CAJ | 학술논문

三段式心土混层犁为改造白浆土土体构型实现了“上翻20 cm，下混30～ 40 cm”的农艺要求，白浆层与淀积层的土壤混拌率Mx达到0.7，白浆层向淀积层的土壤转移率TAw→B达到了0.3。0～40 cm土层土壤物理性状明显改善，疏松透水，硬度下降，农田表涝现象得到缓解，效果持久稳定，连续4年测定，耕翻一次后至第4年其土壤硬度仍然明显低于常规耕作田块。1996年～1998年大面积示范试验，使用该犁耕翻地块作物增产达10%～27.9%。该犁作业幅宽50 cm，深度60 cm，总牵引阻力30～35 kN。
삼단식심토혼층리위개조백장토토체구형실현료“상번20 cm，하혼30～ 40 cm”적농예요구，백장층여정적층적토양혼반솔Mx체도0.7，백장층향정적층적토양전이솔TAw→B체도료0.3。0～40 cm토층토양물이성상명현개선，소송투수，경도하강，농전표로현상득도완해，효과지구은정，련속4년측정，경번일차후지제4년기토양경도잉연명현저우상규경작전괴。1996년～1998년대면적시범시험，사용해리경번지괴작물증산체10%～27.9%。해리작업폭관50 cm，심도60 cm，총견인조력30～35 kN。
Based on the field tests and the investigations, a three-sta ge subsoil mixing plough, as a result of the international cooperation of China and Japan, was developed. This plough could meet the need for the improvement o f Planosol solum by mixing the second (Aw) and Third (B) horizons, while leaving the first (Ap) horizon undisturbed. The mean soil mixing rate, M x was 0.7 and the mean transfer rate of the Aw to the B horizon, T Aw→B was a bout 0.3. With the working width of 50 cm and the working depth of 60 cm, the to tal draught of the plough was about 30 kN under the normal field moisture condit ion. This draught requirement made the plough easily use in practice in China. I n the field operated by the plough, good results for the soil physical propertie s were achieved. During the wet season, the excessive soil surface water could q uic kly penetrate into the subsoil. No recovery of soil hardness was observed after ploughing for four years, and hence the long term soil improvement was achieved. The yield increasing rate was 10%～27.9%, according to the large-scale extensi on tests.