0.457 a^-1）〉马尾松枝（0.305 a^-1）。③8种凋落物的有机C浓度总体上平缓逐渐减少,阔叶林和毛竹林的有机C损失比重高于马尾松林和杉木林;P处于波动的富集状态,毛竹林的P归还量较其他天然林低;N浓度变化趋势差异较大,阔叶林叶的分解最多,大部分组分分解后期出现富集现象;除阔叶枝外,其他凋落物组分的K浓度随着分解时间的增加单调递减趋势,属淋溶一释放模式。该研究旨在了解这4种亚热带天然林的生态系统功能、养分分解规律、土壤肥力状况等,为武夷山风景名胜区天然林的保护和管理提供科学依据。

英文摘要：

The nylon bag method was adopted to make a one-year observation of the decomposition of four natural forests litter in Wuyishan Scenery District.The results showed that the weightlessness ratio of four natural forests could be ranked in a decreasing order,that is,broadleaf leaf litter（63.1%） 〉Phyllostachys heterocycla cv.Pubescens leaf litter（60.2%）〉 Chinese fir leaf litter（51.6%）〉 broadleaf twig litter（45.6%）〉 Chinese fir twig litter（39.3%） 〉Phyllostachys pubescens twig litter（39.2%） 〉Pinus massoniana leaf litter（36.7%）〉 Pinus massoniana twig litter（25.3%）.The order of decomposition concentration（K values） of the four forest types was broadleaf leaf litter（0.996 a^-1） Phyllostachys pubescens leaf litter（0.921 a^-1）〉 Chinese fir leaf litter（0.725 a^-1）〉 broadleaf twig litter（0.608 a^-1）〉 Phyllostachys pubescens twig litter（0.499 a^-1）〉 Chinese fir twig litter（0.497 a^-1） Pinus massoniana leaf litter（0.457 a^-1） 〉Pinus massoniana twig litter（0.305 a^-1〉）.The organic C concentration of 8 kinds of litters decreased gently and gradually in general,and the loss proportion of the organic C of broadleaved forest and Phyllostachys heterocycla forest was higher than that of Pinus massoniana and Cunninghamia lanceolata forest.The content of P was in a fluctuating state of enrichment,and the P returning amount of Phyllostachys heterocycla was lower than that of other natural forests.The changing tendency of N concentration differed greatly,and the leaf decomposing rate of the broadleaved forests was the highest,most of whose composition was enriched in the later period.Except the branches of broadleaved trees,K concentration of all other litters decreased monotonously with the passage of decomposing time,which falls into leaching-release mode.The study aimed to discover the ecosystem function,nutrient decomposition rule,soil fertility condition of the four kinds of sub-tropical natural forest,providing scientific basis for protecti