木兰溪源保护区典型米槠群落凋落物动态特征  

Litterfall Dynamics of Typical Castanopsis carlesii Community in Mulanxi Source Nature Reserve

作　　者：张建和 

机构地区：[1]福建省仙游县林业局,福建仙游351200

出　　处：《福建林业科技》2016年第2期32-35,48,共5页Journal of Fujian Forestry Science and Technology

基　　金：福建省自然科学基金项目(B0110025)

摘　　要：以福建木兰溪源自然保护区内分布最广泛的米槠-柃木-芒萁群丛为对象,对米槠次生林群落凋落物的数量、组成动态进行研究。结果表明,2013年和2014年米槠群落共向林地输入凋落物14927.8 kg·hm^(-2),其中叶占64.87%,枝占16.53%,花占0.09%,果占0.12%,其它树种凋落物、杂物分别占7.26%、11.13%;米槠年凋落量在5406.2~6776.4 kg·hm^(-2)之间,占总凋落量的80.79%~82.27%,表现为典型的米槠优势群落。总凋落量年际变化较小,2014年米槠群落总凋落量是2013年的1.23倍,月动态变化呈双峰型,主峰出现在4月,次峰出现在8月。凋落物的平均含水率在16.6%~65.5%之间。In year 2013 and year 2014, a set of experiments were conducted to investigate the litter production, component and climatic factor monthly dynamics in a secondary forest of Castanopsis carlesii-Eurya muricata-Dicranopteris dichotoma community, located in Mulanxi source nature reserve in Xianyou of Fujian Province. The results showed that about 14927.8 kg · hm^-2 litter production was returned to the soil, in which 64. 87% , 16. 53% ,0. 09% ,0. 12% were occupied by leaves, branches, flower, fruit, and 7.26%, 11.13% were occupied by other tree litters and other litters respectively. Anual litter production of Castanopsis carlesii varied from 5406. 2 kg · hm^-2 to 6776.4 kg · hm^-2 ,occupied 80.79% to 82. 27% of total litter production,which showed that the community was dominance by Castanopsis carlesii. Total litter production slightly changed in two years, the value in 2014 year was 1.23 times as higher as that of 2013 year, and monthly dynamics of litter production showed as double peak type in both years,which peaked at Apill or August ,with the highest production in April. The moisture content of litter were fluetuant between 16. 6% and 65.5%.

关 键 词：米槠 次生林 凋落物 凋落量 木兰溪源保护区 

分 类 号：S718.556[农业科学—林学] S759.93