摘要
为研究再生水滴灌时水中加入微纳米气泡对灌水器堵塞的影响,选用4种不同类型的灌水器,设置再生水不加气、再生水加气2个处理,以平均流量比(Dra)表征灌水器堵塞的发展程度,以克里斯琴森均匀系数(Cu)、统计均匀系数(Us)评价随试验运行时间推移滴灌系统的均匀性变化.结果表明:微纳米加气对再生水滴灌系统灌水器堵塞具有显著影响,相较于不加气处理,加气处理下4种灌水器(E1,E2,E3,E4)的Dra值分别提高了16.2%,24.4%,18.2%和22.1%;加气处理下各灌水器的Cu和Us值大于不加气处理;加气对不同类型灌水器堵塞的控制效果也存在一定的差异,微纳米加气可降低灌水器的堵塞风险,延缓堵塞程度,延长灌水器的使用寿命,且对整个滴灌系统的均匀性有积极影响.试验结果可为再生水滴灌和加气滴灌技术的推广应用提供一定的技术支撑.
To study the effect of micro-nano bubbles to aeration in water on the clogging of emitters during drip irrigation with reclaimed water,four different types of irrigators were selected.Two treatment methods of reclaimed water with non-aeration and reclaimed water with aeration were set in expe-riment.The average flow rate discharge ratio variation(Dra)was used to express the development degree of emitter clogging,the Christensen uniformity coefficient(Cu)and statistical uniformity coefficient(Us)were used to evaluate the uniformity of drip irrigation system.The results show that micro-nano aeration has a very significant impact on the clogging of emitters in the reclaimed water drip irrigation system.Compared with the non-aeration treatment,the Dra values of the four emitters(E1,E2,E3,E4)are increased by 16.2%,24.4%,18.2%and 22.1%,respectively.The Cu and Us values of all emitters after aeration treatment are also much larger than those of emitters without aeration treatment.There are also certain differences in the control effect of aeration on the clogging of different emitters.Therefore,micro-nano aeration can reduce the risk of clogging emitters,delay the clogging degree,extend the service life of emitters and have a positive impact on the uniformity of the whole drip irrigation system.The experiment results can provide some technical support for the promotion and application of reclaimed water drip irrigation and aerated drip irrigation technology.
作者
董聪慧
李浩
李瑞
孙浩
韩启彪
李辉
DONG Conghui;LI Hao;LI Rui;SUN Hao;HAN Qibiao;LI Hui(Institute of Farmland Irrigation,Chinese Academy of Agricultural Sciences/Key Laboratory of Water-saving Agriculture of Henan Province/Key Laboratory of Water-saving Irrigation Engineering,Ministry of Agriculture and Rural Affairs,Xinxiang,Henan 453002,China;Graduate School of Chinese Academy of Agricultural Sciences,Beijing 100081,China)
出处
《排灌机械工程学报》
CSCD
北大核心
2024年第1期86-94,共9页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(52009137)
中国农业科学院农业科技创新工程项目(ASTIP202102)
河南省科技攻关项目(202102110279,202102110277)
中国农业科学院基本科研业务费专项院级统筹项目(Y2021YJ07,Y2022XK12)。
关键词
灌水器
滴灌堵塞
微纳米加气
再生水
emitter
drip irrigation clogging
micro-nano aeration
reclaimed water
