The average pH of penetrating rainfall of the hybrid ecosystem is 6.40, while the second shrub-forest is 7.02. The nutrition factors of throughfall (including P, K, Na, Ca, Mg etc) are not relation with rainfall characters in the two ecosystems.
3．油松华山松混交林生态系统穿透雨平均pH为6.40，次生灌丛为7.02，两生态系统穿透雨水样中P、K、Na、Ca、Mg等元素浓度含量均与降雨特征表现出不相关关系。
参考来源 - 油松华山松人工混交林与次生灌丛水源涵养与养分维持能力比较研究·2,447,543篇论文数据，部分数据来源于NoteExpress
地理成分分析表明，该区灌丛具有次生、退化的性质。
The analysis of geographical elements demonstrates that the shrub vegetation is secondary and degraded.
灌丛、原生林和次生林中主要分布有森林型小型哺乳动物，聚为一类，为森林群落型；
Small mammals of forest type are mainly distributed in shrubland, secondary forests and primary forest, which are clustered into one group.
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