毛乌素沙地不同立地条件沙柳生物量异速生长规律  

Biomass allocation in Salix psammophila and the response to different site conditions in the Mu Us Sandy Land

作　　者：王岳 刘中华 于明含 贺宇 郝蕾 刘学瑶 安骁 WANG Yue;LIU Zhonghua;YU Minghan;HE Yu;HAO Lei;LIU Xueyao;AN Xiao(Anhui Tongyuan Environment Energy Saving Co.,Ltd.,Hefei 230000,Anhui,China;School of Resources and Environmental Economics,Inner Mongolia University of Finance and Economics,Hohhot 010070,Inner Mongolia,China;Resource Utilization and Environmental Protection Coordinated Development Academician Expert Workstation in the North of China,Inner Mongolia University of Finance and Economics,Hohhot 010070,Inner Mongolia,China;Key Laboratory of State Forestry Administration on Soil and Water Conservation,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Inner Mongolia Autonomous Region Water Conservancy Development Center,Hohhot 010020,Inner Mongolia,China)

机构地区：[1]安徽省通源环境节能股份有限公司,安徽合肥230000 [2]内蒙古财经大学资源与环境经济学院,内蒙古呼和浩特010070 [3]祖国北疆资源利用与环境保护协调发展院士专家工作站,内蒙古呼和浩特010070 [4]北京林业大学水土保持学院,水土保持国家林业局重点实验室,北京100083 [5]内蒙古自治区水利事业发展中心,内蒙古呼和浩特010020

出　　处：《干旱区研究》2025年第2期289-298,共10页Arid Zone Research

基　　金：内蒙古自治区科技计划项目(2023YFHH0068);国家自然科学基金项目(31700439,U23A2014);内蒙古自治区“五大任务”研究专项(NCXWD2472)。

摘　　要：为从生物量积累和分配的角度探究沙柳(Salix psammophila)对不同沙地环境条件的适应策略,揭示影响沙柳生物量分配的主要环境因子,为沙柳种群稳定性建设和可持续经营提供参考,选取沙丘迎风坡、背风坡、丘间地和平坦沙地4种立地类型的沙柳林为研究对象,测定各样地内沙柳代表株的丛生枝基径、长度和茎叶生物量,用标准主轴回归建立茎、叶生物量与基径、枝长的异速生长方程,以探明沙柳丛生枝尺度上茎叶生物量积累分配与个体尺寸的依赖关系;进一步通过主轴漂移的方法,检验茎叶生物量异速生长方程在不同立地类型条件下的差异,进而探讨环境条件对沙柳生物量积累和分配的影响。结果表明:(1)随丛生枝个体增大,沙柳茎生物量积累速率高于叶生物量积累速率,这一规律在各个立地类型间表现一致;(2)沙柳丛生枝茎、叶生物量分配在不同立地类型间差异显著,沙丘(迎风坡、背风坡)的叶生物量占丛生枝条生物量的比例显著高于丘间地和平坦沙地(P<0.05);(3)造成沙柳生物量及其分配出现立地类型差异的主要土壤因子是土壤含水率,其中全剖面含水率(0~100 cm)与丛生枝生物量显著相关(P<0.01),深层土壤含水率(60~100 cm)与丛生枝地上生物量分配显著相关。沙柳的生物量积累与分配在不同立地类型间具有显著差异,深层土壤含水率比全剖面土壤含水率对生物量分配的影响更显著,基于本研究结果,未来可以通过适当人工干预以满足沙柳生长的水分要求,实现沙柳人工林种群的稳定发展。This study aimed to clarify the adaptability strategies of Salix psammophila to different environments from the perspective of resource allocation for the stable construction and sustainable management of S.psammophila plantations.S.psammophila plantations in four types of sites(windward slope,leeward slope,interdune land,and flat sand land)were surveyed in the Mu Us Sandy Land in Ningxia.The characteristics of the S.psammophila population,including morphological parameters like basal diameter,branch length,and stem and leaf biomass,were recorded.The effects of topography on the biomass accumulation and distribution between the S.psammophila organs were studied based on the allometric growth model.(1)With growth,S.psammophila tends to reduce the proportion of leaf resources and increase the proportion of stem resources.(2)The site factors significantly impact biomass and its distribution between the S.psammophila organs.The average biomass of branches in the dune(windward and leeward slopes)is significantly higher than that in the interdune land(P<0.05),and the allometric growth index of leaf-stem biomass is significantly higher in the dune than in the interdune and flat sand lands(P<0.05).(3)The main soil factor that affects biomass and its distribution between the S.psammophila organs is soil moisture.Soil moisture of the whole section(0-100 cm)determines the biomass,and soil moisture of the deep layer moisture content(60-100 cm)affects the biomass distribution trade-off between the stem and leaf.The biomass accumulation and allocation of S.psammophila displayed significant differences among different site types,and the effect of deep soil moisture on biomass allocation was more significant than that of full-profile soil moisture.In the future,artificial intervention can be adopted to satisfy the water requirement for S.psammophila growth and realize the stable development of the S.psammophila plantation population.

关 键 词：毛乌素沙地 沙柳 生物量分配 立地类型 异速生长 

分 类 号：G63[文化科学—教育学]