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首页> 外文期刊>Journal of geographical sciences >Distribution characteristics of SOM and nitrogen on the eastern slope of Gongga Mountain
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Distribution characteristics of SOM and nitrogen on the eastern slope of Gongga Mountain

机译：贡嘎山东坡SOM和氮素分布特征。

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摘要

The distribution of soil organic matter (SOM) and nitrogen on Gongga Mountain was studied in this paper. The results showed that the content of SOM and nitrogen (N) of A horizon had an ascending trend with the increase of the elevation. The vegetation types distributed higher than the mixed broad-leaved and coniferous forest have the irregular trends. In the transitional zone vegetation such as mixed trees and treeline, the content of SOM and N is higher than other vegetation types. The distribution of SOM and N of A horizon is dependent on the synthetic effect of climate and vegetation types. The vertical distribution of SOM and N in soil profiles has the similar trends for all kinds of vegetation types, i.e., the content of A horizon is higher than that of the B and C horizons, which is the same to the distribution of dead animal and plant in soil. The soil C:N is between 7 and 25, which is relatively low comparing to the appropriate C:N of 25-30. The ratio of soil carbon to nitrogen (C:N) increases with the increase of the elevation, but its vertical distribution in soil horizons varies with different vegetation types. The N exists in SOM mainly in the form of organic nitrogen, and the soil C: N correlates significantly with SOM.
机译：研究了贡嘎山土壤有机质和氮素的分布。结果表明，随着海拔的升高，A层的SOM和氮（N）含量呈上升趋势。植被类型的分布高于阔叶和针叶混交林。在过渡带植被（例如混交林和林木）中，SOM和N的含量高于其他植被类型。 SOM和N层的N的分布取决于气候和植被类型的综合影响。不同植被类型下土壤剖面中SOM和N的垂直分布趋势具有相似的趋势，即A层的含量高于B层和C层的含量，这与死动物和动物的分布相同。植物在土壤中。土壤C：N在7到25之间，与适当的25:30的C：N相比相对较低。土壤碳氮比（C：N）随着海拔的升高而增加，但其在土壤层中的垂直分布随植被类型的不同而变化。氮以有机氮的形式存在于土壤有机质中，土壤碳氮与土壤有机质显着相关。

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