生态学杂志2018，Vol.37Issue(11)：3487-3492,6.DOI:10.13292/j.1000-4890.201811.001
土壤物理性状检测的取样方法和数量——以祁连山东段高寒草甸为例
Sampling method and sample size for studying soil physical property: A case of alpine meadow in eastern Qilian Mountain
摘要
Abstract
Soil heterogeneity is one of the major factors that influence vegetation heterogeneity and habitat selection of soil fauna and rodents. Rational soil sample size and distribution is very important for reflecting the useful information of soil. In this study,we investigated soil compaction, soil bulk density,and soil moisture in alpine meadow of the eastern Qilian Mountain,by setting up 121 sampling points within a 110 m × 110 m plot. We compared the results of different sampling sizes ( 3 - 36 sampling points) and three sampling methods ( random sampling,grid sampling,and diagonal sampling) with entire sampling method ( 121 sampling points) . We found that: ( 1) The standard errors of sampling decreased with increasing the sampling sizes using different sampling methods. ( 2) Among the three sampling methods,the random sampling method was the best one. Sampling size of ＞18 points could meet accuracy requirement under 90％ and 95％ confidence level. We suggest that the sampling effects should be considered according to the study purpose and grassland type.关键词
土壤异质性/取样方法/取样精度Key words
soil heterogeneity/sampling method/sampling accuracy引用本文复制引用
楚彬,张振粉,周建伟,王婷,花立民..土壤物理性状检测的取样方法和数量——以祁连山东段高寒草甸为例[J].生态学杂志,2018,37(11):3487-3492,6.基金项目
国家重点研发计划项目( 2017YFC0504803,2016YFC0501902) 和甘肃省高校协同创新科技团队支持计划项目资助. （ 2017YFC0504803,2016YFC0501902）
