川西亞高山3種典型森林土壤碳礦化特征
[Abstract]:In order to understand the influence of forest transformation on the process of soil carbon mineralization, the soil carbon mineralization process of 3 typical forests (natural forests, birch secondary forests and spruce artificial forests) in Western Sichuan was monitored by indoor culture method. The results showed that the rate of carbon mineralization in 3 forest soils decreased with the increase of culture time, and the amount of mineralization accumulated at any time. The carbon mineralization rate and accumulation of soil organic layer were significantly higher than that of the corresponding mineral soil layer. In soil organic layer, natural forest and birch secondary forest soil carbon mineralization rate and accumulation were significantly higher than that of spruce plantation, but there were no significant differences in 3 kinds of forest in mineral soil layer. At the end of culture, 3 kinds of forest organic layers were mineralized. The amount of total organic carbon was 11%, 8% and 11%, respectively, and the soil layer was 4%, 6% and 4%., respectively. The soil layer and the incubation time and the interaction of three had significant influence on the soil carbon mineralization and accumulation. The soil biochemical characteristics were closely related to the soil carbon mineralization rate and accumulation amount. The single index model could be well fitted. In summary, forest transformation has a significant effect on soil carbon mineralization in subalpine areas of Western Sichuan, mainly in the soil organic layer.
【作者單位】: 四川農(nóng)業(yè)大學生態(tài)林業(yè)研究所 四川省林業(yè)生態(tài)工程重點實驗室;四川農(nóng)業(yè)大學高山森林生態(tài)系統(tǒng)定位研究站 長江上游生態(tài)安全協(xié)同創(chuàng)新中心;
【基金】:國家自然科學基金項目(31570601,31570445,31500509) 中國博士后科學基金項目(2013M540714,2014T70880)資助~~
【分類號】:S714
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