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3.压差式施肥罐。如图4所示,将肥料箱并联安装在输水管道上,在两连接管之间装一闸阀,将闸阀关小一定程度,则在两连接口处形成一定的压差,在这个压差的作用下,箱内肥液流动,不断进入滴灌系统中。它的缺点是肥箱必须密封,且不能连续加肥。4.注射泵。如图5所示,注射泵又称压入式施
3 pressure-type fertilizer tank. As shown in Fig. 4, the fertilizer tank is installed in parallel on the water pipeline, a gate valve is installed between the two connecting pipes, the gate valve is closed to a certain extent, and a certain pressure difference is formed between the two connecting ports. Under this pressure difference Under the action of the liquid fertilizer inside the box, continue to enter the drip irrigation system. Its disadvantage is that the fat box must be sealed and can not be continuously fed. 4 injection pump. As shown in Figure 5, syringe pump, also known as push-type application