建设水平梯田是水土流失严重地区改上治水、实现稳产高产的根本性措施。但是机修梯田由于在修建过程中造成梯田内侧土壤母质外露，土壤结构变劣，肥力下降，而外侧大部分是堆积的原坡地耕层土壤。针对这一情况，采取“两作种植法”即同一梯田内外侧分别种植两种不同的作物。本 The construction of terraced fields is a fundamental measure to change water to control water loss in areas where soil and water loss are serious and achieve stable and high-yielding. However, due to the exposed soil parent material in the terraced fields during the construction, the mechanical structure of the terraced rice fields deteriorates the soil structure and decreases the fertility. Most of the outside is the plowed soil of the original slope. In response to this situation, two kinds of planting methods were adopted, that is, two different crops were planted on the inside and the outside of the same terrace respectively. this