川中丘陵区火棘生物量模型及生态化学计量特征  

Biomass Model Establishment and Ecological Stoichiometric Characteristics of Pyracantha fortuneana in Hilly Areas of Central Sichuan,China

作　　者：陈俊华[1] 刘一丁 蒋川东 刘威君 谢川 唐艺家 慕长龙[1] CHEN Junhua;LIU Yiding;JIANG Chuandong;LIU Weijun;XIE Chuan;TANG Yijia;MU Changlong(Sichuan Key Laboratory of Ecological Restoration and Conservation for Forest and Wetland,Sichuan Academy of Forestry,Chengdu 610081,Sichuan,China;School of Resources and Environmental Engineering,Mianyang Teachers University,Mianyang 621006,Sichuan,China)

机构地区：[1]四川省林业科学研究院/森林与湿地生态恢复与保育四川省重点实验室,四川成都610081 [2]绵阳师范学院资源环境工程学院,四川绵阳621006

出　　处：《西北林学院学报》2025年第2期84-92,102,共10页Journal of Northwest Forestry University

基　　金：四川省林草科技创新团队项目(2023LCTD0104)。

摘　　要：植物的生物量是生态系统生产者的生产力和固碳能力的体现,研究植物的C、N、P含量及C/N、C/P、N/P的关系,能够反映它们对环境变化的适应能力,有利于研究国家“双碳”目标下植物的固碳增汇机制。本研究以四川盆地丘陵区典型灌木-火棘作为研究对象,通过设定样地,以全收获法收集了32株火棘标准株的干、根、枝、果等器官的生物量,以植株体积V作为估测模型的自变量,在Origin 2018软件中进行曲线拟合,建立火棘各器官及全株生物量的最优估算模型,并分析了C、N、P含量,C/N、C/P、N/P以及各元素之间的相关性。结果表明:1)火棘各器官生物量以枝和根的占比较高,分别占全株生物量的34.53%和33.64%。地上部分生物量占全株生物量的66.36%,明显高于地下部分。2)株高(H)、地径(D)、冠幅面积(CA)、D2H、植株体积(V)与总生物量及各器官生物量之间均具有很强的相关性(P<0.01)。其中植株体积(V)最高,适合选取作为回归方程的自变量。3)除火棘的果以外,各器官及全株最优生物量模型是幂函数,其中干、地上部分、全株的R^(2)分别为0.907、0.875和0.858。火棘果的拟合效果不太理想,最优模型为二次多项式,R^(2)为0.554。4)各器官及整株N、P、C 3种元素的平均含量较低;干对N和P的利用效率最高,枝对N的利用效率最低,果对P的利用效率最低。干、枝、根的生长受P的限制,而果的生长受N的限制。The biomass of plants is a reflection of the productivity and carbon sequestration capacity of ecosystem producers.Studying the C,N,P content of plants and the relationship between C/N,C/P,N/P can reflect their adaptabilities to environmental changes,which is conducive to studying the carbon sequestration and sink enhancement mechanisms of plants under global climate change and national“dual carbon”(carbon peaking and carbon neutrality)goals.This study focused on Pyracantha fortuneana,a typical shrub species in the hilly area of the Sichuan Basin.By setting up sample plots and using the whole plant harvest method,the biomass of 32 standard P.fortunei plants,including stems,roots,branches,fruits,and other organs,was collected.The plant volume V was used as the independent variable for the estimation model.Curve fitting was performed by Origin 2018 software to establish the optimal estimation model for the biomass of various organs and whole plant of P.fortunei.The correlations between C,N,P contents,C/N,C/P,N/P ratios,and various elements were analyzed.The results showed that 1)the biomass amounts of branches accounted for 34.53%of the total,and that of roots accounted for 33.64%of the total,relatively higher than other organs.The biomass of the aboveground part was significantly higher than that of the underground part,accounting for 66.36%of the total.2)Parameters such as plant height(H),ground diameter(D),crown area(CA),D2H,plant volume(V)were strongly correlated to total biomass,and biomass of various organs(P<0.01),in which the correlationship of V was the highest,indicating V is suitable to be selected as the independent variable in the regression equation.3)Except for the fruit,the optimal biomass models for each organ and whole plant were power functions,with R^(2) values of 0.907,0.875,and 0.858 for the stem,aboveground,and whole plant,respectively.The fitting effect of the fruit was not satisfactory,and the optimal model was quadratic polynomial with R^(2) of 0.554.4)The average contents of N,P,and C

关 键 词：川中丘陵区 火棘 生物量模型 生态化学计量特征 

分 类 号：S567.19[农业科学—中草药栽培]