干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠南缘梭梭基径结构分布模拟

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	古尔班通古特沙漠南缘梭梭基径结构分布模拟
其他题名	Modeling basal diameter distribution of Haloxylon ammodendron on the southern edge of the Gurbantunggut Desert,Northwest China
	汪少华 1; 杨婷 2
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2018
卷号	32 期号:7 页码:104-111
中文摘要	以古尔班通古特沙漠南缘15块梭梭样地调查数据为基础,利用Weibull模型、负指数模型、修正指数模型、混合Weibull模型进行梭梭基径分布结构模拟。结果表明:15块不同生境类型样地的梭梭林基径分布均呈左偏的山状曲线或反J形,林分天然更新良好;均方根误差RMSE和似然比chi~2值表明,总体上Weibull模型的基径拟合效果最好,其次是混合Weibull模型,最后是负指数模型与修正指数模型,当梭梭基径分布呈双峰分布时,混合Weibull模型的拟合效果最好;混合Weibull分布在各样地总体1~ 3cm径阶内均低估了林木株数,在5~ 10cm径阶的中小径阶上与Weibull分布拟合结果接近,残差在0~ 10范围,两者对样地大径阶梭梭的估计残差几乎接近于0。因此,Weibull模型和混合Weibull模型能较好地模拟沙漠梭梭林的基径分布,为古尔班通古特沙漠天然以及人工梭梭林的恢复更新与优化经营提供科学依据。
英文摘要	Based on the investigation data from fifteen plots of Haloxylon ammodendron plantations on the southern edge of the Gurbantunggut Desert,the Weibull model,negative exponential model,modified exponential model and the mixture Weibull model were applied to simulate the basal diameter distribution of Haloxylon ammodendron. Results showed that in fifteen plots with different habitat types,the basal diameter distribution of Haloxylon ammodendron exhibited the left side mountain - liking curve or inverse J - shape,which meant the natural regeneration of Haloxylon ammodendron was relatively good. The values of the root mean square error RMSE and the likelihood ratio chi~2 showed that the fitting effect of the Weibull model was the best,then was the mixture Weibull models,and the negative exponential models and modified exponential models were the least. The fitting effect of the mixture Weibull model was the best when the basal diameter distribution was double peaks. The number of trees were underestimated in 1cm ~ 3cm diameter of overall plots by the mixture Weibull model,and the fitting effect of the mixture Weibull model was close to the Weibull models in 5cm ~ 10cm diameter order,and the residuals ranged from 0 to 10,and the residual was almost close to 0 when the two Weibull models were applied to estimate the distribution of large size basal diameter order in all the plots. Therefore,the Weibull model and the mixture Weibull model can be applied to simulate Haloxylon ammodendrons basal diameter distribution in desert,and provide the scientific basis for the natural and artificial Haloxylon ammodendron forests restoration,regeneration and optimized management.
中文关键词	基径分布 ; 梭梭 ; Weibull模型 ; 混合Weibull模型 ; 古尔班通古特沙漠
英文关键词	basal diameter distribution Haloxylon ammodendron Weibull model mixture Weibull model Gurbantunggut Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:6263163
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237712
作者单位	1.石河子大学农学院, 石河子, 新疆 832000, 中国; 2.石河子大学理学院, 石河子, 新疆 832000, 中国
推荐引用方式 GB/T 7714	汪少华,杨婷. 古尔班通古特沙漠南缘梭梭基径结构分布模拟[J]. 石河子大学,2018,32(7):104-111.
APA	汪少华,&杨婷.(2018).古尔班通古特沙漠南缘梭梭基径结构分布模拟.干旱区资源与环境,32(7),104-111.
MLA	汪少华,et al."古尔班通古特沙漠南缘梭梭基径结构分布模拟".干旱区资源与环境 32.7(2018):104-111.