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西北太平洋内陆半干旱区常规种植制度是冬小麦—休闲2 a轮作制,在这一轮作制度中,不采取保护性耕作措施,地表因扰动而导致严重的土壤侵蚀。采取完全随机排列试验,观测了免耕(NT)和常规耕作(TP)两种种植方式、冬小麦—春豌豆—冬小麦—休闲4 a轮作制下的地表覆盖率、土壤入渗率、径流量和土壤侵蚀量,结果表明:免耕的覆盖率为81%、入渗率为41 mm/h,明显高于常规耕作(分别为59%、14 mm/h),免耕的径流量为0.4 mm、侵蚀量为10 kg/hm2,低于常规耕作(分别为0.4 mm、21 kg/hm2),免耕有利于研究区域土壤侵蚀控制。
Conventional cropping systems in the inland semi-arid region of the western North Pacific are winter wheat-fallow 2-a rotation systems. In this rotation system, no conservation tillage measures are taken and ground surface disturbances lead to severe soil erosion. Totally randomized experiments were conducted to investigate the effects of NT and TP on the surface coverage, soil infiltration rate, runoff and soil moisture during winter wheat-spring pea-winter wheat-leisure 4-year rotation The results showed that the no-till coverage was 81%, the infiltration rate was 41 mm / h, significantly higher than that of conventional tillage (59% and 14 mm / h, respectively), and no-tillage runoff was 0.4 mm , The erosion amount is 10 kg / hm2, which is lower than the conventional tillage (0.4 mm, 21 kg / hm2, respectively). No-tillage is beneficial to the control of soil erosion in the study area.