Abstract：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.
[1]张育斌,魏正英,朱新国,等. 精量水肥灌溉系统控制策略及验证[J]. 排灌机械工程学报, 2017, 35(12): 1088-1095. ZHANG Yubin,WEI Zhengying,ZHU Xinguo, et al. Control strategy for precision water-fertilizer irrigation system and its verification[J]. Journal of drainage and irrigation machinery engineering, 2017, 35(12): 1088-1095.(in Chinese)[2]KENNEDY T L, SUDDICK E C, SIX J. Reduced nitrous oxide emissions and increased yields in California tomato cropping systems under drip irrigation and fertigation[J]. Agriculture ecosystems & environment, 2013, 170(8):16-27.[3]袁寿其, 李红, 王新坤. 中国节水灌溉装备发展现状、问题、趋势与建议[J]. 排灌机械工程学报, 2015, 33(1):78-92. YUAN Shouqi,LI Hong,WANG Xinkun. Status,problems,trends and suggestions for water-saving irrigation equipment in China [J].Journal of drainage and irrigation machinery engineering, 2015, 33(1):78-92.(in Chinese)[4]韩启彪, 冯绍元, 黄修桥,等. 我国节水灌溉施肥装置研究现状[J]. 节水灌溉, 2014(12):76-79. HAN Qibiao, FENG Shaoyuan, HUANG Xiuqiao, et al. Research on fertilizer injection units in saving-water irrigation in China [J]. Water saving irrigation, 2014(12):76-79.(in Chinese)[5]陈雪蛟, 王克俭, 韩宪忠,等. 水肥一体化自动控制系统设计[J]. 湖北农业科学, 2016(11):2902-2904. CHEN Xuejiao, WANG Kejian, HAN Xianzhong, et al. Designs on automatic control system of integration of water and fertilizer[J]. Hubei agricultural sciences, 2016(11):2902-2904.(in Chinese)[6]蔡长青, 侯首印, 张桢,等. 温室智能灌溉水肥一体化监控系统[J]. 江苏农业科学, 2017, 45(10):164-166. CAI Changqing,HOU Shouyin,ZHANG Zhen,et al. Integrated monitoring and control system of water and fertilizer for intelligent irrigation in Greenhouse[J]. Jiangsu agricultural sciences, 2017, 45(10):164-166.(in Chinese)[7]陆绍德, 黄所, 关经伦,等. HJYDS-1型移动式水肥药一体化施肥车研制与推广[J]. 现代农业装备, 2012(9):48-50. LU Shaode, HUANG Suo, GUAN Jinglun, et al. Deve-lopment and popularization of HJYDS-1 mobile integration of water, fertilizer and pesticides vehicle[J]. Mo-dern agricultural equipments, 2012(9):48-50.(in Chinese)[8]李建平,胡佳宁,王鹏飞,等. 一种施肥方法及水肥混合装置:CN104429270A [P]. 2015.[9]陈剑, 吕新. 滴灌棉田压差式施肥罐注肥均匀度研究与分析[J]. 节水灌溉, 2011(1):62-64. CHEN Jian, LYU Xin. Study on fertilization uniformity of pressure differential tank in drip irrigation cotton field[J]. Water saving irrigation, 2011(1):62-64.(in Chinese)[10]范军亮, 张富仓, 吴立峰,等. 滴灌压差施肥系统灌水与施肥均匀性综合评价[J]. 农业工程学报, 2016, 32(12):96-101. FAN Junliang, ZHANG Fucang, WU Lifeng, et al. Field evaluation of fertigation uniformity in drip irrigation system with pressure differential tank[J]. Transactions of the CSAE, 2016, 32(12):96-101.(in Chinese)[11]冯锦梅. 在线监测氨氮浓度的电导测量方法研究[J]. 环境监控与预警, 2014,6(1):34-38. FENG Jinmei. Study on the conductivity measurement method for ammonia on-line monitoring[J]. Environmental monitoring and forewarning, 2014,6(1):34-38.(in Chinese)[12]汤攀, 李红, 骆志文,等. 比例施肥泵驱动活塞受力分析及内部流动模拟与试验[J]. 农业工程学报, 2017, 33(23):93-100. TANG Pan, LI Hong, LUO Zhiwen, et al. Force analysis of drive piston and simulation and experiment of internal flow for proportional fertilizer pump[J].Transactions of the CSAE, 2017, 33(23):93-100.(in Chinese)[13]董文峰, 黄征青. 电导率法测定EDTA二钠盐水溶液的浓度[J]. 广州化工, 2017, 45(6):110-111. DONG Wenfeng,HUANG Zhengqing. Determination of concentration of EDTA-2Na aqueous solution by conductivity method[J]. Guangzhou chemical industry, 2017, 45(6):110-111.(in Chinese)[14]许正典,向清江,WAQAR A Q等. 摇臂喷头低压掺气情况下田间组合喷灌试验研究[J]. 排灌机械工程学报, 2018, 36(9): 840-844. XU Zhengdian, XIANG Qingjiang, WAQAR A Q, et al. Field combination experiment on impact sprinklers with aerating jet at low working pressure[J]. Journal of drainage and irrigation machinery engineering, 2018, 36(9): 840-844.(in Chinese)
