古尔班通古特沙漠固沙灌木的冠幅预测模型  

Crown prediction models of the sand-fixing shrubs in Gurbantunggut Desert

作　　者：路丽宁 张定海[1] 李功麟 LU Lining;ZHANG Dinghai;LI Gonglin(Center for Quantitative Biology,College of Science,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学理学院数量生物研究所,兰州730070

出　　处：《生态科学》2022年第5期81-89,共9页Ecological Science

基　　金：甘肃省科技计划项目(21JR7RA831);国家自然基金项目(41661022);甘肃农业大学盛彤笙创新基金项目(GAU-CX1121);甘肃农业大学学科建设专项基金项目(GAU-XKJS-2018-144)。

摘　　要：以古尔班通古特沙漠中三种类型沙丘(固定沙丘、半固定沙丘和流动沙丘)上主要固沙灌木梭梭(Haloxylon ammodendron)、白梭梭(Haloxylon persicum)、沙拐枣(Calligonum mongolicum)、蛇麻黄(Ephedra distachya)和油蒿(Artemisia ordosica)为研究对象,利用12个基础模型建立了不同沙丘类型上所有灌木和不同类型灌木的冠幅模型。模型拟合结果表明:不论是不同沙丘类型上所有灌木的拟合效果还是不同类型灌木的拟合效果,固定沙丘和半固定沙丘均优于流动沙丘。同时,两个近“S”形模型M7(Gompertz Model)和M12(HossfeldⅠModel)对三种类型沙丘上的固沙灌木均有较好拟合效果;M1(Linear Model)、M2(Quadratic Model)、M3(Power Model)、M6(Logistic Model)、M7、M9(Gauss Model)、M10(Mitscherlinch Model)和M12八个模型适用于研究区绝大部分固沙灌木冠幅模型的模拟。但不同沙丘类型上所有灌木和不同类型的灌木都有不同的最优冠幅模型。研究可为今后该地区相关生态模型建立和防风固沙效益的评价提供科学依据。Taking the main sand-fixing shrubs Haloxylon ammodendron,Haloxylon persicum,Calligonum mongolicum,Ephedra distachya and Artemisia ordosica on the three types of dunes(the fixed sand dunes,semi-fixed dunes and mobile dunes)in the Gurbantunggut Desert for the research subjects,12 basic models were used to establish crown models of shrubs on different types of sand dunes and shrubs.The simulation results show that both fixed and semi-fixed dunes have better fitting goodness than mobile dunes.Meanwhile,two nearly"S"shaped models M7(Gompertz Model)and M12(HossfeldⅠModel)have good simulation effects for sand-fixing shrubs on three types of sand dunes.Eight models,M1(Linear Model),M2(Quadratic Model),M3(Power Model),M6(Logistic Model),M7,M9(Gauss Model),M10(Mitscherlinch Model)and M12 are suitable for simulating the crown models of most sand-fixing shrubs in the study area.However,shrubs on different sand dunes and different types of shrubs have different optimal crown models.The study provides a scientific basis for the future research of ecological models and the evaluation of wind-break and sand-fixation benefits in this region.

关 键 词：古尔班通古特 固沙灌木 沙丘类型 冠幅预测模型 

分 类 号：Q939.5[生物学—微生物学]