干旱地区农业研究2018，Vol.36Issue(2)：93-100,8.DOI:10.7606/j.issn.1000-7601.2018.02.14
尿素对浑水水肥一体化滴灌滴头堵塞的影响
Influence of urea on emitter clogging with muddy water fertigation
摘要
Abstract
Three kinds of sediment concentrations (1 .0 ,1 .5 g·L-1 and 2 .0 g·L-1 ) and three concentrations of the fertilizers (1％ ,2％ and 3％ ) were set up to determine the effect of urea on the clogging of the drip in the process of fertigation ,and intermittent irrigation clogging test was conducted .The amount of discharge sediment and deposits sed-iment in the capillary was analyzed .The results showed that the application of urea to muddy water drip irrigation had the effect of relieving drip clogging .The effect of fertilization on the clogging of the emitter and the location of the main clog-ging was small .After apply urea to muddy water ,the number of completely clogged emitters had declined ,while the number of partially clogged drippers had increased .The sediment content in the drip flow increased with the increase of irrigation times ,then gradually slows down and tends to decrease .Application of urea to muddy water improved the drip sediment transport capacity , the greater the concentration of fertilization , the greater the capacity of the drip sediment transport ,the greater the discharge sediment rate .The application of urea in the water had the effect of slowing the clog-ging of the drip and prolonging the effective irrigation times of the dripper .When the sediment concentration was 2 .0 g·L-1 ,the number of effective irrigation with the urea concentration of 1％ ,2％ ,and 3％ was 11％ ,89％ and 100％higher than that of urea without adding urea .After application of urea to muddy water ,changing the nature of the electro-chemical properties and sediment particle surface of muddy water ,muddy water stable aggregates sediment flocculation difficult to form ,the ability to carry muddy sediment particles applied urea increased , thus play a role in slowing the emitter clogging .The current study can provide a way to alleviate the risk of drip clogging which using the Yellow River water and improve drip irrigation system efficiency .关键词
尿素/浑水/滴头堵塞/水肥一体化/滴头流量Key words
urea/muddy water/clogging of dripper/fertigation/dripper flow分类
农业科技引用本文复制引用
官雅辉,牛文全,刘璐,王亚琼..尿素对浑水水肥一体化滴灌滴头堵塞的影响[J].干旱地区农业研究,2018,36(2):93-100,8.基金项目
自然科学基金项目(51679205) （51679205）
国家重点研发计划资助项目(2016YFC0400202) （2016YFC0400202）
