文献类型：期刊文献

中文题名：西鄂尔多斯地区5种荒漠优势灌丛生物量分配格局及预测模型

英文题名：Biomass Allocation Patterns and Estimation Model of Five Desert Shrub Species in West Ordos Region

作者：党晓宏[1,2] 高永[1,3] 蒙仲举[1,3] 高君亮[4] 王珊[1] 包蕾[5] 余新春[4] 王祯仪[1] 王则宇[1]

第一作者：党晓宏

机构：[1]内蒙古农业大学沙漠治理学院;[2]内蒙古杭锦荒漠生态系统定位观测研究站;[3]内蒙古农业大学中央与地方共建风沙物理重点实验室;[4]中国林业科学研究院沙漠林业实验中心;[5]通辽市城乡规划技术管理中心

年份：2017

卷号：0

期号：1

起止页码：100-108

中文期刊名：中国沙漠

外文期刊名：Journal of Desert Research

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家林业局引进国外先进林业科学技术项目(2015-4-22);内蒙古自治区自然科学基金项目(2015MS301)

语种：中文

中文关键词：根茎比;生物量模型;分配格局;荒漠灌丛;鄂尔多斯

外文关键词：root-to-shoot ratio;;biomass estimation model;;allocation patterns;;desert shrub;;Ordos

分类号：Q948

摘要：以西鄂尔多斯地区5种荒漠优势灌丛(沙冬青(Ammopiptanthus mogolicus)、四合木(Tetraena mongolica)、霸王(Zygophyllum xanthoxylum)、红砂(Reaumuria songarica)、半日花(Helianthemum songaricum))为研究对象,采用平均标准灌丛全部收获法测定灌丛各营养器官(枝条、叶片、根系)生物量,并分别以丛高(H)和冠幅(C)的复合因子(CH)及基径(D)和丛高(H)的复合因子(D2 H)为自变量建立单株灌丛生物量预测模型。通过决定系数(R2)、估计值的标准误差(SEE)和F检验显著水平筛选出各灌丛种最佳生物量预测模型。结果表明:(1)5种荒漠灌丛单株总生物量干鲜比差异性显著(P<0.05),各营养器官间差异性也达到显著水平(P<0.05);灌丛根冠比种间差异显著(P<0.05),红砂(1.05)>霸王(1.01)>半日花(0.92)>沙冬青(0.90)>四合木(0.49);(2)根系和枝条是荒漠灌丛生物量的主要贡献者,其生物量占灌丛总生物量比例之和均在80%以上,根系生物量分配随根系径级的增加而增加;(3)5种荒漠优势灌丛单株灌丛生物量预测模型R2值均在0.85以上,且在0.05水平上显著,生物量模型预测精度较高。
In this paper,the main desert shrub species:Ammopiptanthus mogolicus,Tetraena mongolica,Zygophyllum xanthoxylum,Reaumuria songarica,Helianthemum songaricumshrub were taken as the research objects in west Ordos region,Inner Mongolia autonomous region,China.The average standard shrub harvest method was used and each part(branch,leaves and roots)biomass of shrub was measured in field.Shrub height(H)combined respectively by crown area(C)as CH and diameter(D)as D^2H was used as independent variable to establish the biomass model.The optimal models were selected according to the largest determination coefficient(R2),the smallest standard error of estimate(SEE)and significance level of Ftest.The results showed that the differences among the dry/fresh weight ratio of single shrub and the differences among parts of shrub reached a significant level(P<0.05).The differences among root-shoot ratio of five shrub species reached a significant level(P<0.05).The root-shoot ratio of five shrub species was respectively that Reaumuria songarica was 1.05,Zygophyllum xanthoxylum was 1.01,Helianthemum songaricum was 0.92,Ammopiptanthus mogolicus was 0.90,Tetraena mongolica was 0.49.The roots and branches were main contributors to total biomass of desert shrubs and the proportion of roots and branches biomass to total biomass reached above 80%.With the increase of root diameter class,the root biomass was increasing.The R2 value of single shrub biomass models were all more than0.85 and reached a significant level(P<0.05).The prediction accuracy of five desert shrubs' biomass models were good.The important basic data was provided by this research results and theoretical basics for the response of shrub productivity,carbon storage and carbon cycle to global climate changes in desert area of western China.