Filter fertilizer tankThe precautions for use are as follows:

① When the tank is smallFertilizer jarWhen fertilizing the tank (less than 100L), try to dissolve the solid fertilizer as much as possible and pour it into the tank, otherwise it may clog the tank, especially when the pressure is low.

② Some fertilizers may contain some impurities. Dissolve and filter them before pouring them into the fertilizer can, with a filter screen of 100-200 mesh. If solid fertilizer is added directly, a 1/2 "mesh filter must be installed at the outlet of the fertilizer tank. Alternatively, the fertilizer tank can be installed before the filter in the main pipeline.

③ After each application of fertilizer, the pipeline should be rinsed with irrigation water to remove any remaining fertilizer liquid from the pipeline. General drip irrigation system takes 20-30 minutes, micro sprinkler irrigation takes 10-15 minutes, and there are no requirements for sprinkler irrigation system. If some drip irrigation systems have multiple irrigation areas and fertilization requires completion in the shortest possible time, it is possible to consider measuring the change in conductivity at the drip head to determine the cleaning time. In general, the larger the irrigation area at the head, the longer the water pipeline, and the longer the flushing time. Rinsing is a necessary process. Due to the residual fertilizer remaining in the pipeline and drip head, it is highly susceptible to the growth of lower plants such as algae and moss, which can clog the drip head; When the hardness of irrigation water is high, residual fertilizer liquid forms sediment at the drip head, causing blockage. Timely flushing can basically prevent blockage from occurring. According to the author's investigation, most of the clogging of drip heads after irrigation and fertilization is related to the lack of timely flushing after fertilization.

④ The pressure difference required for the fertilizer tank is obtained by the regulating valve between the inlet and outlet. Because irrigation time is usually longer than fertilization time, the shut-off valve should be fully opened when not fertilizing. Regularly adjusting the valve may result in inconsistent pressure differences during fertilization (especially when the pressure gauge range is too large, making inaccurate judgments), thereby leading to inaccurate timing of fertilization. To achieve a constant pressure difference, a shut-off valve can be used instead of a flow meter (water meter). When water flows through the water meter, it creates a small pressure difference that can be used for fertilizer tanks. When not fertilizing, close the thin tubes at both ends of the fertilization tank, and the pressure difference on the main pipe still exists. In this situation, regardless of whether fertilization is applied or not, the pressure on the supervisor is balanced.