第三讲施肥机械种类和适用范围推广机械深施化肥技术,首先要选择适用的化肥深施作业机具。目前我国已研制出百余种化肥深施机具,就适用化肥种类划分,有两种机型,一种适应排施尿素、磷二铵等颗粒状化肥,排肥器形式有外槽轮、双向搅龙、水平星轮和型孔轮式;另一种适应排施颗粒状化肥,排肥器形式有摆斗式、刮板式、齿杆式和搅刀——拨 Lecture 3: Types and Scope of Application of Fertilizer Machinery To promote the deep application of chemical fertilizer technology, we must first select the applicable fertilizer application facilities. At present, China has developed more than 100 kinds of fertilizer deep facilities, the types of fertilizer available for classification, there are two models, one adapted to discharge urea, phosphorus and other granular fertilizer, fertilizer in the form of outer sheave wheels, two-way Auger, horizontal star wheels and perforated wheels; another adapted to the arrangement of granular fertilizer, the form of fertilizer-hopper, scraper, rack-and-knife - dial