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以位于西南大学试验农场的紫色土长期免耕试验田为研究对象,探讨不同耕作方式-冬水田平作(DP)、水旱轮作(SH)、垄作免耕(LM)、厢作免耕(XM)和垄作翻耕(LF)对紫色水稻土总有机碳、活性有机碳及稳态碳的影响。结果表明,在0～60 cm的土壤深度内,不同耕作方式下总有机碳的平均含量为LM(22.74 g/kg)>DP(14.57 g/kg)>XM(13.73 g/kg)>LF(13.10 g/kg)>SH(11.92 g/kg);活性有机碳的平均含量为DP(3.67 g/kg)>LF(3.49 g/kg)>LM(3.28 g/kg)>XM(3.17 g/kg)>SH(2.69 g/kg);稳态碳占土壤总有机碳的百分比为LM(85%)>SH(78%)>XM(77%)>LF(75%)>DP(74%)。长期垄作免耕具有明显的碳截存效应和良好的固碳能力。
Taking the long-term no-tillage purple soil trial field located in the pilot farm of Southwest University as the research object, this paper studied the effects of different tillage methods-winter paddy field flattening (DP), water and drought rotation (SH), ridgeless tillage (LM) And tillage with tillage (LF) on total organic carbon, active organic carbon and steady state carbon in purple paddy soil. The results showed that the average contents of total organic carbon under different tillage regimes were LM (22.74 g / kg)> DP (14.57 g / kg)> XM (13.73 g / kg)> LF (3.23 g / kg)> SH (11.92 g / kg); the average content of active organic carbon was DP (3.67 g / kg) kg)> SH (2.69 g / kg). The percentages of steady-state carbon in soil total organic carbon were LM (85%) SH (78%) XM 77% LF 75% ). Long-term ridge tillage has obvious carbon sequestration effect and good carbon sequestration.