Phosphorus adsorption and desorption characteristics of different textural fluvo-aquic soils under long-term fertilization

Yun-hong, Zhang; Huang, Shaomin; Guo, Doudou; Zhang, Shuiqing; Song, Xiao; Yue, Ke; Ke-ke, Zhang; Bao, Dejun

doi:10.1007/s11368-018-2122-0

Cited by 23 publications

(10 citation statements)

References 38 publications

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“…In addition to pH and Mn d , soil texture is also believed to contribute to the observed variations in Q m , albeit to a lesser extent. In particular, it was found that silt was more closely associated with Q m than the clay content of soil, which was consistent with the findings reported by Nwoke et al (2003) [ 70 ] and Zhang et al (2019) [ 76 ].…”

Section: Discussionsupporting

confidence: 91%

Phosphorus status and adsorption characteristics of perennial vegetable-cultivated soils in South China

et al. 2022

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Phosphorus (P) is an essential element for crop production and a key source of nonpoint pollution in agroecosystems. In this study, we sought to analyze P levels and the factors affecting soil P availability, via P adsorption, in a typical field system that is characterized by the year-round cultivation of vegetables. A total of 190 sites were sampled from vegetable fields in Guangdong Province, South China. Within the research area, average concentrations of 124.49 mg P kg-1 and 1.55 g P kg-1 were recorded for available P (AP) and total P (TP), respectively, which are 8.53- and 1.78-fold higher, respectively, than the corresponding values recorded in 1980. The determined P adsorption maximum (Qm) averaged at 488.38 mg kg-1, which represents a reduction of 16% compared to the values obtained four decades ago. Accumulations of both TP and AP were found to be negatively correlated with the soil’s maximum adsorption buffering capacity (MBC), although no significant correlations with the soil binding energies (k) and Qm, were seen. However, soil pH was found to be significantly correlated with k and Qm. Furthermore, both free Mn oxides (Mnd) and silt concentrations in the soil were found to contribute to explaining the variations in Qm. Collectively, the findings of this study provide evidence to indicate that there has been an excessive accumulation of P in the perennial vegetable fields of Guangdong Province over the past four decades, which may have had negative effects on the P supply potential of the soil by reducing the maximum adsorption buffering capacity.

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Section: Discussionsupporting

confidence: 91%

Phosphorus status and adsorption characteristics of perennial vegetable-cultivated soils in South China

et al. 2022

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“…It means that beyond a certain SOM value, both P bond capacity and intensity were increased so that can be a reason for negative relation between SOM and CaCl 2 -P O in the alkaline chernozem soils studied. Besides, some studies made in alkaline soils suggested that SOM was beneficial to P adsorption because of anionic character of SOM which can bind electrostatically cations such as Ca 2+ , Fe 3+ , and Al 3+ and these cations promote P retention [46,47]. Overall, the influence of SOM on P adsorption depends on the type and concentration of organic material and the soil types, respectively, which is in accordance with the idea made by Debicka et al [48].…”

Section: Role Of Soil Physicochemical Properties and Fe/al Oxides On ...supporting

confidence: 79%

Organic phosphorus leaching risk from agricultural soils across China

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Bol

Klumpp

et al. 2022

Chem. Biol. Technol. Agric.

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Background Leaching from agricultural land is one of the major pathways of phosphorus (P) loss from soils to waterbody and may induce adverse effect on territorial environment. Past studies usually focused on the loss of inorganic P (PI) while ignored the role of organic P (PO) in leaching process. A total of 63 agricultural soil samples were collected from across China with various soil types including 21 paddy soils, 13 chernozems, 11 red soils and other type soils (n = 18) to identify the potential risk of PO and PI leaching from agricultural lands and to explore their relationships with soil basic properties, Fe/Al oxides, and P status. Results CaCl2-extractable organic P (CaCl2-PO) accounted for 8–89% (35% on average) of CaCl2-extractable total P (CaCl2-PT) and available organic P (APO) accounted to over half of available total P (APT) (57 ± 25%). CaCl2-PT was positively correlated with APT under all soil types except paddy soils. CaCl2-extractable inorganic P (CaCl2-PI) and available inorganic P (API) were strongly correlated for chernozem (r = 0.968), while CaCl2-PO the was strongly correlated with APO for red soils (r = 0.901). Conclusions PO greatly contributed to the potential P leaching risk and should be included in the risk assessment of total P leaching. The control of soil APT excess accumulation in both PO and PI fractions in agricultural land is the key point to cut down P leaching. Mitigation measures to limit PO leaching should be established based on the soil types. Graphical abstract

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“…Al and Fe oxides are the primary sources of fluctuating charge in red soils. Many studies have reported that SOC results in competitive adsorption by occupying some P adsorption sites [18][19][20]. In contrast, [21] revealed that SOC can boost the adsorption capability of P in some sandy textured soils.…”

Section: Introductionmentioning

confidence: 99%

Impacts of long-term inorganic and organic fertilization on phosphorus adsorption and desorption characteristics in red paddies in southern China

et al. 2021

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Soil phosphorus (P) adsorption and desorption occur in an important endogenous cycle linked with soil fertility problems and relevant to the environmental risk assessment of P. In our study, the effect of long-term inorganic and organic fertilization on P adsorption and desorption characteristics in relation to changes in soil properties was evaluated by selecting three long-term experimental sites in southern China. The selected treatments at each site were CK (unfertilized), NPK (synthetic nitrogen, phosphorus and potassium) and NPKM (synthetic NPK plus manure). The adsorption and desorption characteristics of P were evaluated using Langmuir and Freundlich isotherms. The results showed that long-term application of NPK plus manure significantly increased soil organic carbon (SOC), total P and available P at all three sites compared with the NPK and CK treatments. All three treatments fit these equations well. The maximum adsorption capacity (Qm) of P increased with NPKM treatment, and the binding energy of P (K) and the maximum buffering capacity (MBC) showed increasing trends. NPKM showed the highest Qm (2346.13 mg kg-1) at the Jinxian site, followed by Nanchang (221.16 mg kg-1) and Ningxiang (2219.36 mg kg-1). Compared to CK and NPK, the NPKM treatment showed a higher MBC as 66.64, 46.93 and 44.39 L kg-1 at all three sites. The maximum desorption capacity (Dm) of P in soil was highest with the NPKM treatment (157.58, 166.76, 143.13 mg kg-1), showing a better ability to release P in soil. The correlation matrix showed a significant positive correlation of SOC, total and available P with Qm, Dm and MBC. In conclusion, it is suggested that manure addition is crucial to improve P utilization in red paddy soils within the recommended range to avoid the risk of environmental pollution.

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Phosphorus adsorption and desorption characteristics of different textural fluvo-aquic soils under long-term fertilization

Cited by 23 publications

References 38 publications

Phosphorus status and adsorption characteristics of perennial vegetable-cultivated soils in South China

Phosphorus status and adsorption characteristics of perennial vegetable-cultivated soils in South China

Organic phosphorus leaching risk from agricultural soils across China

Impacts of long-term inorganic and organic fertilization on phosphorus adsorption and desorption characteristics in red paddies in southern China

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