The fertilization performance of a dissolved and mixed water-fertilizer integrated device was characterized and the uniformity of solution concentration at the outlet of the device was used as the main parameter measuring the performance. The effects of filter parameters, inlet flow rate and fertilizer feeder on the performance were studied by using variable control method. Experimental results showed that the uniform coefficient of solution concentration at the outlet of the device for 60 mesh filter was 6.1% better than that for 40 mesh filter. For the filter with 250 mm diameter, the uniform coefficient was 4.3% higher than that for the filter with 150 mm diameter. Under the condition of 1.5 m3/h flow rate, the uniformity coefficient of solution concentration at the outlet was 12.6% and 17.3% higher in comparison with the flow rates of 2.5 m3/h and 2.0 m3/h. When fertilizer feeder was used, the uniformity coefficient was 9.9% higher than that without the feeder. Therefore, filter parameters and flow rate exhibited obviously influences on the fertilization performance of the device. The more the number of filter meshes and the larger the filter diameter as well as the lower the flow rate, the higher the uniformity coefficient and the better the fertilization performance.
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