2026-04-17T14:00:19Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/234402024-06-18T12:08:08Zcom_2072_452955com_2072_2054col_2072_453062

00925njm 22002777a 4500 dc Wang, Yayu author Xiao, Yang author Puig Bargués, Jaume author Zhou, Bo author Liu, Zeyuan author Muhammad, Tahir author Liang, Hongbang author Maitusong, Memetmin author Wang, Zhenhua author Li, Yunkai author 2023-11-01 Utilizing brackish water with drip irrigation technology, due to its precise water control alleviates the secondary soil salinization, and improves crop yield and quality, which offers sustainable agricultural development opportunities in saline areas. However, the complex characteristics of brackish water increase the risk of drip irrigation emitter clogging, which inhibit its promotion and adoption. It is necessary to find out the dominant water quality ions that lead to emitter clogging under multiple ion interactions when using brackish water under multiple ion coexistence conditions. Thus, the in-situ pilot research was conducted to study the emitter clogging mechanism using brackish water collected from 16 different salt-alkaline regions. A comprehensive evaluation with the consideration of 11 water quality ions on emitter clogging were conducted. Results showed that the degree of emitter clogging gradually increased in the first 40 days of irrigation, hereafter started an accelerated reduction until the days 64 of brackish water application. Spearman correlation and structural equation modelling were used to identify the main factors contribute to emitter clogging. And results indicated that calcium fouling (CF) and silica fouling (SF) were the major fouling minerals in the emitter flow channels. Ca2+, CO32-+HCO3-, pH, total hardness (TH), and zeta potential (ZP) were the key water characteristics leading to emitter clogging. These factors directly affected CF and SF, while also affecting the Mg2+, Mn2+, Cu2+, and other water quality factors which indirectly enhanced the CF and SF. Thereafter a few water quality control strategies were proposed based on emitter clogging and soil salinization mitigation. This study identified the key water quality ions that induce drip irrigation emitter clogging when using brackish water, provided solid support for solving the clogging issue, and promoted the high-efficient utilization of brackish water in saline areas This work was supported by the National Natural Science Foundation of China (51790531), Bingtuan Science and Technology Program (2022DB024), Special Research Project of Kashgar River in Xinjiang (XJKGKY001). http://hdl.handle.net/10256/23440 Regatge per degoteig Agricultura sostenible Salinitat Trickle irrigation Sustainable agriculture Salinity Assessment of water quality ions in brackish water on drip irrigation system performance applied in saline areas