摘要
不同的利用方式能够改变土壤有机碳在土层中的分布,进而对土壤有机碳及土壤碳储量产生影响。本研究以贵州省黄平县旧州镇紫色土为研究对象,通过对0~40 cm土层由表及里每20 cm进行取样,对不同的耕作利用方式土壤有机碳含量进行测定数据统计分析,探索在不同土壤耕作利用方式下,土壤有机碳含量在垂直剖面中的关系。研究结果表明,在不同土壤耕作利用方式下,耕作层的有机碳含量变化幅度较大,而在20~40 cm之间的有机碳变化幅度较小。且在土层0~40 cm剖面上土壤有机碳的含量均由土壤深度的增加而下降,即有机碳含量顺序为菜园地>水稻土>玉米地,菜园地有机碳含量最高,为11.87 g/kg,玉米地有机碳含量最低,为3.07 g/kg,降低幅度不一致,以菜园地下降最为明显。
Different utilization methods can change the distribution of soil organic carbon in the soil layer,and then affect the soil organic carbon and soil carbon storage.This study took the purple soil of Jiuzhou Town,Huangping County,Guizhou Province as the research object.Through sampling the 0-40 cm soil layer from the surface to the bottom every 20 cm,the soil organic carbon content of different tillage and utilization methods were measured and statistical analysis of the soil organic carbon content data,to explore the relationship between soil organic carbon content in the vertical profile under different soil tillage and utilization methods.The results showed that under different tillage and utilization methods,the variation range of organic carbon content in the tilled layer was large,but the variation range of organic carbon content between 20 cm and 40 cm was small.In the 0-40 cm soil layer,the soil organic carbon content decreased with the increase of soil depth,that was,the relationship of organic carbon content was vegetable plot>paddy soil>corn field.The highest organic carbon content of vegetable plot was 11.87 g/kg,and the lowest organic carbon content of corn field was 3.07 g/kg.The decrease amplitude was inconsistent,and the decrease was most obvious in vegetable plot.
作者
宋刚
吴僭
杨梅
胡腾胜
侯春华
龙永根
SONG Gang;WU Jian;YANG Mei;HU Tengsheng;HOU Chunhua;LONG Yonggen(Southeast State Soil and Fertilizer Station of Kai Li,Kaili Guizhou 556000,China)
出处
《耕作与栽培》
2023年第3期53-57,共5页
Tillage and Cultivation
基金
2009—2020年化肥减量增效项目。
关键词
土壤有机碳
土地利用方式
紫色土
soil organic carbon
the land use method
purple soil
