干旱区生态环境知识资源中心(Arid): 荒漠梭梭基径-株高分布参数估计及其与林分因子模型研究

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	荒漠梭梭基径-株高分布参数估计及其与林分因子模型研究
其他题名	Estimation on the Distribution Parameters and its Stand Factor Model for Basal Diameter and Height of Haloxylon ammodendronin Desert
	汪少华 1; 杨婷 2
来源期刊	西北林学院学报
ISSN	1001-7461
出版年	2018
卷号	33 期号:4 页码:1-9
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,利用负指数模型、修正指数模型、混合Weibull模型进行梭梭基径分布和株高分布结构模拟,并对混合Weibull模型参数与林分因子的平均值(Mean)和标准差(SD)进行模型拟合。结果表明,15块不同生境类型样地的梭梭林基径和株高分布均呈左偏的山状曲线或反J形,林分天然更新良好;混合Weibull分布在各径阶和株高阶数内的拟合效果与实际情况较为接近,相比负指数模型和修正指数模型,混合Weibull分布拟合效果最好,能较好地模拟沙漠梭梭林的基径分布和株高分布情况;混合Weibull分布的尺度参数关系式(rhobeta_1+(1-rho)beta_2)与各样地基径和株高的Mean具有较好的线性相关性,线性拟合系数分别为0.79和0.89,形状参数关系式(rho/gamma1+(1-rho)/gamma2)与各样地基径和株高的Mean/SD呈非线性,其中二次多项式模型拟合效果最好。
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 negative exponential model,modified exponential model and the mixed Weibull model were applied to simulate the basal diameter and height distribution of H.ammodendron, and the parameters of the mixed Weibull model were fitted to the mean values and standard deviations of stand factor.The results showed that in fifteen plots of different habitat types,the basal diameter and height distribution of H.ammodendron exhibited the left side mountain-liking curve or inverse Jshape, which meant the natural regeneration of H.ammodendron was relatively good.The fitting effect of the mixed Weibull distribution in different basal diameters and heights was close to the actual situation,and compared to the negative exponential model and the modified exponential model,the mixed Weibull model that had the best fitting effect could be applied to simulate the basal diameter and height distribution of H. ammodendronin desert.The scale parameter relation of mixed Weibull distribution(rhobeta_1+(1-rho)beta_2) and the mean values of basal diameter and height for each plot had a good linear correlation,the linear regression coefficients were 0.79and 0.89,respectively,and the shape parameter relation(rho/gamma1+(1-rho)/gamma2) and the values of Mean/SD was nonlinear,and the quadratic polynomial model had the best fitting effect.
中文关键词	基径分布 ; 株高分布 ; 梭梭 ; 混合Weibull模型
英文关键词	basal diameter distribution height distribution Haloxylon ammodendron mixed Weibull model
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:6280478
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/2XILL650/238460
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. 荒漠梭梭基径-株高分布参数估计及其与林分因子模型研究[J]. 石河子大学,2018,33(4):1-9.
APA	汪少华,&杨婷.(2018).荒漠梭梭基径-株高分布参数估计及其与林分因子模型研究.西北林学院学报,33(4),1-9.
MLA	汪少华,et al."荒漠梭梭基径-株高分布参数估计及其与林分因子模型研究".西北林学院学报 33.4(2018):1-9.