摘要
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.
出处
《干旱区资源与环境》
CSSCI
CSCD
2001年第2期80-84,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金!项目№ .3 9860 0 2 0
3 9860 0 5 7