用现代大马力拖拉机进行高速耕作时,由于犁的牵引阻力较大,发动机往往在不满负荷和滑转功率损失较大的状态下作业,因此发动机的功率不能得到充分的利用。由于铧式犁不可能保证土壤的破碎和混合始终能达到要求的程度,因此在播种前往往还要进行补充整地,结果增加了 When using modern high-powered tractors for high-speed tillage, the power of the engine can not be fully utilized due to the plow’s traction resistance is large and the engine is often operated under a condition of large load loss and slip power loss. Since it is impossible for the plow to guarantee that the soil will be crushed and mixed consistently to the extent required, it is often necessary to replenish the soil prior to sowing, resulting in an increase