Compositional and chemical characteristics of dissolved organic matter in various types of cropped and natural Chinese soils

Li, Songyan; Li, Meng; Wang, Guoxi; Sun, Xiaolei; Xi, Beidou; Hu, Zhengyi

doi:10.1186/s40538-019-0158-z

Cited by 26 publications

(10 citation statements)

References 53 publications

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“…Similarly, strong regional variation in the effects of straw application on SOC stocks, and a lack of increase in SOC stocks in regions with low SOC densities have been reported [ 52 ]. The decrease in soil TN content with straw incorporation could be attributed to straw-derived increase in N use efficiency and an increase in N loss under high N input [ 53 , 54 ].…”

Section: Discussionmentioning

confidence: 99%

Straw Incorporation with Nitrogen Amendment Shapes Bacterial Community Structure in an Iron-Rich Paddy Soil by Altering Nitrogen Reserves

Wang

Lin

et al. 2021

Microorganisms

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Incorporation of crop straw into the soil along with inorganic fertilization is a widespread agricultural practice and is essential in nutrient-scarce soils, such as iron-rich (ferruginous) paddy soils. The responses of soil bacterial communities to straw incorporation under different nitrogen inputs in iron-rich soils remain unclear. Therefore, 6000 kg ha−1 dry wheat (Triticum aestivum L. cv. Zhengmai 12) straw was applied to a rice paddy with and without nitrogen amendment (0, 80, 300, and 450 kg ha−1 N as urea), to investigate its effects on soil fertility and bacterial community structure. Organic matter, total nitrogen, and water contents tended to decrease in straw-incorporated soils with different nitrogen inputs. Proteobacteria was the dominant bacterial phylum across all treatments (26.3–32.5% of total sequences), followed by Chloroflexi, Acidobacteria, and Nitrospirae. Up to 18.0% of all the taxa in the bacterial communities were associated with iron cycling. Straw incorporation with nitrogen amendment increased the relative abundance of iron oxidizers, Gallionellaceae, while decreasing the relative abundance of iron reducers, Geobacteraceae. Bacterial community composition shifted in different treatments, with total nitrogen, water, and Fe(III) contents being the key drivers. Straw incorporation supplemented by 300 kg ha−1 N increased bacterial richness and enhanced all the predicted bacterial functions, so that it is recommended as the optimal nitrogen dosage in practice.

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Section: Discussionmentioning

confidence: 99%

Straw Incorporation with Nitrogen Amendment Shapes Bacterial Community Structure in an Iron-Rich Paddy Soil by Altering Nitrogen Reserves

Wang

Lin

et al. 2021

Microorganisms

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“…In farmland, DOM leached from topsoil can be sorbed and thus stored in deep subsoil with a relatively low organic matter content, which is recognized as a carbon reservoir [49][50][51][52]. DOM of autochthonous and allochthonous origins differ in properties and biogeochemical behaviour [53,54]. Joint use of multiple techniques to measure DOM properties is necessary, as no single technique is capable of fully characterizing DOMs [55].…”

Section: Sources and Occurrences Of Dom In Soilmentioning

confidence: 99%

Transport of Veterinary Antibiotics in Farmland Soil: Effects of Dissolved Organic Matter

Gbadegesin

Tang

Liu

et al. 2022

IJERPH

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The application of manure as a fertiliser to farmland is regarded as a major source of veterinary antibiotic (VA) contamination in the environment. The frequent detection of such emerging contaminants and their potential adverse impacts on the ecosystem and human health have provoked increasing concern for VA transport and fate. Extrinsic dissolved organic matter (DOM) may be introduced into farmland soil along with Vas, and thus exert significant effects on the transport of VAs via hydrological processes upon rainfall. The leaching of VAs can be either enhanced or reduced by DOM, depending on the nature, mobility, and interactions of VAs with DOM of different origins. From the aspect of the diversity and reactivity of DOM, the state-of-the-art knowledge of DOM−VA interactions and their resulting effects on the sorption−desorption and leaching of VAs in farmland soil was reviewed. Spectroscopic techniques for examining the extent of binding and reactive components of DOM with VAs are summarized and their usefulness is highlighted. Models for simulating VA transport under the effects of DOM were also reviewed. It is suggested that distinct impacts of DOM of various organic fertiliser/amendment origins should be considered for predicting the transport of VAs in farmland soil.

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“…Up to now, only a few studies combined all these tools to describe DOM in contrasted agricultural soils (Romero et al 2017;Li et al 2019;Sun et al 2020) and their effects on metal speciation in soil solution (Guo et al 2015) or sediments (Xu et al 2019). To our knowledge, only one paper reported the use of these spectroscopic indices for vineyard soils exposed to herbicide glyphosate and Cu-based fungicides (Daouk et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Do DOM optical parameters improve the prediction of copper availability in vineyard soils?

Ouédraogo

Cornu

Janot

et al. 2021

Environ Sci Pollut Res

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Accumulation of copper (Cu) in soils due to the application of fungicides may be toxic for organisms and hence affect winegrowing sustainability. Soil parameters such as pH and dissolved organic matter (DOM) are known to affect the availability of Cu. In this study, we investigated the contribution of chromophoric and fluorescent DOM properties to the prediction of Cu availability in 18 organic vineyard soils in the Bordeaux winegrowing area (France). The DOM parameters, assessed through absorbance and fluorescence analyses, and proxies for Cu availability (total soluble Cu and free ionic Cu 2+ ) were measured in 0.01 M KCl extracts. Total soluble Cu (CuKCl) varied 23-fold while free ionic Cu 2+ varied by a factor of 4,600 among the soils. DOC concentrations were similar among the soils, but the samples differed in the quality of DOM as assessed by optical spectroscopy. Multilinear regression models with and without DOM quality parameters were investigated to predict Cu availability. The best model for CuKCl successfully explained 83 % of variance and included pH, CuT and two DOM fluorescence quality indices, the FI fluorescence index, which distinguishes between microbial and higher plant origins, and the HIX humification index. For the prediction of Cu 2+ , pH alone explained 88 % of variance and adding DOM parameters did not improve modelling. The two Cu availability proxies were related to pH. This study confirms the prominent role of pH in Cu availability and underlines the importance of DOM quality to better predict Cu solubility.

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Compositional and chemical characteristics of dissolved organic matter in various types of cropped and natural Chinese soils

Cited by 26 publications

References 53 publications

Straw Incorporation with Nitrogen Amendment Shapes Bacterial Community Structure in an Iron-Rich Paddy Soil by Altering Nitrogen Reserves

Straw Incorporation with Nitrogen Amendment Shapes Bacterial Community Structure in an Iron-Rich Paddy Soil by Altering Nitrogen Reserves

Transport of Veterinary Antibiotics in Farmland Soil: Effects of Dissolved Organic Matter

Do DOM optical parameters improve the prediction of copper availability in vineyard soils?

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