联合收割机作业中割台掉穗的原因及排除□李彦文联合收割机在作业中经常出现收割台掉麦穗头的现象，造成不应有损失，其原因是由于对拨禾轮的调整不当。因此，只要正确调整好拨禾轮，收割台掉穗头的现象即可排除。（１）拨禾轮转速的调整。拨禾轮压板的线速度应比收割机的... Causes and Elimination of Header Cut-off in Combine Harvester Operations □ Li Yanwen Combine harvesters frequently cause the head of wheat to fall off the header in operation, resulting in no loss. This is due to the improper adjustment of the reel. Therefore, as long as the correct allocation of reel, header out the head of the phenomenon can be ruled out. (1) Reel speed adjustment. The reel speed of the platen should be harder than the harvester ...