| 摘要: |
| 【目的】准确构建库布齐沙漠地区4种人工灌木林生物量预测模型，为估算当地灌木林生态系统碳储量提供基础。【方法】以库布齐沙漠地区4种人工灌木林（柠条、沙棘、沙柳、杨柴）为研究对象，采用平均株收获法测定4种灌木不同营养器官（干、枝、叶、根）的生物量，将实测生长因子（地径D、株高H、冠幅直径C）及其组合因子（冠幅面积S、植冠体积V、植株体积D2H）作为自变量，利用生物量模型法选取一元线性函数、二次函数、对数函数、幂函数和指数函数，构建4种灌木各器官、地上及全株生物量模型。【结果】4种灌木不同器官中，柠条叶生物量最优模型为幂函数，干、枝、根3种器官生物量最优模型均为二次函数。沙棘干生物量最优模型为幂函数，枝、叶、根3种器官生物量最优模型均为一元线性函数。沙柳干、枝、根生物量最优模型均为一元线性函数，叶生物量最优模型为二次函数。杨柴干生物量最优模型为一元线性函数，枝、叶、根3种器官生物量最优模型均为二次函数。4种灌木地上生物量与全株生物量最优模型相同，柠条和杨柴最优模型为二次函数，沙棘和沙柳最优模型为一元线性函数。4种灌木全株与地上生物量模拟方程平均相对误差（RMA）为13.46%~24.07%，总相对误差（RS）为－11.19%~7.66%，拟合精度较高。【结论】构建的4种人工灌木林全株与地上生物量预测模型拟合精度较高，可用于库布齐沙漠地区区域尺度生物量和碳储量估算。 |
| 关键词: 库布齐沙漠；人工灌木林；生物量模型 碳储量 |
| DOI： |
| 分类号: |
| 基金项目:内蒙古自治区应对气候变化及低碳发展专项(内发改环资字［2016］615号) |
|
| Establishment of biomass models for artificial shrubbery in the Kubuqi desert area |
|
GUO Yudong,ZHANG Qiuliang,CHEN Xiaoyan,et al
|
| Abstract: |
| 【Objective】Accurate biomass models for four kinds of artificial shrubbery in the Kubuqi desert were constructed to provide basis for estimating carbon storage of local shrubbery ecosystem.【Method】Four artificial shrubbery varieties (Caragana korshinskii,Hippophae rhamnoides,Salix psammophila and Corethrodendron fruticosum var.mongolicum) in the Kubuqi desert area were selected and the average strain harvest method was used to determine biomass of different vegetative organs (stem,branch,leaf and root).The measured growth factors (ground diameter,plant height and crown diameter) and their combination factors (crown area,plant crown volume and plant volume) were taken as the independent variables to construct biomass models for organs,aboveground and whole plant using the biomass model method with linear function,quadratic function,logarithmic function,power function and exponential function.【Result】The optimal model for leaf biomass of Caragana korshinskii was power function,and the optimal model for stem,branch and root organs biomass was quadratic function.The optimal stem biomass model of Hippophae rhamnoides was power function,while the optimal model of branches,leaves and roots biomass was linear function.The optimal model for stem,branch and root biomass of Salix psammophila was linear functions,and the optimal model for leaf biomass was quadratic function.The optimal model for stem biomass of Corethrodendron fruticosum var.mongolicum was linear function,and the optimal model for branches,leaves and roots biomass was quadratic function.The optimal model for aboveground biomass and whole plant biomass was the same.The optimal model for Caragana korshinskii and Corethrodendron fruticosum var.mongolicum was quadratic function.The optimal model of Hippophae rhamnoides and Salix psammophila was linear function.The models had mean relative error (RMA) of 13.46%―24.07% and total relative error (RS) of －11.19%―7.66% for the four shrubs.【Conclusion】The established biomass models of the four shrubs had high fitting accuracy and can be applied to biomass and carbon storage estimation at regional scale in the Kubuqi desert area. |
| Key words: Kubuqi desert artificial shrubbery biomass model carbon storage |
