桂西南不同林龄马尾松人工林生物生产力及其分布特征  

Biomass Productivity and Distribution of Pinus massoniana Plantations with Different Stand Ages in Southwestern Guangxi

作　　者：张日施 汤雷吼 曹继钊[3] 何斌[1] 惠柳笛 南雅薇 Zhang Rishi;Tang Leihou;Cao Jizhao;He Bin;Hui Liudi;Nan Yawei(Forestry College of Guangxi University,Nanning,Guangxi 530004,China;Guangxi State-owned Paiyangshan Forest Farm,Ningming,Guangxi 547200,China;Guangxi Forestry Research Institute,Nanning,Guangxi 530002,China)

机构地区：[1]广西大学林学院,广西南宁530004 [2]广西壮族自治区国有派阳山林场,广西宁明547200 [3]广西壮族自治区林业科学研究院,广西南宁530002

出　　处：《广西林业科学》2021年第4期373-377,共5页Guangxi Forestry Science

基　　金：广西创新驱动发展专项资金项目(桂科AA17204087-11);国家自然科学基金项目(3176020,31560206,31160152)。

摘　　要：为探究桂西南不同林龄马尾松(Pinus massoniana)人工林生物量积累及生产力变化规律,以5、10和15年生马尾松(桐棉松种源)人工林为研究对象,采用样地调查与生物量实测方法,研究其生物量、年净生产力及其分配特征。结果表明,马尾松人工林乔木层生物量为34.07~162.16 t/hm^(2),随林龄的增加而增加;10~15年的乔木层生物量增长量(68.62 t/hm^(2))大于5~10年(59.47 t/hm^(2));随着林龄的增加,干材生物量的比例逐渐增大,树叶生物量的比例逐渐减小。5、10和15年生马尾松人工林林下植被生物量分别为2.80、2.33和2.54 t/hm^(2),其中灌木层分别占36.43%、53.65%和59.06%,草本层分别占63.57%、46.35%和40.94%;凋落物层生物量随林龄增加而增加,分别为1.83、3.17和5.30 t/hm^(2)。5、10和15年生马尾松人工林乔木层年均净生产力为10.48、13.83和16.00 t·hm^(-2)·a^(-1),其中干材和干皮年均净生产力比例随林龄增加而增大,树叶和树枝年均净生产力比例呈相反趋势。桂西南马尾松人工林具有较高的生物生产力水平,不同林龄人工林的年均净生产力高于国内多数区域的马尾松人工林。In order to study change laws of biomass accumulation and productivity of Pinus massoniana planta⁃tions in southwestern Guangxi,,taking 5-year-old,10-year-old and 15-year-old P.massonianas(Tongmian provenance)plantations as materials,biomass,annual net productivity and distribution characteristics were studied by sample plot investigation and biomass measurement.Results showed that biomass of tree layer was 34.07-162.16 t/hm^(2),which increased with increase of age.Biomass growth of tree layer from 10 to 15 years(68.62 t/hm^(2))was greater than that from 5 to 10 years(59.47 t/hm^(2)).With increase of age,proportions of stem biomass increased,while leaf biomass gradually decreased.Biomass of undergrowth vegetation were 2.80,2.33 and 2.54 t/hm^(2) for 5-year-old,10-year-old and 15-year-old P.massonianas plantations,respectively,of which shrub layer accounted for 36.43%,53.65%and 59.06%,and herb layer accounted for 63.57%,46.35%and 40.94%,respectively.Biomass of litter layer were 1.83,3.17 and 5.30 t/hm^(2),respectively.Annual net pro⁃ductivity of tree layer were 10.48,13.83 and 16.00 t·hm^(-2)·a^(-1),respectively.Proportions of annual net productivity of stem and bark increased with increase of age,while proportions of annual net productivity of leaf and branch showed opposite trend.P.massonianas plantations in southwestern Guangxi had high biological produc⁃tivity,and annual net productivity of plantations at different ages was mostly higher than that of other regions.

关 键 词：生物量 生产力 样地调查 马尾松人工林 

分 类 号：S718.55[农业科学—林学]