【摘要】 抚远县地处祖国边陲,白浆土分布面积大,所占耕地比重高。由于白浆层硬度高达20～50kg/cm2,阻碍土壤通气透水,土壤旱涝严重。在深松改土措施上,能够保持白浆土黑土层位置不变,使其下的白浆层和淀积层按适当比例混拌的三段式心土混层犁,可以使心土硬度降低到10～20kg/cm2,硬度降低效果保持5年以上。在国家及省有关方面的大力支持下,大面积推广三段式心土混层犁改良白浆土,对于挖掘低产土壤生产潜力,促进县域经济发展具有重要作用。更多还原

【Abstract】 The albic soil is largely distributed in Fuyuan county. Its subsoil with the depth from 20cm to 40cm is extremely hard with the hardness between 20～50 kg/cm~2 and hence, the root depth of major crops like soybeans is only 15-20cm, as a result, waterlogging and drought occurs frequently in the surface soil during the growing season.In practice, Subsoilers are conventionally used for the improvement of Albic soil. However, caused of the high content of silt in the soil, the soil hardness returns to the previous level just one year after operated.A Three-stage Subsoil Mixing plough, which can leave the topsoil undisturbed and mix the two subsoil layers into one to one ratio, was developed. The soil hardness with 10～20 kg/cm~2 after operated by the plough could be maintained for more than five years. With the national support, the large-scale extension of the plough will release the potential of the productivity of albic soil and enhance the economic development of Fuyuan county.更多还原