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A Review on Emerging Pollutants in the Water Environment: Existences, Health Effects and Treatment Processes
Article

The Effect of Multi-Years Reclaimed Water Irrigation on Dryland Carbon Sequestration in the North China Plain

College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
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Author to whom correspondence should be addressed.
Academic Editors: Layla Ben Ayed, Eleni Golomazou, Panagiotis Karanis, Patrick Scheid, Ourania Tzoraki, Anna Lass and Muhammad Shahid Iqbal
Water 2021, 13(22), 3260; https://doi.org/10.3390/w13223260
Received: 13 October 2021 / Revised: 12 November 2021 / Accepted: 15 November 2021 / Published: 17 November 2021
(This article belongs to the Topic Emerging Solutions for Water, Sanitation and Hygiene)
Reclaimed water is an alternative water source which could alleviate the shortage of water resources in agricultural systems. Many researchers have studied the effect of reclaimed water on soil environment, crop yield, etc. However, carbon sequestration in reclaimed water irrigated agricultural systems is less studied. This study investigates methane uptake and photosynthesis in reclaimed water irrigation systems contributing to carbon sequestration estimation and analyzes the important factors impacting them. The results show that CH4 uptake is related to soil water-filled pore space (WFPS) with a quadratic and it has the highest uptake when WFPS is between 40 and 50%. Long-term reclaimed water irrigation could significantly decrease (p < 0.05) CH4 uptake and macroaggregate stability in the topsoil. However, reclaimed water had no significant impact on photosynthesis in comparison. The type of fertilizer is an important factor which impacts CH4 emission from soil; urea had a lower CH4 uptake and a higher CO2 emission than slow-released fertilizer. Overall, reclaimed water irrigation could effectively decrease soil carbon sequestration. A soil wetted proportion level of 40–50% was recommended in this study for favorable methane oxidation. Slow-released fertilizer in reclaimed water irrigated agriculture could better control soil carbon emission and soil carbon absorption. View Full-Text
Keywords: CH4 uptake; photosynthesis; carbon exchange; soil environment; water-filled pore space; types of fertilizer CH4 uptake; photosynthesis; carbon exchange; soil environment; water-filled pore space; types of fertilizer
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MDPI and ACS Style

Chi, Y.; Zheng, Q.; Yang, P.; Ren, S.; Ma, N. The Effect of Multi-Years Reclaimed Water Irrigation on Dryland Carbon Sequestration in the North China Plain. Water 2021, 13, 3260. https://doi.org/10.3390/w13223260

AMA Style

Chi Y, Zheng Q, Yang P, Ren S, Ma N. The Effect of Multi-Years Reclaimed Water Irrigation on Dryland Carbon Sequestration in the North China Plain. Water. 2021; 13(22):3260. https://doi.org/10.3390/w13223260

Chicago/Turabian Style

Chi, Yanbing, Qiang Zheng, Peiling Yang, Shumei Ren, and Ning Ma. 2021. "The Effect of Multi-Years Reclaimed Water Irrigation on Dryland Carbon Sequestration in the North China Plain" Water 13, no. 22: 3260. https://doi.org/10.3390/w13223260

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