Differential responses of the properties of soil humic acid and fulvic acid to nitrogen addition in the North China Plain

Kou, Bing; Hui, Kunlong; Miao, Fang; He, Yue; Qu, Chengtun; Yuan, Ying; Tan, Wenbing

doi:10.1016/j.envres.2022.113980

Cited by 14 publications

(3 citation statements)

References 81 publications

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“…Mineral fertilisers promote the formation of more valuable MHAs in the CL and GR. According to [43], N addition can alter the physical and chemical properties of soil, which can affect soil enzyme activity, microbial biomass, quality indices, and the composition distribution of HAs and FAs. However, it should be noted that Ref.…”

Section: Discussionmentioning

confidence: 99%

Exploring the Influence of Natural and Agricultural Land Use Systems on the Different Lability Organic Carbon Compounds in Eutric Endocalcaric Arenosol

Tripolskaja,

Amaleviciute-Volunge,

Kazlauskaite-Jadzevice

et al. 2024

Sustainability

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It is important to ensure the ratio of stable and labile soil organic carbon (SOC) compounds in the soil as this influences ecosystem functions and the sustainability of soil management. The aim of this investigation was to determine the changes in SOC compounds and soil quality improvement in Arenosol soil after the conversion of arable land to natural and agricultural land use. The land use types included pine afforestation (PA), uncultivated abandoned land (UAL), unfertilised and fertilised cropland (CLunf, CLf), and unfertilised and fertilised grassland (GRunf, GRf). To assess the lability of organic carbon (OC) compounds, levels of mobile humic substances (MHSs), mobile humic acids (MHAs), mobile fulvic acids (MFAs), active C pool (POXC), and water-soluble C (WEOC) compounds were determined. It was found that faster OC accumulation occurs in PA soil than in CLf, and is somewhat slower in grassland uses (GRf and UAL). As the amount of SOC increased, more MHS formed. A significant increase in their quantity was found in PA (+92.2%) and CRf and UAL (+51.5–52.7%). The application of mineral fertilisers promoted the formation of MHSs in CLf and GRf. PA, GRunf, and GRf soils had more suitable conditions for MHA formation (MHA/MFA > 1.3), whereas CLunf soil contained more MFAs. The POXC pool was insensitive to land-use changes in the Arenosol. After land-use conversion, POXC amounts were significantly (p < 0.05) higher in natural ecosystems (UAL and PA) and fertiliser perennial grasses than in CL. The amount of WEOC increased the most in UAL, PA, and GRf (7.4–71.1%). The sequence of decrease in land use was GRf, UAL, and PA > CLunf, CLf, and GRunf. The decreasing order of the carbon management index (CMI) of different land uses (PA > UAL > GRf > GRunf > Clunf) confirms that faster OC accumulation in Arenosol soil occurred in PA and grassland land uses (GRf and UAL). The values of the carbon lability index (CLI) variation (CLunf > GRunf GRf > UAL > PA) show that in PA, UAL, and GRf land uses, mobile organic matter (OM) forms are relatively less formed, which stabilises OC accumulation in the soil. The CMI showed that UAL and GRf were the most suitable soil uses for Arenosol soils.

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Section: Discussionmentioning

confidence: 99%

Exploring the Influence of Natural and Agricultural Land Use Systems on the Different Lability Organic Carbon Compounds in Eutric Endocalcaric Arenosol

Tripolskaja,

Amaleviciute-Volunge,

Kazlauskaite-Jadzevice

et al. 2024

Sustainability

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“…Various compounds like peat soil, compost, and leonardite produce HA. The production and level of decomposition of HA or FA regulate their activities on crop plants, their composition, and their structure (Kou et al, 2022). Aside from alkali and acid feature differences, HA and FA also differ in makeup elements and their molecular size, which can supply knowledge of differences as biostimulants.…”

Section: Humic and Fulvic Acidsmentioning

confidence: 99%

The potential of biostimulants on soil microbial community: a review

Adedayo,

Babalola

2023

Front. Ind. Microbiol.

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To improve agricultural sustainability, an agriculturally productive system is required to maintain soil fertility and reduce the loss of soil biodiversity. One of the modern technologies employs microbial biostimulants that create abundant agricultural yield with high nutritional values, controlling disadvantages obtained from environmental changes. This review aimed to provide knowledge on the effects of biostimulants on microbial communities’ potential to promote agricultural production. Plant biostimulants are novel materials applied in the farming sector nowadays to improve crop yield and commonly occur in plant seeds and as an alternative to chemical derivative application on crop plants. Microbial biostimulants function as biological inputs to increase crop production and reduce the decomposition of soil. In conclusion, the application of biostimulants necessitates the accomplishment of an absolute choice of beneficial microbes as well as the potential to combat problems that will be encountered later in the agricultural sector.

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“…The main active components of SOM are humic substances (HS), which are produced by chemical activities in natural environments, including aquatic ecosystems, soils, and sediments, and have a major impact on biogeochemical processes (DiDonato et al, 2016 ; Zaiets and Poch, 2016 ). HS can be further classified into the groups of humic acid (HA), fulvic acid (FA), and humin (HM) (Kou et al, 2022 ). HA and FA are the most active components in soil HS and play important roles in enhancing soil aggregation, maintaining soil fertility, increasing soil buffering capacity, and regulating pH (Lehmann and Kleber, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of different types of vegetation cover on soil microorganisms and humus characteristics of soda-saline land in the Songnen Plain

Guo,

Tóth,

Yang

et al. 2023

Front. Microbiol.

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IntroductionIn the soda-saline grasslands of the Songnen Plain, Jilin Province, China, the prohibition of grazing has led to significant changes in plant communities and soil properties. However, the intricate interplay between soil physical and chemical attributes, the soil microbial community, and their combined influence on soil humus composition remains poorly understood.MethodsOur study aimed to evaluate the impact of natural vegetation restoration on soil properties, microbial community diversity, and composition in the soda-saline soil region of the Songnen Plain. We conducted assessments of soil physical and chemical properties, analyzed community diversity, and composition at a soil depth range of 0–20 cm. The study covered soils with dominant soda-saline vegetation species, including Suaeda glauca Bunge, Puccinellia chinampoensis Ohwi, Chloris virgata Swarta, Phragmites australis (Clay.), Leymus chinensis (Trin.), and Tzvelev. We compared these vegetated soils to bare land devoid of any plants.ResultsWe found that soil organic content (SOC) in vegetation restoration areas was higher than in bare land, with SOC content varying between 3.64 and 11.15 g/kg in different vegetated areas. Notably, soil pH emerged as a pivotal factor, explaining 11.4% and 12.2% of the variance in soil bacteria and fungi, respectively. There were correlations between SOC content and the relative abundance of specific microbial groups, with Acidobacteria and Mortierella showing a positive correlation, while Actinobacteria, Gemmatimonadetes, and Ascomycota exhibited significant negative correlations with SOC.DiscussionThe disparities in SOC composition and content among the soda-saline vegetation types were primarily attributed to variations in pH. Consequently, reducing soil pH is identified as a critical step in the process of vegetation restoration in soda-saline land. Prohibiting grazing has the potential to increase soda-saline SOC content and enhance microbial diversity, with Leymus chinensis and Phragmites australis showing particularly promising results in terms of higher SOC carbon content and microbial diversity.

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Differential responses of the properties of soil humic acid and fulvic acid to nitrogen addition in the North China Plain

Cited by 14 publications

References 81 publications

Exploring the Influence of Natural and Agricultural Land Use Systems on the Different Lability Organic Carbon Compounds in Eutric Endocalcaric Arenosol

Exploring the Influence of Natural and Agricultural Land Use Systems on the Different Lability Organic Carbon Compounds in Eutric Endocalcaric Arenosol

The potential of biostimulants on soil microbial community: a review

Effects of different types of vegetation cover on soil microorganisms and humus characteristics of soda-saline land in the Songnen Plain

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