城西湖农场地势低洼、土质粘重,遇到阴雨,田面积水排除了,土壤仍处于饱和状态,影响了农作物的生长,并延悮农时。为了解决田间地下排水问题,在部队党委的领导下,于一九七三年我场试制了悬挂式打洞机,进行了作业试验,初见成效。一九七四年,对该机进行了反复试验改进,在南京土壤研究所协助下,对犁头部分进行了改革,制成了东方红-75液压悬挂打洞机。实践证明,机具结构坚固,重量轻,使用可靠。它有三个优点深受广大指战员欢迎。(1)用该机打洞后,田间排水状况明显改善,土壤湿度得到控制;(2)减少了田表面的明沟,有利于机器作业,同时雨后田土可均匀快干,使机器能提早数日下地作业;(3)作业简便易行,一次打成可用数年。目前,暗洞排水已在我场推广使用。 Chengxihu farm low-lying, soil sticky weight, encountered rainy days, surface area water is excluded, the soil is still in saturation, affecting the growth of crops, and delay farming time. In order to solve the problem of underground drainage in the field, under the leadership of the military party committees, I conducted trial production of a hanging-type excavating machine in 1973 and conducted initial homework tests. In 1974, the aircraft was repeatedly tested and improved. With the help of Nanjing Soil Research Institute, the plowshare part was reformed to produce the Dongfanghong-75 hydraulic suspension drilling machine. Practice has proved that a solid structure, light weight, reliable use. It has three advantages welcomed by the majority of commanders and crew. (1) After the hole is drilled with the machine, the drainage condition in the field is obviously improved and the soil humidity is controlled; (2) The open ditch on the surface of the field is reduced, which is good for the operation of the machine; meanwhile, the soil can be uniformly and quickly dried after rain, Work day by day; (3) homework is simple and easy, once labeled as available for several years. At present, dark hole drainage has been promoted in my field.