内蒙古典型草原动态监测的取样问题

The Problems of Selecting Samples inDynamical Inspect of Typical Grassland

本文用数理统计方法 ,对内蒙古典型草原地带的羊草 +大针茅草原群落 2 0年 ( 1 981-2 0 0 0 )的采样数据进行分析、检验 ,选择出群落中的重要种 ,验证了草原的物种生物量服从正态分布 ,并证明了在采样中取 1 0个样方的生物量统计 ,即可替代 2

Based on the methods of mathematical statistics,the paper tested and analyzesed the data of the nondegenerate grassland located at the station of XiLinGuoLe grassland in recent 20 years. From the analysis,five important species were selected,and the results also showed that their biomass data abide by normal distribution. The difference between the average biomass of 10 samples and that of 20 samples is so small that we can collect 10 samples afterward.