筇竹构件生物量积累分配特征及其与土壤物理性质的关系  

Biomass of accumulation and allocation characteristics of Qiongzhuea tumidinoda components and its relationship with soil physical properties

作　　者：吴义远 董文渊[2] 浦婵 谢泽轩 钟欢 李吉 张炜 WU Yiyuan;DONG Wenyuan;PU Chan;XIE Zexuan;ZHONG Huan;LI Ji;ZHANG Wei(College of forestry,Nanjing Forestry University,Nanjing 210037,China;Institute of Qiong Bamboo,Southwest Forestry University,Kunming 650224,China;Daguan County Forestry and Grassland Bureau,Zhaotong 657400,China;College of Forestry,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]南京林业大学林学院,南京210037 [2]西南林业大学筇竹研究院,昆明650224 [3]大关县林业和草原局,昭通657400 [4]西南林业大学林学院,昆明650224

出　　处：《生态学报》2022年第9期3516-3524,共9页Acta Ecologica Sinica

基　　金：国家林业公益性行业科研专项(201204103);中央财政林业科技推广示范资金项目(【2018】TG14号);中央财政林业科技推广示范资金项目(【2019】TG14号);江苏省研究生科研创新计划(NO.KYCX21-0925)。

摘　　要：以大关县3种土层深度0—40 cm、0—80 cm和0—120 cm的天然筇竹林为研究对象,在个体水平上研究了竹子构件生物量分配特征及其与土壤物理性质的相关关系,以期为筇竹林适宜立地条件选择、适地适竹及定向培育提供的理论指导。结果表明:(1)同一土层深度,土壤含水量、最大持水量、毛管持水量、毛管孔隙度和总孔隙度均呈现出随土层增加而增加的趋势,而土壤容重和非毛管孔隙度则呈现出随土层增加而减少的趋势,且薄土层和厚土层各土壤物理因子差异显著(P<0.05)。(2)随着土层厚度的增加,筇竹总生物量以及构件秆、枝、叶、蔸、鞭和根生物量表现出增加的趋势,且不同土层厚度差异显著(P<0.05)。(3)随着土层厚度的增加,筇竹构件枝、叶、蔸、鞭、根生物量分配相应增加,秆生物量分配则相应减少,但各处理间差异并不显著(P>0.05)。(4)土壤物理因子对筇竹构件生物量分配有着显著影响(P<0.05),单一土壤物理因子对筇竹构件生物量分配特征的重要性大小排序为土壤含水量>总孔隙度>最大持水量>容重>毛管孔隙度>毛管持水量>非毛管孔隙度。结论:土壤物理因子沿土层厚度的变化对筇竹构件生物量分配产生了重要影响,在土壤物理性质较差的生境中,筇竹会优先将生物量分配给秆,并通过减少叶生物量来响应水分缺失的不利环境,这对筇竹林立地条件选择有指导意义,即筇竹宜选择较深厚土层经营,以促进生物量积累和种群生长。The depth of three types of soil layers(0—40 cm,0—80 cm,and 0—120 cm)in Daguan County,Yunna Province were chosen as the research object to analyze the biomass allocation characteristics of Q.tumidinoda components at the individual level and their relationship with soil physical properties.This study provided a theoretical guidance for the selection of suitable site conditions,the suitable sites of bamboo and directional cultivation.The results showed that:(1)at the same soil depth,soil water content,maximum water holding capacity,capillary water holding capacity,capillary porosity and total porosity increased with the increasing of soil layer,while soil bulk density and non-capillary porosity decreased with the increasing of soil layer.There were significant differences in soil physical factors between thin and thick soil layers(P<0.05).(2)With the increasing of soil layer thickness,the total biomass and biomass of culm,branch,leaf,stump,rhizome and root of Q.tumidinoda presented increasing trends,and there was significant difference among the thickness of different soil layers(P<0.05).(3)With the increasing of soil thickness,the biomass allocation of branch,leave,stump,rhizome and root increased,while the biomass allocation of culms decreased,but there was no significant difference among the treatments(P>0.05).(4)Soil physical factors had significant effects on biomass allocation of Q.tumidinoda components(P<0.05).The order of importance of single soil physical factor to biomass allocation characteristics of Q.tumidinoda components was soil water content>total porosity>maximum water holding capacity>bulk density>capillary porosity>capillary water holding capacity>non capillary porosity.In conclusion,the changes of soil physical factors along the soil thickness had an important influence on the biomass distribution of Q.tumidinoda components.In the environment with poor soil physical properties,Q.tumidinoda would preferentially allocate the biomass to the culm and reduce the leaf biomass to respond to the a

关 键 词：筇竹 构件 生物量分配 土壤物理性质 冗余分析 

分 类 号：S795[农业科学—林木遗传育种] S714.2[农业科学—林学]