Phosphorus spatial distribution and pollution risk assessment in agricultural soil around the Danjiangkou reservoir, China

Li, Zhiguo; Zhang, Runhua; LIU, Chuang; Zhang, Runqin; Chen, Fang; Liu, Yi

doi:10.1016/j.scitotenv.2019.134417

Cited by 48 publications

(17 citation statements)

References 37 publications

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“…The pathways of P loss from paddy fields include discharge to the water via leaching or runoff (Zhang et al, 2017; Zhu et al, 2022), leading to water pollution (Li et al, 2020; Ortiz‐Reyes & Anex, 2018; Weihrauch & Weber, 2020). Previous studies have shown that rainfall intensity‐induced discharge accounts for 27% to 63% of the total runoff losses of P across China (Fu et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…In the present study, application of conventional P fertilizer resulted in huge P losses via runoff and leaching and continuously reduced crop yield. The P loss from paddy fields and resulting non‐point pollution in waterbodies have been widely reported (Hua et al, 2017; Li et al, 2020; Ortiz‐Reyes & Anex, 2018; Weihrauch & Weber, 2020). The decreased P uptake by plants may undermine yield production because P is a structural element for many macromolecules in plants and participates in energy transfer and photosynthesis (Marschner, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…When applied P exceeds the nutrient requirements of plants, the surplus P is adsorbed by the soil minerals, such as iron and aluminum compounds (Chu, Lyu, et al, 2021). As a consequence, the accumulated P that is not incorporated into the plants is washed away and leached into bodies of water via soil erosion and discharge, which causes further environmental concerns, such as eutrophication (Li et al, 2020; Ortiz‐Reyes & Anex, 2018; Weihrauch & Weber, 2020). In China, 60% of the annual gross P loading to bodies of water is estimated to derive from agricultural activities (Alewell et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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The current fertilizer regimes cause phosphorus deficit in paddy soils and decreased rice phosphorus uptake: a study in Shanghai, China

Chu

Xing

et al. 2023

Land Degrad Dev

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Excessive phosphorus (P) fertilization in intensive rice-cultivation areas in China has caused serious environmental problems. However, relatively little research has been done on investigating the soil P balance in rice production systems based on different fertilizer regimes. Our study investigated the dynamic variation of soil P balance and rice P use efficiency and productivity from 2014 to 2018 in the paddy fields under synthetic fertilizer (CF) and manure application (OF) regimes based on the practices of local farmers. Flooding water on the paddy fields tends to cause P loss via runoff and leaching. A lysimeter system was used to monitor P loss from paddy fields, which overcame the limitations of real-time monitoring discharge volume and sample-collection. The results with relatively higher rainfall intensity in 2014 and 2015, in total, 4.69 kg P ha À1 under CF and 8.39 kg P ha À1 under OF were lost via runoff in 2014, with 13.6 kg P ha À1 under CF and 17.8 kg P ha À1 under OF in 2015, whereas from 2015 to 2018, no more than 5 kg P ha À1 was lost in CF or OF via runoff. Leaching showed a similar, varying trend for both CF and OF. Furthermore, during the 5 years, a continuous soil P deficit was observed, except in 2017 and 2018 for CF and 2018 for OF. The net P retention ranged from À15.31 to 6.2 kg ha À1 for CF and from À23.65 to 2.64 kg ha À1 for OF. The continuous P deficit in paddy soils might have reduced soil P storage. These huge P losses undermined rice yield production. In parallel, after 2014, the grain yield decreased from 10,885.7 in 2014 to 6266.7 kg ha À1 in 2017 under CF and from 10,607.6 to 6649.6 kg ha À1 under OF. Overall, these results reveal a risk of declining P storage in paddy soils and a potential menace on food safety under the current fertilizer management, suggesting that novel fertilizer strategies need to be developed for reserving P storage in paddy fields.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The current fertilizer regimes cause phosphorus deficit in paddy soils and decreased rice phosphorus uptake: a study in Shanghai, China

Chu

Xing

et al. 2023

Land Degrad Dev

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“…A comprehensive understanding and proper evaluation of the risks caused by the main risk sources in the river basin to the ecological environment and human society could reduce their vulnerability in critical situations and provide a theoretical basis for the future risk management and governance [10]. Soil nitrogen and phosphorus loss was an important source and its loss risk assessment was the keynote for researchers [11][12][13] assessed the phosphorus loss risk as characteristic pollutants of agricultural soil in the Danjiangkou watershed in China. Universal Soil Loss Equation (USLE) was the basis and the most widely used prediction method of nitrogen and phosphorus loss in the world, because its loss factors were relatively easy to determine based on abundant experimental observation data [14][15][16] evaluated the risk of soil nitrogen and phosphorus loss by this method around the Yishu River Basin in China, and found that the risk in industrial developed areas was slightly higher than that in agricultural developed areas.…”

Section: Introductionmentioning

confidence: 99%

Distribution Characteristics and Risk Assessment of Agricultural Land Use Non-Point Source Pollution in Typical Biofuel Ethanol Planting Areas

Cui

Liu

Wang

et al. 2022

IJERPH

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Speeding up the promotion and application of bio-fuel ethanol was a national strategy in China, which in turn affected changes in the raw material planting structure. This study analyzed the distribution of nitrogen and phosphorus forms in water bodies and the soil of the typical maize and cassava fuel ethanol raw material planting areas. The results revealed that the maize planting area faced more serious TN and TP pollution. The river pollution was greatly affected by TN, TP, Ex-P and Fe/Al-P in soil, while soil TN and NO3--N were the main factors influencing its counterpart. Furthermore, the risk assessment of soil nitrogen and phosphorus loss was carried out based on planting structures of crops. We investigated whether the water quality indexes or soil nitrogen and phosphorus loss risk assessment results showed that the Yujiang River stayed significantly less polluted. It was proven that the cassava planting area was more suitable for vigorously developing fuel ethanol. As for the high-risk areas, ecological agriculture promoting and fertilizer controlling measures were suggested. Under the change of the fuel-ethanol policy, this study could provide scientific support for the assessment of the impact of the Chinese national fuel ethanol policy on the water environment of the raw material planting area.

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“…There are various methods to study the response of streamflow, sediment, and non-point sources pollution on climate and land-use change, such as statistical technique (Li et al, 2020;Li et al, 2020b), non-point source pollution (GBNP) model (Tang et al, 2011), and hydrological model (SLURP hydrological model, a coupled network-scale hydrological and biogeochemical model, SWAT) (Wu et al, 2012). Among these, coupling the climate model and the soil and water assessment tool (SWAT) is widely applied to investigate the hydrological, sediment, and nonpoint source pollution resulting from climate change and land-use change (CARD: SWAT literature database for peer-reviewed journal articles, 2021).…”

Section: Introductionmentioning

confidence: 99%

Exploring and Predicting the Individual, Combined, and Synergistic Impact of Land-Use Change and Climate Change on Streamflow, Sediment, and Total Phosphorus Loads

Xie

Chen

Yun-Feng

et al. 2021

Front. Environ. Sci.

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The present study predicts and assesses the individual, combined, and synergistic effect of land-use change and climate change on streamflow, sediment, and total phosphorus (TP) loads under the present and future scenarios by using the Soil and Water Assessment Tool (SWAT). To predict the impacts of climate and land-use change on streamflow, sediment, and TP loads, there are 46 scenarios composed of historical climate, baseline period climate, eight climate models of Coupled Model Intercomparison Project phase 5 (CMIP5) of two representative emission pathways (RCP4.5 and RCP8.5), after downscaled and bias-corrected, two observed land-use maps (LULC 1995, LULC 2015) and the projected two future land-use maps (LU2055 and LU 2075) with the help of CA-Markov model to be fed into SWAT. The central tendency of streamflow, sediment, and TP loads under future scenarios is represented using the annual average. The intra-/inter-annual variation of streamflow, sediment, and TP loads simulated by SWAT is also analyzed using the coefficient of variation. The results show that future land-use change has a negligible impact on annual streamflow, sediment, TP loads, and intra-annual and inter-annual variation. Climate change is likely to amplify the annual streamflow and sediment and reduce the annual TP loads, which is also expected to reduce its inter-/intra-annual variation of TP loads compared with the baseline period (2000–2019). The combined impact of land-use and climate change on streamflow, sediment, and TP loads is greater than the sum of individual impacts for climate change and land-use change, especially for TP loads. Moreover, the synergistic impact caused by the interaction of climate and land use varies with variables and is more significant for TP loads. Thus, it is necessary to consider the combined climate and land-use change scenarios in future climate change studies due to the non-negligible synergistic impact, especially for TP loads. This research rare integrates the individual/combined/synergistic impact of land-use and climate change on streamflow, sediment, and TP loads and will help to understand the interaction between climate and land-use and take effective climate change mitigation policy and land-use management policy to mitigate the non-point source pollution in the future.

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Phosphorus spatial distribution and pollution risk assessment in agricultural soil around the Danjiangkou reservoir, China

Cited by 48 publications

References 37 publications

The current fertilizer regimes cause phosphorus deficit in paddy soils and decreased rice phosphorus uptake: a study in Shanghai, China

The current fertilizer regimes cause phosphorus deficit in paddy soils and decreased rice phosphorus uptake: a study in Shanghai, China

Distribution Characteristics and Risk Assessment of Agricultural Land Use Non-Point Source Pollution in Typical Biofuel Ethanol Planting Areas

Exploring and Predicting the Individual, Combined, and Synergistic Impact of Land-Use Change and Climate Change on Streamflow, Sediment, and Total Phosphorus Loads

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