滇中地区矮杨梅灌丛碳密度分配格局研究  

Carbon Density and Its Spatial Distribution Dominated Pattern of the Myrica nana Cheval Shrub in Central Yunnan

作　　者：郭子豪 李瑶珂 巩合德[1] GUO Zi-hao;LI Yao-ke;GONG He-de(School of Geography and Ecotourism,Southwest Forestry University,Kunming Yunnan 650224,P.R.China)

机构地区：[1]西南林业大学地理与生态旅游学院,云南昆明650224

出　　处：《西部林业科学》2020年第1期149-155,161,共8页Journal of West China Forestry Science

基　　金：国家自然科学基金“气候变暖对哀牢山常绿阔叶林根际土壤碳过程的影响研究(31560189)”;国家科技基础性工作专项“我国主要灌丛植物群落调查(2015FY110300)子课题”;“云南省灌丛植物群落调查(2015FY1103001-4)”。

摘　　要：为揭示滇中地区矮杨梅灌丛的碳密度分配特征,采用样地调查的方法,通过对云南省滇中地区13个样地的不同矮杨梅灌丛的碳密度特征值进行调查研究,并对灌丛与土壤的生物量、含碳率、碳密度及碳含量等值进行测定,分析滇中地区矮杨梅灌丛碳汇及其分布情况的成因及规律。结果表明,研究区中矮杨梅灌丛的生物总碳密度(灌木层及草本层)、凋落物总碳密度、土壤总有机碳密度和总碳密度的均值分别为80.28±29.82t/hm 2、25.84±10.18t/hm 2、0.02±0.01t/hm 2和80.30±29.82t/hm 2。矮杨梅灌丛的灌木层碳主要分配在根部(32.68%-39.66%),灌木层碳密度占总生物量碳密度的56.25%左右。草本层地上部分与地下部分碳分布差异显著,地下部分平均值60.43±10.97t/hm 2(50.28%-73.12%),地上部分平均值为46.65±14.21t/hm 2(26.88%-49.72%),在矮杨梅灌丛中,灌木层茎部(35.07%)占有最大比例的碳密度值,且滇中地区矮杨梅的生物碳密度明显高于中国6种主要灌丛的平均值(10.88t/hm 2)。In order to find out the carbon density distribution characteristics of Myrica nana Cheval shrubs in the central Yunnan Province,and provide scientific support for the study of the characteristics of regional shrub carbon density,by using the method of sample plot survey and the characteristics such as carbon density investigation in 13 different shrub sites in central Yunnan province of Myrica nana Cheval shrubs,relevant data on biomass,carbon proportion,carbon density and carbon content of shrubs and soils were measured.The results showed that the biochar density(shrub layer and herb layer),litter carbon density,soil organic carbon density and total carbon density of Myrica nana Cheval shrubs were 80.28±29.82t/hm 2,25.84±10.18t/hm 2,0.02±0.01t/hm 2 and 80.30±29.82 t/hm 2,respectively.The carbon density in the shrub layer was mainly distributed in the root part(32.68%-39.66%),and the carbon density of shrub layer accounted for almost 56.25%.The carbon distribution between the above-ground part and the underground part of the herb layer was significantly different.The average value of the underground part was 60.43±10.97t/hm 2(50.28%-73.12%),and the average value of the above-ground part was 46.65±14.21t/hm 2(26.88%-49.72%).In the Myrica nana Cheval shrub,the stem layer(35.07%)of the shrub layer occupies the largest proportion of carbon density(10.88t/hm 2),significant higher than the average of the six major shrub species in China.

关 键 词：矮杨梅灌丛 碳密度 生物量 含碳量 

分 类 号：S667.6[农业科学—果树学]