详细信息
北亚热带6种森林类型凋落物分解过程中有机碳动态变化 被引量:28
Carbon Dynamics of Litter Decomposition in Six Forest Stands of Subtropical China
文献类型:期刊文献
中文题名:北亚热带6种森林类型凋落物分解过程中有机碳动态变化
英文题名:Carbon Dynamics of Litter Decomposition in Six Forest Stands of Subtropical China
作者:李正才[1] 徐德应[2] 杨校生[1] 傅懋毅[1] 孙雪忠[3] 奚金荣[3]
第一作者:李正才
机构:[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400;[2]中国林业科学研究院森林生态环境与保护研究所,北京100091;[3]浙江省富阳市林业局,浙江富阳311400
年份:2008
卷号:21
期号:5
起止页码:675-680
中文期刊名:林业科学研究
外文期刊名:Forest Research
收录:CSTPCD;;Scopus;北大核心:【北大核心2004】;CSCD:【CSCD2011_2012】;
基金:浙江省自然科学基金项目(Y507684);国际合作项目(CPR/00/G33/A/1G/99)部分研究内容
语种:中文
中文关键词:森林凋落物;凋落物分解;有机碳分解;土地利用方式
外文关键词:forest litter ; litter decomposition ; release of organic carbon ; land-use pattern
分类号:S718.55
摘要:运用凋落物野外分解模拟实验的方法,对北亚热带地区6种主要森林类型凋落物分解过程中有机碳的变化进行了研究,结果表明:(1)6种土地利用类型森林凋落物分解过程中,有机碳相对含量在分解初始阶段都呈现增加的趋势,表现为凋落物有机碳相对含量的积累过程;分解开始的第3~4个月后,凋落物有机碳相对含量下降;经过1a的分解周期以后,粗放经营毛竹林凋落物有机碳相对含量变化最大,下降11.7%;(2)集约经营毛竹林凋落物有机碳数量从分解开始就减少,而其它几种类型分解初期有机碳数量都表现一个净积累的过程,然后才逐步释放;经过1a分解周期以后,粗放经营毛竹林凋落物53.8%的有机碳净释放;凋落物有机碳释放速率由高到低的顺序为:粗放经营毛竹林、早竹林、杉木林、天然次生林、集约经营毛竹林、马尾松林;(3)6种土地利用类型森林凋落物在分解过程中,有机碳剩余率随时间变化的模型都极其显著地符合分解指数模型,因此都可以用指数方程表达;(4)影响凋落物分解的环境因子所发挥的作用不尽相同,凋落物的分解速率和温度之间呈现显著的正相关关系。
Based on the field study, this paper deals with carbon dynamics of litter decomposition in six land-use types of forests in the subtropical area of south China. The results showed that: (1) at the beginning of the decomposition, the carbon content in litter increased, indicating the accumulation process of carbon; later, the carbon content decreased, while after one year of decomposition, the carbon content of that in the Phyllostachys edulis extensively managed stand was reduced by 11.7% ; (2) the carbon quantity of litter in the Phyllostachys edulis stand decreased from the beginning, while those for the others increased first and then decreased; after one year, the carbon quantity of the extensively managed Ph. edulis stand decreased by 53.8% ; the release rate of carbon from the highest to lowest was ranked as follows: the extensively managed Ph. edulis stand, Ph. praecox stand, Cunninghamia lanceolata stand, the intensively managed Ph. edulis stands and Pinus massoniana; (3) the remaining carbon amount of forest litter could be described by exponential equation models; (4) the decomposition rate of litter was positively correlated with air temperature.
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