乌兰布和沙漠天然白刺适应性群团抽样技术的研究  

Study on Adaptive Cluster Sampling Method of Natural Nitraria Tangtorum in Ulanbuh Desert

作　　者：徐兰英[1] 李凤日[1] 

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《生物数学学报》2010年第4期680-692,共13页Journal of Biomathematics

基　　金：国家自然科学基金国际合作项目(30510103195);国家社会公益研究专项资金项目(2005D IB5J142)

摘　　要：以乌兰布和沙漠地区天然白刺为具体研究对象,对不同抽样方法获取的数据进行了分析.研究结果表明,当适应性标准大于等于占位单元平均数时,适应性群团抽样比简单随机抽样更有效,并且可以保证估计精度;初始抽样比例越大,总体均值估计值和抽样相对效率越稳定.在该研究区域采用二阶适应性群团抽样,可以达到估计精度,但与简单随机抽样和适应性群团抽样相比效率偏低.In this paper,Nitraria tangtorum in the Ulan Buh Desert was studied by varied sampling techniques.Results showed that,when adaptive standard is greater or equal to the average of pilot unit,the adaptive cluster sampling is more efficient than simple random sampling,and can ensure estimation accuracy.The relative efficiency and average estimation of overall sample increase with initial sample proportion.The second-order adaptive cluster sampling used in this study area can achieve the estimation accuracy,but compared with simple random sampling and adaptive cluster sampling,it has a low efficiency.

关 键 词：适应性群团抽样 估计精度 相对效率 乌兰布和沙漠 

分 类 号：Q-9[生物学] N31[自然科学总论]