在无开沟器播种的情况下,无须事前开沟,种子被强制地压人到土壤内的一定深度。种子射入土壤过程的动力学依赖于许多因素。试验数据表明,如果喷射装置的管口末端到土壤表面的距离大于10厘米(H>10厘米),则种子的射入纯粹是靠重力。如果管口距土壤表面很近,甚至深 In the absence of opener sowing, there is no need for pre-ditching, and the seeds are forcibly forced into the soil to a certain depth. The kinetics of seed injection into the soil depend on many factors. Test data indicate that seed injection is purely gravity-based if the nozzle tip of the jetting device is more than 10 cm (H> 10 cm) from the soil surface. If the nozzle is close to the surface of the soil, or even deep