Structure and biodegradability of dissolved organic matter from Ultisol treated with long-term fertilizations

Xu, Peidong; Zhu, Jun; Fu, Qingling; Chen, Jiazhou; Hu, Hongqing; Huang, Qiaoyun

doi:10.1007/s11368-018-1944-0

Cited by 41 publications

(14 citation statements)

References 24 publications

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“…In accordance with Zhang et al (2019) and Xu et al (2018), in our experiment humic-like components were the dominant fractions of leached DOM irrespective of soil and fertilizer type. Initial DOM originating from fertilized silt loam soil revealed a high aromaticity (Fi), a higher microbial activity (BIX) and a smaller molecular size (E2:E3) than the corresponding control.…”

Section: Composition Of Leached Organic Mattersupporting

confidence: 86%

“…Furthermore, Fang et al (2014) observed an increase in aromaticity and molecular complexity of WEOM caused by mineral fertilization of an alpine meadow, while organic fertilization experiments conducted on forest soils did not affect WEOM compositions, according to a study by Ohno and Bro (2006). Moreover, in a study testing nonfertilized controls and mineral (NPK) fertilized samples of an Ultisol, an increase of molecular weight and higher ratio of microbially derived WEOM were observed, while organic fertilization had no impact on WEOM (Xu et al, 2018). One problem, however, is the current lack of a standardised method to obtain WEOM in soils.…”

Section: Introductionmentioning

confidence: 92%

“…2011; Xu et al, 2018). Ferrari et al (2011) suggested that long-term organic fertilization led to an enrichment of organic N, thus enhancing the lignin decomposition of crop residues.…”

Section: Composition Of Leached Organic Mattermentioning

confidence: 99%

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Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate

Tiefenbacher

Weigelhofer

Klik

et al. 2020

Preprint

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Abstract. Besides the importance of dissolved organic matter (DOM) in soil biogeochemical processes, there is still a debate on how agricultural intensification affects the composition and concentration of dissolved organic matter leached from soils into adjacent aquatic ecosystems. In order to investigate the immediate response of DOM leaching to fertilization, we conducted a short-term (45 day) lysimeter experiment with undisturbed silt loam and loamy sand soil cores. Mineral (calcium ammonium nitrate) or organic (pig slurry) fertilizer was applied on the soil surface with a concentration equivalent to 130 kg N ha−1. After fertilization, soil leachate was collected in 6-days intervals. Dissolved organic carbon concentrations (DOC) were measured with gas chromatography, while shifts in DOM composition were analysed using absorbance and excitation- emission fluorescence indices from peak-picking as well as from PARAFAC analysis. During the first 12 days, fertilization of a silt loam reduced DOC concentrations in the leachate and shifted its composition towards more microbial- like compounds. Additionally, the discrepancy in DOM composition between fertilizer and control treatments of a silt loam increased with time. However, in loamy sand only mineral fertilization affected organic matter leaching and decreased DOC concentrations in the leachate during the first 12 days. Furthermore, mineral fertilization of the loamy sand led to DOM compounds with low molecular size in the first 12 days. Our results show that fertilization tends to increase microbial transformed DOM, while it reduces leached DOC concentrations. Furthermore, the magnitude of fertilization on DOC concentrations and DOM composition was highly depending on the soil texture they originate from. However, in our set-up, the experimental soil units were restricted to a soil depth of 16 cm (Ap horizon). At ecosystem level, a sufficiently long soil passage might mitigate the impact of fertilization on soil DOM.

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Section: Composition Of Leached Organic Mattersupporting

confidence: 86%

Section: Introductionmentioning

confidence: 92%

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Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate

Tiefenbacher

Weigelhofer

Klik

et al. 2020

Preprint

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“…After the incubation, DOC content was in the order MR > SR > MB > SB > CK, and MBC content was in the order SR > MR > MB > SB > CK. Previous studies show that inputs of organic C can alter DOC and increase the lability, thereby increasing availability for soil microbes (Ghosh et al, 2018; Xu et al, 2018). The laboratory incubation experiment conducted with constant temperature and humidity indicated that DOC and MBC were mineralized.…”

Section: Discussionmentioning

confidence: 99%

Long‐term cultivation of Miscanthus and switchgrass accelerates soil organic carbon accumulation by decreasing carbon mineralization in infertile red soil

Hou

et al. 2022

GCB Bioenergy

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Perennial energy crops (PECs) such as Miscanthus spp. and switchgrass (Panicum virgatum L.) may have particular influence on microbial communities and their functions in soil organic carbon (C) utilization and mineralization (Cm). In this study, long‐term effects of PECs on Cm and soil hydrolase activities were examined in bulk and rhizosphere soils of Miscanthus and switchgrass grown on a red soil in South China. Long‐term cultivation (10 years) of PECs led to increases in soil organic C (SOC) and the absolute Cm of bulk and rhizosphere soils. Total Cm was correlated with dissolved organic C and dissolved organic nitrogen (N) in red soils. The specific Cm in bulk soils of switchgrass and Miscanthus were decreased by 11.73% and 20.67% comparing with the control group, respectively. Cultivation of PECs led to a relatively high C/N ratio. There was a difference in priming effect on activities of β‐glucosidase (BG), leucine amin peptidase, N‐acetyl‐β‐glucosaminidase (NAG), and phosphatase between rhizosphere and bulk soils. Compared with the control without PECs, BG activity did not change significantly in bulk soils of PECs, whereas NAG activity decreased significantly. Soil microorganisms were generally limited by soil C and phosphorus (P) in the red soil. The C and P limitations were significantly linearly related with relative Cm (p < 0.05). Phosphorus limitations in microbial communities were lower with PECs than in the control, indicating that cultivation of PECs could provide an optimal nutrient environment for both plants and microorganisms. Thus, long‐term cultivation of PECs increased SOC content but decreased specific Cm rates. However, because C and P limitations remain for plants and soil microbial communities, optimum fertilization is also necessary for sustainable growth of PECs on red soils.

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“…One of the soil orders targeted for maize development is Ultisols because this soil reaches 25% of the total land area in Indonesia. This soil is present in the tropical zone and characterized by low fertility (Xu et al 2018). Moisture stress is a significant problem in this soil.…”

Section: Introductionmentioning

confidence: 99%

Effect of Organic Amendments on the Water Stress Resistance of Corn Varieties during Vegetative Stage in Ultisols

Bukhari

Zakaria

Sufardi

et al. 2022

IJARe

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Background: Water stress is one of the most crucial limiting factors in maize production on Ultisols. One solution that could be adopted to solve this problem is applying organic soil amendment. Methods: This study evaluated three varieties of corn: NK-Jumbo, Srikandi Kuning and Lamuru. The water stress treatment consists of 75% field capacity (without water stress) and 37.5% field capacity (water stress treatment). The organic amendment consists of without soil amendment, rice-straw 10 tons ha-1, biochar 10 tons ha-1 and rice straw 5 tons ha-1 + biochar 5 tons ha-1. A factorial, completely randomized design was used in this research. Result: Water stress and organic amendments affect total stomata, leaf curl, leaf area, proline content, shoot and root dry weight, shoot-root ratio and biomass production of corn. Applying organic amendments increases corn’s resistance to water stress, indicated by decreased plant proline content and increased biomass. The proline content of corn by application of organic amendment with rice straw 5 tons ha-1 + biochar 5 tons ha-1 (70.41 µ mol/g) was lower than the proline content of treatment without amendments (93.69 µ mol/g). NK-Jumbo was the most resistant variety to water stress conditions.

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Structure and biodegradability of dissolved organic matter from Ultisol treated with long-term fertilizations

Cited by 41 publications

References 24 publications

Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate

Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate

Long‐term cultivation of Miscanthus and switchgrass accelerates soil organic carbon accumulation by decreasing carbon mineralization in infertile red soil

Effect of Organic Amendments on the Water Stress Resistance of Corn Varieties during Vegetative Stage in Ultisols

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