前言近来普遍采用了轻便挖坑机,这是实现机械化造林的第一步。使用挖坑机与手工作业相比较,其优点是:坑穴规格一致,碎土均匀,切植(切断树根或草)能力强,植树成活率高;其缺点是:机重,作业中反扭矩大,操作者劳动强度大。人们正期待着由拖拉机带动的挖坑机出现。 Foreword The use of lightweight digging machines has recently become common practice. This is the first step towards mechanized afforestation. The advantages of using digging machines compared with manual work are: uniform pit specifications, uniform smashed soil, strong ability to cut (cut roots or grass), and high survival rate of tree planting; its disadvantages are: Torque is large, and the operator is labor-intensive. People are looking forward to the emergence of tractor-driven digging machines.