摘要
【目的】提高土体厚度和固碳效率,探索一种适于紫色土坡耕地土壤碳库扩容与土壤健康提升的耕作方式。【方法】利用田间小区试验,设置常规耕作(CK)、垂直超深旋耕等高耕作(T1)和顺坡耕作(T2)3个处理,研究垂直超深旋耕对紫色土植烟土壤有机碳分布及土壤碳库管理指数的影响。【结果】垂直超深旋耕能够显著提升土壤有机碳(SOC)含量,特别是在上坡能够增加整个剖面的SOC含量,而在中坡和下坡主要影响深层土壤(>20 cm)的SOC含量。垂直超深旋耕增大了上坡耕层(0~20 cm)和中坡、下坡深层(20~30 cm)土壤易氧化有机碳(ROC)含量。两种垂直超深旋耕处理都明显提升土壤有机碳储量,T1和T2处理与CK相比土壤有机碳储量平均提升49.35%和20.18%,说明T1处理的固碳效果更好。T1和T2处理显著提高上坡与下坡的碳库管理指数。T1和T2处理的农艺性状明显优于CK。【结论】垂直超深旋耕能够快速增加土壤有机碳储量和提升碳库管理指数,是紫色土植烟土壤固碳增汇和培育健康植烟土壤的一种可行技术手段。
[Objective]The present paper aimed to increase the soil thickness and carbon sequestration efficiency,and to explore a farming method suitable for expanding the soil carbon pool and enhancing soil health in purple soil sloping cropland.[Method]The field plot experiments were conducted and three treatments were established:Conventional tillage(CK),the across-slope plough(T1)and along-slope plough(T2)of deep vertical rotation tilage.The effects of deep vertical rotation tillage on the distribution of soil organic carbon and the soil carbon pool management index in purple soil used for tobacco cultivation were investigated.[Result]Deep vertical rotation tllage could significantly increase the soil organic carbon(SOC)content,especially in the whole section of the upslope while the SOC content of the deep soil(>20 cm)was mainly affected in the midslope and downslope.Deep vertical rotation tillag increased the content of readily oxidizable carbon(ROC)in the upslope layer(0-20 cm)and the deep layer(20-30 cm)of midslope and downslope.Both deep vertical rotation tillage treatments significantly increased the soil organic carbon storage,T1 and T2 treatments increased by 49.35%and 20.18%on average compared with CK,indicating that the carbon fixation effect of T1 treatment was better.The T1 and T2 treatments significantly improved the carbon pool management index for both the upslope and downslope.The agronomic traits of treatments T1 and T2 were significantly better than CK.[Conclusion]Deep vertical rotation tillag can rapidly increase the soil organic carbon storage and improve the carbon pool management index,which is a viable technical means for carbon sequestration and enhancement in purple soil for tobacco cultivation,as well as for nurturing healthy tobacco-growing soil.
作者
韩洪
俞世康
李富程
阳新奎
顾会战
王栋
王彬
母明新
HAN Hong;YU Shi-kang;LI Fu-cheng;YANG Xin-kui;GU Hui-zhan;WANG Dong;WANG Bin;MU Ming-xin(School of Environment and Resources,Southwest University of Science and Technology,Mianyang,Sichuan 621010,China;Sichuan Tobacco Company Guangyuan City Company,Guangyuan,Sichuan 628000,China)
出处
《西南农业学报》
北大核心
2025年第5期1022-1029,共8页
Southwest China Journal of Agricultural Sciences
基金
中国烟草总公司四川省公司科技项目(SCYC202305、SCYC202106)。
关键词
紫色土
土壤健康培育
垂直超深旋耕
固碳增汇
碳库管理指数
Puple soil
Soil health cultivation
Deep vertical rotation tllage
Carbon sequestration and enhancement
Carbon pool management index
