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当前位置: 首页 > 文章 > 川中丘陵县域土壤碳氮比空间变异特征及其影响因素 应用生态学报 2015,26 (1) 177-185
Position: Home > Articles > Spatial variability of soil C/N ratio and its influence factors at a county scale in hilly area of Mid-Sichuan Basin,Southwest China Chinese Journal of Applied Ecology 2015,26 (1) 177-185

川中丘陵县域土壤碳氮比空间变异特征及其影响因素

作  者：
罗由林;李启权;王昌全;张维;张浩;李林鲜;陈俊伟;马煜
单  位：
四川农业大学资源环境学院
关键词：
土壤碳氮比;空间变异;影响因素;川中丘陵
摘  要：
以四川仁寿县为案例区,通过实地采样分析了该紫色丘陵区县域尺度上土壤碳氮比的空间变异特征及其影响因素.结果表明:研究区表层土壤碳氮比(C/N)在4.84~21.79之间,平均值为11.93,变异系数26.3%,属中等程度的空间变异.半方差分析表明,土壤C/N的块金效应为73.0%,其空间分布受结构性因素和随机因素的共同影响,但受随机性因素的影响更大;土壤C/N的空间分布特征表现为西北和东南高、中部低的趋势,大部分区域土壤C/N处于10.0~13.5之间.成土母质、土壤类型、地形和土地利用方式对土壤C/N的影响显著(P<0.05);地形因子中高程和坡度与土壤C/N呈显著正相关关系(P<0.05),成土母质可解释土壤C/N 8.7%的空间变异,土类、亚类和土属的解释能力分别为3.8%、5.0%、8.7%,地形因子的解释能力为0.8%;土地利用方式对土壤C/N空间变异影响程度最高,达到23.9%,是调控该区域土壤C/N的重要因素.
译  名：
Spatial variability of soil C/N ratio and its influence factors at a county scale in hilly area of Mid-Sichuan Basin,Southwest China
作  者：
LUO You-lin;LI Qi-quan;WANG Chang-quan;ZHANG Wei;ZHANG Hao;LI Lin-xian;CHEN Jun-wei;MA Yu;College of Resources and Environment,Sichuan Agricultural University;
关键词：
soil C/N ratio;;spatial variability;;influence factors;;hilly area of Mid-Sichuan Basin
摘  要：
Spatial distribution characteristics of soil C / N ratio and its affecting factors at a county scale in hilly area of Middle Sichuan Basin were analyzed based on field sampling. Result indicated that soil C / N ranged from 4. 84 to 21. 79,with a mean value of 11. 93. The coefficient of variation was 26. 3%,which suggested soil C / N had moderate variability in this study area. The ratio of nugget to sill was 73. 0%,which suggested the spatial variability of soil C / N was determined by both structural and random factors,and the random factors played a more important role. The soil C / N was higher in northeast and southwest while the central part of the study area was characterized by relatively lower values of soil C / N. The soil C / N ranged from 10. 0 to 13. 5 in most parts of the study area. Parent material,soil type,topographic factors and land use type had significant impacts on soil C / N( P<0. 05). Soil C / N showed a significant positive correlation with elevation and slope( P<0. 05). The soil parent materials were able to explain 8. 7% of soil C /N spatial variability.The explanatory power of soil group,subgroup and soil genus were 3. 8%,5. 0%,8. 7%,respectively. Topographic factors showed the lowest explanatory power of only 0. 8%. However,land use type could explain 23. 9% of the spatial variability,which suggested that land use type was the dominant factor in controlling the spatial variability of soil C / N.

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