Comprehensive analysis of affecting factors on sprinkler irrigation uniformity based on orthogonal experiment
TANG Yuting1, YANG Shengxiang1, YANG Jinping1, GUO Yijian2, YUAN Shouqi2*
1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：In order to optimize the irrigation and fertilization conditions of the light and small translational sprinkler irrigation units, an orthogonal test was designed to investigate the effect of three factors fertilizer concentration, nozzle vehicle travel speed and sprinkler height on the performance of water-fertilizer integration in the light and small translation sprinkler irrigation units at a sprinkler operating pressure of 0.25 MPa and a proportional fertilizer pump inlet and outlet pressure of 0.22 MPa. The test results were analyzed by extreme difference and variance to obtain the optimal horizontal combination of the three factors and compare the size of three influencing factors. The results showed that: (1) The main factors affecting the uniformity of fertilizer concentration(CU1)and the uniformity of fertilizer concentration distribution(DU1)are the height of sprinkler irrigation, while the fertilization concentration and walking speed have little impact on it, and the significance is higher than 0.05. (2) The main factor affecting CU2 is the travel speed, followed by the sprinkler height, and the fertilizer concentration has no significance on it. (3) The influence factors of fertilizer concentration, sprinkler height and travel speed on DU2 are all greater than 0.05. (4) The optimal fertilizer technology level combination is A1B2C2, where the fertilizer concentration is 0.4 g/L, the spray irrigation height is 1.2 m and the travel speed is 30 m/h.
