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| Experiment of Injection Control System of Water and Fertilizer Uniformity Drip Irrigation for Greenhouse Vegetable |
| WANG Xiu，MA Wei，ZHANG Rui，ZOU Wei，ZHOU Zhou |
| Beijing Research Center for Intelligent Agriculture Equipment，Beijing 100097，China |
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Abstract Sampling single drip irrigation tube at different times and using fertilizer injection drip irrigation in greenhouse，we studied the spatial and temporal variation of irrigation flow and fertilizer concentration in the irrigation process by Rhodamine WT（0.1 g L-1）solution as fluorescent tracer．According to the changes of irrigation flow and fertilize concentration and the hydraulic characteristics in different conditions of fertilization injection，the affection to water and fertilizer uniformity were studied by the fertilization injection drip irrigation system，and liquid fertilizer distribution in the pipeline system were analyzed in the fertilization injection process finally．The results showed that the drip irrigation and injection fertilizer control system can realize the accurate control of fertilizer rate by controlling water suppy quantity and injection rate of mixed solution.
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Received: 03 August 2011
Published: 11 October 2011
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