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土壤紧实度决定植株生长状况和产量,影响免耕系统的长期稳定性。凿形犁是减缓土壤紧实度的方法之一。该研究主要是为了评估凿形犁缓解土壤紧实度的作用效果。研究区一半长期免耕,另一半在免耕条件下使用凿形犁耕作,2009—2010年执行2 a。结果表明,应用凿形犁能有效降低0.4 m以上深度的土壤紧实度,免耕区土壤阻力值为2 000~4 000 k Pa的分布占总分布区间的70%;而凿形犁小区2 000 k Pa以下的土壤阻力值占57.3%,表明凿形犁耕作有效地改善了土壤环境条件。
Soil compaction determines plant growth and yield, affecting the long-term stability of the no-till system. Chisel plowing is one of the ways to slow soil compaction. The main purpose of this study was to evaluate the effect of chisel plows on soil compaction. Half of the study area was long-term no-till and the other half was chisel-plowed under no-till conditions for 2 years from 2009-2010. The results show that the application of chisel plow can effectively reduce the soil compaction depth of 0.4 m or more. The soil resistance value of no-tillage area ranges from 2 000 to 4 000 kPa, accounting for 70% of the total distribution. The chisel plow plot 2 Soil resistance below 000 kPa accounted for 57.3% of the total, indicating that chipping plowing effectively improved soil environmental conditions.