摘要
在栎林中多剖面采样测定土壤体积质量、非毛管孔隙度、稳渗率、有机质、pH等土壤因子。结果表明,各因子都具有一定的空间变异性,且垂直方向的变异大于水平方向。这种空间变异性的存在决定了在开展土壤研究中必须根据误差理论确定样本容量,才能保证测定结果具有可比性。统计分析结果显示,测定土壤稳渗率需要大量的样本,而测定其他因子,则仅需要20个以下样本即可以保证95%的可靠性。
By means of analyzing many soil sample’s physical and chemical characteristic such as soil bulk density,non-capillary porosity,infiltration capability,soil organic matter,soil pH value and so on in different Quercus variabilis forest soil profiles,the results showed that they have obvious roomage variability.And this roomage variability in vertical is more than that in horizontal.Therefore,we must base on the deviation theory to confirm the soil sample in different soil depth.And this is the only way to ensure the results to be correct and comparability.The results also showed it is needed to sampling decades samples even more than 100 when analyzing infiltration capability,but less than 20 samples when analyzing other soil characteristic.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第2期51-53,共3页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
江苏省自然科学基金重点资助项目(BK2001208)
南京市科技发展资助项目(20012117)
关键词
下蜀系黄土
栎林土壤
空间变异性
样本容量
Xiashu loess
Quercus variabilis forest soil
Soil roomage variability
Sampling number
