贵州月亮山5种森林类型土壤生态化学计量特征研究

发布时间：2018-06-25 08:48

本文选题：森林类型 + 土壤　；参考：《热带亚热带植物学报》2016年06期

【摘要】：为了解贵州省月亮山森林土壤的化学计量特征,分层采集5种森林类型的土壤,测定C、N、P含量并分析化学计量特征。结果表明,5种森林类型0~20 cm土壤中变异最大的是P,20~100 cm土壤中变异最大的是C,最小的是N。5种森林类型0~10 cm土壤的C、N含量远高于中国陆地0~10 cm土壤的平均含量,而P含量远低于其平均含量。硬阔和软阔自然林土壤C、N、P含量存在明显差异,C含量为硬阔自然林软阔自然林,N和P含量基本呈现为软阔自然林硬阔自然林。不同森林类型土壤的C∶N为硬阔自然林软阔自然林,针阔混交林杉木和马尾松纯林。硬阔和软阔自然林、针阔混交林的C∶P、N∶P均随土层深度的增加而下降,而杉木和马尾松纯林的C∶P、N∶P随土层深度增加呈先下降后升高再下降的趋势,且均在30~50 cm处出现累积峰。相关分析表明0~100 cm土壤的C、N、P含量呈极显著正相关关系,土壤C含量、N含量与C∶N、C∶P、N∶P均呈极显著的正相关关系,P含量与C∶N呈极显著正相关关系(P0.001)。因此,贵州月亮山5种森林类型和不同土层的C、N、P含量及其化学计量特征存在显著差异。
[Abstract]:In order to understand the stoichiometric characteristics of forest soils in Yueliang Mountain, Guizhou Province, the soil samples of five forest types were collected in different layers, the contents of C ~ (+) N ~ (+) P were determined and the stoichiometric characteristics were analyzed. The results showed that the maximum variation of C in 0 ~ 20 cm soil of 5 forest types was C in 100 cm soil, and the lowest was CN content in 0 ~ 10 cm soil of N.5 forest types, which was much higher than the average content of 0 ~ 10 cm soil on land in China. P content was much lower than its average content. There was a significant difference in the content of N and P in soil between hard broad-leaved natural forest and soft broad-leaved natural forest. The content of C ~ (+) in soft broad-leaved natural forest was that the content of N and P in soft broad-leaved natural forest was basically the same as that in soft broad-leaved natural forest. The soil C _ (1) N of different forest types were soft broad-leaved natural forest, coniferous and broad-leaved mixed forest of Chinese fir and Masson pine pure forest. The C: Pu N: P of coniferous and broad-leaved mixed forest decreased with the increase of soil depth, while that of Chinese fir and Masson pine pure forest decreased first and then decreased with the increase of soil depth. The accumulative peak occurred at 30 ~ 50 cm. The correlation analysis showed that there was a very significant positive correlation between the content of C and N and the content of C and N in the soil of 0 ~ 100 cm soil. There was a very significant positive correlation between the content of P and the content of C _ (1) N (P _ (0.001). Therefore, there are significant differences in the contents and stoichiometric characteristics of Cnn P in five forest types and different soil layers in Yueliang Mountain, Guizhou Province.
【作者单位】：贵州大学资源与环境工程学院;贵州省山地资源研究所;华南理工大学环境与能源学院;贵州科学院;
【基金】：国家自然科学基金项目(31360123) 国家重大科学研究计划项目(2013CB956701) 中国科学院战略性科技先导专项子课题(XDA05050205)资助~~
【分类号】：S714

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