Since 2015 the SinoGerman research project SIGN supports water quality improvement in the Taihu region, China

Schmidt, Kathrin R.; Beek, Tim aus der; Dai, Xiaohu; Dong, Bingzhi; Dopp, Elke; Eichinger, Florian; Hammers‐Wirtz, Monika; Haußmann, Regina; Holbach, Andreas; Hollert, Henner; Illgen, Marc; Xia, Junqiang; Koehler, Jan; Koester, Stephan; Korth, Andreas; Kueppers, Stephan; Li, Aili; Lohmann, Matthias; Moldaenke, Christian; Norra, Stefan; Qin, Boqiang; Qin, Yanwen; Reese, Moritz; Riehle, Edmund; Santiago-Schuebel, Beatrix; Schaefer, Charlotte; Simon, André Louis; Song, Yonghui; Staaks, Christian; Steinhardt, Joerg; Subklew, G.; Tao, Tao; Wu, Tingfeng; Yin, Daqiang; Zhao, Fangfang; Zheng, Binghui; Zhou, Meiyue; Zou, Hua; Zuo, Jiane; Tiehm, Andreas

doi:10.1186/s12302-016-0092-7

Cited by 18 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The loss of phosphorus (P) from agricultural soils has been identified as one of the main causes of eutrophication of lakes in the lower reaches of the Yangtze River in southern China [1]. Statistics have shown that major lakes and reservoirs in this area were eutrophic and mesotrophic [2][3][4], and the Yangtze River Delta region accounted for 17% of the 10 Tg annual increase in soil P around the world [2]. In soil, colloidal P (P coll ) is the P fraction bound to colloids [5].…”

Section: Introductionmentioning

confidence: 99%

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Jin

et al. 2020

Environ Sci Eur

View full text Add to dashboard Cite

Background: Colloid-facilitated phosphorus (P) transport is recognized as an important pathway for the loss of soil P in agricultural systems; however, information regarding soil aggregate-associated colloidal P (P coll ) is lacking. To elucidate the effects of aggregate size on the potential loss of P coll in agricultural systems, soils (0-20 cm depth) from six land-use types were sampled in the Zhejiang Province in the Yangtze River Delta region, China. The aggregate size fractions (2-8 mm, 0.26-2 mm, 0.053-0.26 mm and < 0.053 mm) were separated using the wet sieving method. Colloidal P and other soil parameters in aggregates were analyzed. Results:Our study demonstrated that 0.26-2 mm small macroaggregates had the highest total P (TP) content. In acidic soils, the highest P coll content was observed in the 0.26-to 2-mm-sized aggregates, while the lowest was reported in the < 0.053 mm (silt + clay)-sized particles, the opposite of that revealed in alkaline and neutral soils. Paddy soils contained less P coll than other land-use types. The proportion of P coll in total dissolved P (TDP) was dominated by < 0.053 mm (silt + clay)-sized particles. Aggregate size strongly influenced the loss potential of P coll in paddy soils, where P coll contributed up to 83% TDP in the silt + clay-sized particles. The P coll content was positively correlated with TP, Al, Fe, and the mean weight diameter. Aggregate-associated total carbon (TC), total nitrogen (TN), C/P, and C/N had significant negative effects on the contribution of P coll to potential soil P loss. The P coll content of the aggregates was controlled by the aggregate-associated TP and Al content, as well as the soil pH value. The potential loss of P coll from aggregates was controlled by its organic matter content. Conclusion:We concluded that management practices that increase soil aggregate stability or its organic carbon content will limit P coll loss in agricultural systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Jin

et al. 2020

Environ Sci Eur

View full text Add to dashboard Cite

show abstract

“…Hydrological problems usually involve huge amounts of data, complicated or temporarily unknown mechanisms, and nonlinear spatial and temporal distribution (Schmidt et al 2016). Artificial neural networks (ANNs) can be used to model and solve problems when constructing hydrological models.…”

Section: Introductionmentioning

confidence: 99%

Characterizing dissolved organic matter in Taihu Lake with PARAFAC and SOM method

Zhang

Tian

Dong

2022

Water Science and Technology

View full text Add to dashboard Cite

The three-dimensional fluorescence spectrum has a significant amount of information than the single-stage scanning fluorescence spectrum. At the same time, the parallel factor (PARAFAC) analysis and neural network method can help explore the fluorescence characteristics further, thus could be used to analyse multiple sets of three-dimensional matrix data. In this study, the PARAFAC analysis and the self-organizing mapping (SOM) neural network method are firstly introduced comprehensively. They are then adopted to extract information of the three-dimensional fluorescence spectrum data set for fluorescence characteristics analysis of dissolved organic matter (DOM) in Taihu Lake water. Forty water samples with DOM species were taken from different seasons with the fluorescence information obtained through the three-dimensional fluorescence spectrum analysis, PARAFAC analysis and SOM analysis. The PARAFAC analysis results indicated that the main fluorescence components of dissolved organic matter in Taihu Lake water were aromatic proteins, fulvic acids, and dissolved microorganisms. While the SOM analysis results exhibited that the fluorescence characteristics of the dissolved organics in Taihu Lake varied seasonally. Therefore, the combined method of the three-dimensional fluorescence spectrum analysis, PARAFAC and SOM analysis can provide important information for the characterization of the fluorescence properties of dissolved organic matter in surface water bodies.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Jin

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: Colloid-facilitated phosphorus (P) transport is recognized as an important pathway for the loss of soil P in agricultural systems; however, information regarding soil aggregate-associated colloidal P (Pcoll) is lacking. To elucidate the effects of aggregate size on the potential loss of Pcoll in agricultural systems, soils (0–20 cm depth) from six land-use types were sampled in the Zhejiang province in the Yangtze River Delta region, China. The aggregate size fractions (2–8 mm, 0.26–2 mm, 0.053–0.26 mm and <0.053 mm) were separated using the wet sieving method. Colloidal P and other soil parameters in aggregates were analyzed. Results: Our study demonstrated that 0.26–2 mm small macroaggregates had the highest total P (TP) content. In acidic soils, the highest Pcoll content was observed in the 0.26–2 mm sized aggregate, while the lowest was reported in the <0.053 mm (silt+clay)-sized particles, the opposite of that revealed in alkaline and neutral soils. Paddy soils contained less Pcoll than other land-use types. The proportion of Pcoll in total dissolved P (TDP) was dominated by <0.053 mm (silt+clay)-sized particles. Aggregate size strongly influenced the loss potential of Pcoll in paddy soils, where Pcoll contributed up to 83% TDP in the silt+clay sized particles. The Pcoll content was positively correlated with TP, Al, Fe, and the mean weight diameter. Aggregate-associated total carbon (TC), total nitrogen (TN), C/P, and C/N had significant negative effects on the contribution of Pcoll to potential soil P loss. The Pcoll content of the aggregates was controlled by the aggregate-associated TP and Al content, as well as the soil pH value. The potential loss of Pcoll from aggregates was controlled by its organic matter content. Conclusion: We concluded that management practices that increase soil aggregate stability or its organic carbon content will limit Pcoll loss in agricultural systems.

show abstract

Since 2015 the SinoGerman research project SIGN supports water quality improvement in the Taihu region, China

Cited by 18 publications

References 28 publications

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Characterizing dissolved organic matter in Taihu Lake with PARAFAC and SOM method

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Contact Info

Product

Resources

About