Compounding with humic acid improved nutrient uniformity in drip fertigation system using brackish water: The perspective of emitter clogging

Wang, Yayu; Muhammad, Tahir; Liu, Zeyuan; Ma, Changjian; Wang, Zhenhua; He, Xiaoyun; Li, Yunkai

doi:10.1016/j.agwat.2022.107670

Cited by 4 publications

(1 citation statement)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phosphorus fertigation with acidic fertilizers such as monoammonium phosphate and urea phosphate has been demonstrated to reduce emitter clogging (Wang, Yang, & Li, 2020). Similarly, humic acid (HA) nitrogen fertilizer can also indirectly affect clogging precipitate formation by reducing the pH of irrigation water, which alleviates the clogging of the irrigator (Liu et al, 2023; Wang et al, 2022). Additionally, HA released from HA nitrogen fertilizer can improve saline–alkali soil properties and reduce soil alkalinity (Peuravuori et al, 2006); therefore, HA has broad application prospects in saline water drip irrigation systems.…”

Section: Introductionmentioning

confidence: 99%

Effects of saline water with different concentrations of calcium and magnesium ions on emitter clogging in drip irrigation integrated water–fertilizer system

Zhou,

Wei,

Yang

et al. 2023

Irrigation and Drainage

Self Cite

View full text Add to dashboard Cite

The application of saline water in drip irrigation is severely constrained due to its high salt content, which causes precipitation and emitter clogging. Therefore, the effects of calcium and magnesium ions at 100, 150 and 200 mg/L in saline water coupled with humic acid nitrogen fertilizer on emitter clogging were studied. Compared with ground saline water, all treatments significantly increased the emitter clogging risk. In the calcium and magnesium ion treatment groups, clogging fouling increased by 23.94–58.35 and 14.55–51.21 mg/cm2, the discharge variation ratio (Dra) decreased by 22%–59% and 14%–49%, and the Christiansen coefficient of uniformity (CU) decreased by 29%–79% and 15%–74%, respectively. Higher ion concentrations caused more clogging. Saline water with a high calcium content caused more clogging. Under similar concentration conditions, the Dra and CU in high magnesium saline water were 9%–32% and 8%–51% higher, respectively. In addition, the increase in magnesium ion concentration changed the crystal form of carbonate, slowed the formation rate of precipitated dirt and significantly reduced the carbonate content by 19%–40%. Our results provide support for the popularization of saline water drip irrigation systems.

show abstract