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栽培药材川续断地上部分体积估算的最优样方选择
引用本文:朱寿东,刘慧平,黄璐琦,王新村,张小波,薛晓娟,穆晓东,程洁.栽培药材川续断地上部分体积估算的最优样方选择[J].植物生态学报,2012,36(2):151-158.
作者姓名:朱寿东  刘慧平  黄璐琦  王新村  张小波  薛晓娟  穆晓东  程洁
作者单位:北京师范大学地理学与遥感科学学院, 北京 100875;
中国中医科学院中药研究所, 北京 100700;
贵州同济堂制药有限公司, 贵阳 550009;
北京师范大学全球变化与地球系统科学研究院, 北京 100875
基金项目:国家高科技产业化项目,国家863计划,国家自然科学基金,国家科技支撑计划
摘    要: 以贵州省黔南州龙里县内人工栽培的川续断(Dipsacus asperoides)为研究对象, 就如何选择最优样方的面积和数目来估算川续断地上部分体积进行了研究。首先运用球缺模型计算栽培川续断的地上体积, 然后利用基于套状样方的样带调查法研究估算川续断体积时的最优样方面积, 最后利用方差法计算最优采样数目。结果表明: (1)在只考虑相对平均值和相对消耗时, 25 m × 25 m 是最优样方面积; 在此基础上进一步考虑到样方的边界效应和单位面积地上体积相对平均值的变化, 得出25 m × 50 m 是最优样方面积。(2)如果预计置信度1?α 是0.9, 绝对误差限度d 是0.12, 总体方差S2 按照常规取0.25, 则25 m × 50 m 对应的最佳样方数目是25。(3)该研究实际采集了25 个25 m × 50 m 的样方, 计算后得到整个栽培园地(面积为72 696.24 m2)川续断的总体积90%的近似置信区间为1 909.798 m3, 2 214.762 m3]。

关 键 词:球缺模型  边界效应  套状样方  最优样方  相对消耗
收稿时间:2011-09-07
修稿时间:2012-01-04

Selection of optimum quadrat size and number for estimating aboveground volume of cultivated Dipsacus asperoides
ZHU Shou-Dong , LIU Hui-Ping , HUANG Lu-Qi , WANG Xin-Cun , ZHANG Xiao-Bo , XUE Xiao-Juan , MU Xiao-Dong , CHENG Jie.Selection of optimum quadrat size and number for estimating aboveground volume of cultivated Dipsacus asperoides[J].Acta Phytoecologica Sinica,2012,36(2):151-158.
Authors:ZHU Shou-Dong  LIU Hui-Ping  HUANG Lu-Qi  WANG Xin-Cun  ZHANG Xiao-Bo  XUE Xiao-Juan  MU Xiao-Dong  CHENG Jie
Affiliation:School of Geography, Beijing Normal University, Beijing 100875, China;

Institute of Chinese Material Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China;

Guizhou Tongjitang Pharmaceutical Co., Ltd., Guiyang 550009, China;

College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China
Abstract:Aims In the traditional Chinese medicine resources survey process, quadrat size and number must be determined before surveying. Our objective is to determine how to select the optimal quadrat size and number for Dipsacus asperoides.
Methods We examined D. asperoides cultivated in Longli, Qiannan Autonomous Prefecture, Guizhou Province. We first calculated aboveground volume of D. asperoides by a segment model. Then we selected the optimal quadrat size and number by using the quadrat-based transect survey method, and calculated the optimal quadrat number by the variance method.
Important findings When only considering of the relative mean of aboveground volume and relative time costs, 25 m × 25 m is the optimal size. But when further considering quadrat boundary effects and variation in relative mean of the aboveground volume, the optimal size is 25 m × 50 m. If the expected confidence level is 0.9, the absolute margin of error is 0.12, the population variance S2 obtained conventionally is 0.25 and the optimal quadrat number is 25. This study sampled 25 quadrats of 25 m × 50 m within the entire area of the cultivated garden (72 696.24 m2). The total aboveground volume of D. asperoides with approximately 90% confidence located in the extent is 1 909.798 m3, 2 214.762 m3]. Results showed that the optimal quadrat size from the nested quadrats method and the segment model are useful in estimating the aboveground volume of cultivated D. asperoides, and they can provide a reference for other surveys.
Keywords:a segment model  boundary effects  nested quadrats  optimal quadrats  relative cost
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