CAJ | 학술논문

对重庆四面山杉木纯林、杉木×马尾松、杉木×马尾松×木荷、木荷×石栎×枫香×香樟、木荷×石栎人工林进行了有机碳储量研究。运用网格取样法取样，每个样地各层各取样81个，共计取样810个。结果表明：（1）林分类型不同，A层土壤有机碳含量总体差异显著（p<0.05）。在此五种林分类型中，土壤平均有机碳含量以杉木人工纯林为最高，石栎木荷枫香香樟人工混交林为最小；B层土壤有机碳含量总体差异不显著（p>0.05）。在垂直剖面上，五种人工林均差异显著（p<0.05），且表现出随着土层深度的增加，林下土壤有机碳含量随之减小，体现出土壤有机碳含量的表聚作用。（2）有机碳储量规律基本与土壤有机碳含量规律一致。在垂直剖面上，此五种人工林有机碳储量均差异显著(p<0.05)，表现出随着土层深度的增加而减小的规律。不同林种类型、同一土层深度或是不同土层深度、同一林种类型其有机碳储量变异系数大小均不一样，这说明此五种林地土壤普遍存在空间异质性且其异质程度不一样。（3）就 A 土层而言，本研究区五种人工林平均有机碳密度为5.34 kg?m-2，比相关研究的重庆市土壤有机碳密度3.11 kg?m-2，全国森林土壤有机碳密度4.24 kg?m-2，全国土壤有机碳密度2.67 kg?m-2等分别多出71.70%，25.94%，100%。
대중경사면산삼목순림、삼목×마미송、삼목×마미송×목하、목하×석력×풍향×향장、목하×석력인공림진행료유궤탄저량연구。운용망격취양법취양，매개양지각층각취양81개，공계취양810개。결과표명：（1）림분류형불동，A층토양유궤탄함량총체차이현저（p<0.05）。재차오충림분류형중，토양평균유궤탄함량이삼목인공순림위최고，석력목하풍향향장인공혼교림위최소；B층토양유궤탄함량총체차이불현저（p>0.05）。재수직부면상，오충인공림균차이현저（p<0.05），차표현출수착토층심도적증가，림하토양유궤탄함량수지감소，체현출토양유궤탄함량적표취작용。（2）유궤탄저량규률기본여토양유궤탄함량규률일치。재수직부면상，차오충인공림유궤탄저량균차이현저(p<0.05)，표현출수착토층심도적증가이감소적규률。불동림충류형、동일토층심도혹시불동토층심도、동일림충류형기유궤탄저량변이계수대소균불일양，저설명차오충임지토양보편존재공간이질성차기이질정도불일양。（3）취 A 토층이언，본연구구오충인공림평균유궤탄밀도위5.34 kg?m-2，비상관연구적중경시토양유궤탄밀도3.11 kg?m-2，전국삼림토양유궤탄밀도4.24 kg?m-2，전국토양유궤탄밀도2.67 kg?m-2등분별다출71.70%，25.94%，100%。
In this paper ,we had researched the soil organic carbon storage under five plantations, namely pure fir forest(cunninghamia lanceolata), fir and pine(pinus massoniana) mixed forest, and three other mixed broad-leaved forest(Cunninghamia lanceolata×Pinus massoniana×Schima superb, Schima superba×Cinnamomum camphora×Lithocapus glaber×Liquidambar formsana and Schima superba×Lithocarpus glaber), in the simian mountain of Chongqing. A grid sampling method was used to take 81 samples in every layer of every sample plot, totally 810 samples. The results indicated that (1) there is a significant difference (p < 0.05) in the average SOC content of A layer under different forest types. The pure fire forest(cunninghamia lanceolata) had the highest SOC content and the Schima superba×Cinnamomum camphora×Lithocapus glaber×Liquidambar formsana had the lowest. The difference in the average SOC content of B layer in different forest types was not significant (p>0.05). In the vertical section, five kinds of plantations all showed a significant difference (p<0.05), and the SOC content decreased with depth, reflecting the assembled action in the surface layer. (2) The rule of soil organic carbon storage was almost consistent with that of soil organic carbon content. In the vertical section,the organic carbon storage under five plantations were significant different (p<0.05) and decreased with the soil depth. The variable coefficient of the organic carbon storage were quite different between the soil depths or between the forest types, indicating that the spatial heterogeneity was ubiquitous and the degree of heterogeneity were different. (3) In terms of the A soil layer, the average organic carbon density of the five plantations was 5.34 kg?m-2, which was 71.70%higher than the previou results (3.11 kg?m-2) in Chongqing, 25.94%higher than the national forest soil organic carbon density (4.24 kg?m-2), 100%higher than the national soil organic carbon density (2.67 kg?m-2).