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对于单列、双列和偏置式圆盘耙,其偏角调节范围通常为10°～25°,而灭茬圆盘耙为30°～40°。这次田间试验是用一个耙片和一个多功能传感器进行的,采用裂区试验设计,将两块试验地的位置作为整区,把偏角、耙深和速度作为裂区。试验结果表明:对于双列和偏置式圆盘耙,除非有必要提高人士能力、增加耙深均匀性或两者兼而有之的情况下;对于灭茬圆盘耙,除非为了提高入土能力、减少偏斜或两者兼而有之的情况下,均应采用小偏角。对上述任何一种耙,只要能保证适当的耕作要求,都应使用最小耙深。灭茬圆盘耙的偏角为35°时,其总牵引阻力最大;偏角为45°时,其单位耙幅的牵引阻力最大。土壤对耙片的反力的合力,其作用点的位置表明土体影响耙片的几何形状。由于土壤反力是偏角的函数,所以这次田间试验的目的就是为了指导用户如何合理选择偏角、速度和耙深。
For single row, double row and offset disk harrows, the declination range is typically 10 ° to 25 ° and the stubble disk harrow is 30 ° to 40 °. The field experiment was conducted using a rake and a multi-function sensor. The split test design was used. The two test sites were taken as the whole area and the declination angle, rake depth and speed were taken as the split zone. The test results show that for double row and offset disk harrows, unless it is necessary to increase people’s ability to increase rake depth uniformity or both, for stubble disk harrows, except to increase soil penetration, Reduce the skew or both of the circumstances, should be used in a small declination. For any of these harrows, minimum harrow depth should be used as long as proper farming requirements are guaranteed. The total traction resistance of the harrow disc harrow with the declination angle of 35 ° is the largest. When the declination disc angle is 45 °, the traction resistance of the harrow disc unit is the largest. The resultant force of the soil on the reaction force of the rake blade indicates the geometry of the blade affected by the soil. Since the soil reaction is a function of declination, the purpose of this field trial is to guide the user in the rational selection of declination, speed and rake depth.