近30年川中丘陵区不同土地利用方式土壤碳氮磷生态化学计量特征变化  

Last 30a Changes of C, N and P Ecological Stoichiometry of Different Land Use Types in Hilly Area of Mid-Sichuan Basin, Southwest China

作　　者：罗由林 李启权[1,2] 王昌全[1] 辛志远[1] 王永豪[1] 宋安军[1] 万傲然 唐科[3] 

机构地区：[1]四川农业大学资源学院,成都611130 [2]四川农业大学资源与地理信息技术研究所,成都611130 [3]重庆大学法学院,重庆400044

出　　处：《土壤》2016年第4期726-733,共8页Soils

基　　金：国家自然科学基金项目(4120124);四川省科技支撑计划项目(四川省–中科院合作项目2012JZ0003)资助

摘　　要：基于1981年第二次土壤普查数据和2012年实地采样数据,分析了紫色丘陵区1981—2012年不同土地利用方式下表层土壤碳氮磷含量及生态化学计量特征变化。结果表明:研究区近30年来土壤碳、氮含量增幅分别为109.98%、27.27%,磷含量基本稳定。1981年土壤C︰N︰P比为7.28︰1︰1,2012年C︰N︰P比为16.41︰1.37︰1。各土地利用方式土壤碳、氮含量均有不同程度提升,尤以林草地、园地提升最为明显;水田、旱地、园地土壤磷含量基本稳定而林草地下降明显;土壤C/N、C/P、N/P均有提升。30年来表层土壤碳储量明显增加,氮储量基本稳定而磷储量有所下降。Based on the 2ndNational Soil Survey Data in 1980s and the measured data of 555 soil samples （0-20 cm） in 2012, the changes of C, N and P ecological stoichiometry of different land use types over 30 years were analyzed in this paper. The results showed that soil carbon and nitrogen increased by 109.98% and 27.27% respectively, while phosphorus content remained stable in the last 30 years. Soil C：N：P ratio of 1981 was 7.28 ： 1 ; 1 and was 16.41 ; 1.37 ： 1 in 2012. The contents of soil carbon and nitrogen all increased in each land use type, especially in forest and grassland and garden; the contents of soil phosphorus retained stable in paddy field, dry land and orchard while decreased significantly in forest and grassland. Soil C/N, C/P and N/P increased in each land use type. In the last 30 years, carbon storage of topsoil increased significantly, nitrogen storage remained stable and phosphorus storage declined.

关 键 词：土地利用方式 碳 氮 磷 生态化学计量特征 

分 类 号：S152.4[农业科学—土壤学] S153.6[农业科学—农业基础科学]