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在南方麦地播种前后开挖排灌沟,一般要求沟深30～35厘米、沟宽11～14厘米,沟距330厘米,具有降低地下水位、排除地表积水、干旱时可以灌水的作用,是三麦丰产的重要措施之一。目前大多用人力进行开沟,一般每人每天最多能开沟100米,劳动强度大,工效低,迫切要求实现开沟机械化。现有开沟机具类型较多,有圆盘式、链齿式、螺旋式和开沟犁等,但使用较多的还是圆盘式开沟机。
Before and after sowing in the southern corn fields irrigation and drainage ditch, the general requirements of furrow 30 to 35 cm, 11 to 14 cm in groove width, spacing 330 cm, with a lower groundwater level, excluding surface water, water can be irrigated when drought is One of the important measures of three-wheat high yield. At present, most human ditches are used, and most ditches can be dug up to 100 meters per day per person. The labor intensity is large and the work efficiency is low, so it is urgently required to realize the ditching mechanization. There are more types of ditching machines available, such as disc type, sprocket type, screw type and open plow, etc. However, more disc type ditches are still used.