马尾松木荷不同比例混交林植被碳密度特征  

Carbon density of vegetation of mixed plantation of Pinus massoniana and Schima superba in different proportions

作　　者：赖国桢 曹梦[1] 潘萍[1] 欧阳勋志[1] 国瑞 向云西 吴自荣[1] LAI Guozhen;CAO Meng;PAN Ping;OUYANG Xunzhi;GUO Rui;XIANG Yunxi;WU Zirong(College of Forestry, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, Chin)

机构地区：[1]江西农业大学林学院,江西南昌330045

出　　处：《中南林业科技大学学报》2018年第2期108-113,共6页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金项目(31360181;31160159);江西省林业科技创新专项资金项目(201607)

摘　　要：以飞播马尾松为研究对象,根据马尾松与木荷的树种组成比例,以不同混交比例的马尾松、木荷飞播林(Ⅰ:10马、Ⅱ:8马2木、Ⅲ:7马3木、Ⅳ:6马4木)为对象,设置标准样地,比较研究不同混交林植被层碳密度分布特征。结果表明:不同类型乔木层碳密度范围为35.64~56.04 t·hm^(-2),从大到小依次是类型Ⅳ>Ⅲ>Ⅱ>Ⅰ,但差异不显著(P>0.05);林下植被层碳密度范围为0.61~0.86 t·hm^(-2),表现为类型Ⅰ>Ⅱ>Ⅲ>Ⅳ,不同类型间也不存在显著差异(P>0.05);凋落物层碳密度范围为0.32~1.29 t·hm^(-2),表现为类型Ⅳ>Ⅲ>Ⅱ>Ⅰ,不同类型间存在显著差异(P<0.05);类型Ⅰ-Ⅳ植被总碳密度分别为36.82、40.40、48.89和57.94 t·hm^(-2),植被总碳密度表现为随着木荷混交比例的提高而逐渐增大,其中类型Ⅳ较明显高于其他类型。因此,飞播马尾松林中补植木荷有利于提高植被的固碳能力。To analyze the carbon density of vegetation layers in different mixing proportions of Pinus massoniana and Schima superba,4 types-type Ⅰ（ten Pinus massoniana）,type Ⅱ（eight Pinus massoniana and two Schima superba）,type Ⅲ（seven Pinus massoniana and three Schima superba）and type Ⅳ（six Pinus massoniana and four Schima superba）,which were divided according to the proportions of tree species,were selected to set the typical sample plots which composed of the aerially-seeded Pinus massoniana.The results were as follows：The carbon density of tree layer between different types was in 35.64-56.04 t·hm^-2,with the descending order of Ⅳ,Ⅲ,Ⅱand Ⅰ,but the differences were not significant（P 0.05）.The carbon density of understory vegetation layer was 0.61-0.86 t·hm^-2,the relationships embodies as ⅠⅡⅢⅣ,and the differences between each groups were not significant too（P 0.05）.The carbon density of litter layer was in 0.32-1.29 t·hm^-2,the relationships embodies as ⅣⅢⅡⅠ,and the differences between each groups were significant（P〈0.05）.The vegetation carbon density from type Ⅰ to type Ⅳ was 36.82 t·hm^-2,40.40 t·hm^-2,48.89 t·hm^-2 and 57.94 t·hm^-2,and it was decreased with the increase of mixing proportions,the type Ⅳ were obvious higher than others.Therefore,replanting Schima superba in aerially-seeded Pinus massoniana proportions could effectively improve the carbon sequestration capacity of vegetation.

关 键 词：马尾松 混交比例 植被 碳密度 

分 类 号：S791.248[农业科学—林木遗传育种]