为旱作区新修梯田土壤肥力和作物产量提升筛选适宜的耕作方式，选取静宁试验点和秦安试验点2个区域的新修梯田作为试验点布设3 a定位试验，研究普通旋耕、深松耕和立式深旋耕3种耕作方式对旱作区新修梯田土壤容重、有机质和碱解氮含量及马铃薯产量的影响。结果表明，在静宁试验点和秦安试验点，深松耕和立式深旋耕均不同程度降低了新修梯田挖方和填方部位的土壤容重，立式深旋耕的降低效果更显著。与普通旋耕相比，挖方部位0~20、20~40 cm土层立式深旋耕的土壤容重分别显著降低了5.26%~6.72%、6.52%~7.25%；填方部位的分别显著降低了5.38%~6.11%、6.72%~7.46%。立式深旋耕较深松耕不同程度增加了静宁试验点和秦安试验点新修梯田挖方和填方部位的土壤有机质和碱解氮含量，尤其对10~20、20~40 cm土层的效果更显著。挖方部位立式深旋耕的马铃薯产量较普通旋耕显著增加了22.17%~24.28%，填方部位显著增加了20.49%~31.10%。因此，立式深旋耕作是适合旱作区新修梯田前期快速熟化培肥的高效耕作方式。

To select appropriate tillage methods for improving soil fertility and crop yield in newly terraced farmlands of dry farming areas, a 3-year fixed-site experiment was conducted in newly constructed terraces of Jingning and Qin'an. 3 tillage methods suchat as normal rotary tillage (TT), deep loosening (DLT), and vertical deep rotary (VRT) were compared to assess their effects on soil bulk density, organic matter, available nitrogen contentd, and potato yield. Results showed that both DLT and VRT reduced soil bulk density in of the dug and filled sections of the terraces to varying degrees in Jingning and Qin'an, with VRT showing more significant reductions. Compared with TT, VRT reduced soil bulk density in the 0 to 20 cm and 20 to 40 cm layers of the dug section by 5.26% to 6.72% and 6.52% to 7.25%, respectively, and in the filled section by 5.38% to 6.11% and 6.72% to 7.46%, respectively. VRT also increased soil organic matter and available nitrogen content in both dug and filled sections at both test sites, especially in the 10 to 20 cm and 20 to 40 cm layers. Potato yield under VRT increased by 22.17% to 24.28% in the dug section and 20.49% to 31.10% in the filled section compared with TT. Therefore, vertical deep rotary tillage is an efficient tillage method suitable for rapid early-stage conditioning and fertilization of new terraced farmlands in dry farming areas.

S532；S153

甘肃省重点研发计划(23YFNA0018)；甘肃省农业科学院区域协同创新专项(2025GAAS01)；甘肃省农业农村厅科技支撑计划(KJZC-2024-22)；中央引导地方科技发展资金项目(25ZYJA025)。