Fertilizer applicator for crop seedling

A fertilizer applicator for crop seedling comprises the following components: a frame, a lifting frame, a driving frame landing frame, a transmission system, a quantitative fertilizer applying device, a fixed-point fertilizer applicator assembly, etc. The quantitative fertilizer applying device is designed to an amount-adjustable movable square quantitative box. The fertilizer applicator assembly is a crank slider mechanism. A fertilizer applying crank drives a hole shoving pipe to move vertically and insert into soil layer. Simultaneously a door opening device is arranged for opening a door in time for applying the fertilizer to a preset depth of the soil layer. A ratchet wheel mechanism is adopted for connection between a driving wheel and a driving wheel shaft. High flexibility in reversal and turning is obtained. Sprocket chain transmission is adopted for the transmission system. The fertilizer applying distance can be adjusted through adjusting the numbers of teeth of the sprocket wheels. A square U-shap