西双版纳不同林茶复合生态系统碳储量  

Carbon storage of different tree-tea agroforestry systems in Xishuangbanna,Yunnan Province of Southwest China

作　　者：萧自位[1,2] 王丽娟[1,2] 毛加梅[3] 朱兴正[3] 王小李[4] 郑丽[4] 唐建维[1] 

机构地区：[1]中国科学院西双版纳热带植物园热带植物资源开放实验室,云南勐腊666303 [2]中国科学院研究生院,北京100049 [3]云南省农业科学院茶叶研究所,云南勐海666201 [4]云南省科学技术情报研究院,昆明650051

出　　处：《生态学杂志》2012年第7期1617-1625,共9页Chinese Journal of Ecology

基　　金：中国科学院农业项目办公室项目(KSCX2-YW-N-48-06);西双版纳州科技局项目(YX200902)资助

摘　　要：为了探明上层遮荫树种对茶园碳储量的影响,根据所建立的茶园上层树种及茶树的生物量模型估算了不同林茶复合生态系统的生物量,结合植物、土壤样品碳含量的实测值,对西双版纳州勐海县4种茶园组合模式及纯茶园的碳储量进行了分析。结果表明:樟树+茶、樟-杉+茶2种组合模式的碳储量分别比纯茶园碳储量(223.442t·hm-2)高22.701、3.871t·hm-2,而4种遮荫树种+茶、6种遮荫树种+茶2种组合模式的碳储量则分别比纯茶园低10.828、5.717t·hm-2。各茶园总碳储量以土壤的碳储量所占比例最大,达91.8%～96.0%,随上层树种数量的增加而降低,并在4种遮荫树种+茶组合模式达到最低;而植物体的碳储量仅占总碳储量的4.0%～8.2%,呈现随上层树种数量增加而先增加后降低的趋势。表明西双版纳的人工茶园复合态系统具有很强的碳储存能力。In order to understand the effects of shade tree species on the carbon storage of different tree-tea agroforestry systems,three plots with a size of 20 m × 25 m were established in each of five different tea gardens,i.e.,a monoculture tea garden and four tea gardens with one,two,four,and six shade tree species,respectively in Menghai County,Xishuangbanna.Biomass regression models were constructed by using the DBH of shade trees and the BD（basal diameter） of tea shrubs,soil samples were taken from five layers（0-20,20-40,40-60,60-80,and 80-100 cm） in each plot,and the carbon storage was then estimated,based on the carbon contents in different organs of trees and tea shrubs and in soils.The total carbon storage of monoculture tea garden（223.442 t·hm-2） was 22.701 and 3.871 t·hm-2 lower than that of the Cinnamomum pathenoxylum-tea and Cinnamomum pathenoxylum＋Cunninghamia lanceolata-tea gardens,but 10.828 and 5.717 t·hm-2 higher than that of the tea gardens with four and six shade tree species,respectively.Soil carbon storage accounted for 91.8%-96.0% of the total carbon storage,being the lowest in the tea garden with four shade tree species.The carbon storage of plants only occupied 4.0%-8.2% of the total carbon storage,and increased from the tea gardens with one to four shade tree species but decreased sharply in the tea garden with six shade tree species.Our results suggested that the tree-tea agroforestry systems in Xishuangbanna had a strong capacity of carbon sequestration.

关 键 词：碳储量 林茶复合生态系统 西双版纳 

分 类 号：S571.1[农业科学—茶叶生产加工]