Land use and landscape position influence soil organic phosphorus speciation in a mixed land use watershed

Perillo, Vanesa Liliana; Cade-Menun, Barbara J.; Ivancic, Monika; Ross, Donald S.; Wemple, Beverley C.

doi:10.1002/jeq2.20237

Cited by 9 publications

(5 citation statements)

References 54 publications

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“…This increase in upper horizons results from receiving annual inputs of chemical fertilizers and/or manure. While these P sources increased production, they can also be important sources of P into surface waters due to leaching, runoff erosion (Perillo et al 2021).…”

Section: Discussionmentioning

confidence: 99%

Organic/Inorganic phosphorus forms and transformation in long-term paddy cultivation in the Pearl River Delta, China

Tang

Liu

Jia

et al. 2022

Preprint

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Soil P availability in subtropical regions is often limited due to depletion as well as immobilization by abundant Fe minerals. Identification and quantification of different soil phosphorus (P) fractions is important for improving agricultural productivity and developing sustainable management practices in these agricultural soils under long-term cultivation due to limited P efficiency. However, few studies have been conducted to investigate P composition and transformation in these soils. This study was conducted to characterize P fractions as affected by different paddy cultivation ages (200, 400 and 900 years) among soils of the Pearl River Delta Plain in China. A sequential chemical fractionation scheme was employed as well as enzyme assay and 31P nuclear magnetic resonance spectroscopy (31P NMR) to quantify various P fractions and species. Results showed Total P (TP) and available P (AP) increased with cultivation age, ranging from 0.60–2.12 g kg− 1 and 3.67-224.17 mg kg− 1, respectively. Easily-labile, moderately-labile and non-labile P had similar relationship in topsoils (Ap1, Ap2 horizon) with TP and AP, and inversed relationships in the subsoil (Br3, G horizons). Analysis with 31P NMR spectroscopy revealed that inorganic P including orthophosphate (Ortho-P) and pyrophosphate (Pyro-P) increased with cultivation age, while organic species monoester phosphate (Mono-P) and diester phosphate (Diester-P) decreased. Moreover, acid phosphatase (AcP) and neutral phosphatase (NeP) activities increased with cultivation age and positively correlated with P fractions (p < 0.05). NeP, AcP, exchangeable Ca and sand content are the main factors of affecting soil P composition, however, non-labile P (Dil.HCl-Pi) and Pyro-P made a significant contribution to P availability. Therefore, long-term paddy cultivation, influenced by these soil parameters including NeP, AcP, exchangeable Ca and sand, accelerated the transformation of soil organic to inorganic P.

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Section: Discussionmentioning

confidence: 99%

Organic/Inorganic phosphorus forms and transformation in long-term paddy cultivation in the Pearl River Delta, China

Tang

Liu

Jia

et al. 2022

Preprint

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“…Farming, irrigation, and other agricultural activities accelerate the damage to the soil, resulting in a large amount of phosphorus loss after rainfall. This case indicated that different land use modes will change the form of soil phosphorus and then affect the loss of phosphorus in runoff [43]. From another aspect, Notes: DRP 1 , dissolved reactive phosphorus; CP 2 , colloidal phosphorus; USDA 3 , high permeability sandy loam.…”

Section: Factors That Influence Phosphorus Lossmentioning

confidence: 95%

Characteristics of Phosphorus Loss from Organic Farming and Forestry Land under Simulated Rainfall in the Mountainous Areas of Western Anhui

Xu¹,

Jiang²,

Xia³

et al. 2023

Pol. J. Environ. Stud.

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The representative vegetable plots (Allium hookeri) and economic forest lands (Cuilan Tea) were selected as the studied objects to explore the characteristics of phosphorus loss in surface and subsurface runoff from organic farming and forestry in the western Anhui Mountains. Rainfall experiments were carried out by simulating small, medium, and large rainfall intensities (0.6, 0.9, and 1.5 mm/min, respectively) in the field. The results show that the range of phosphorus loss in the surface runoff from organic vegetable plots and tea plots accounts for 52.5%-69.5% and 56%-71.7% of the total phosphorus, respectively. The proportion of phosphorus loss increases with the increase in rainfall intensity. Moreover, vegetation coverage and tillage methods (soil looseness) affect the difference in phosphorus loss in agricultural and forestry land. Particulate phosphorus (PP) is the main form of phosphorus loss in surface runoff in this area. Dissolved phosphorus (DP) is the main form of phosphorus loss in the subsurface runoff, and the main DP is dissolved inorganic phosphorus. Moreover, phosphorus loss in subsurface runoff is still high. This study provided a reference for the accounting of organic farming and forestry pollution sources and the subsequent prevention and control of non-point source pollution.

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“…Estuarine ecosystems are affected by changes in nutrient flux and by the composition of upstream freshwater discharges (Buzelli et al., 2013; Li et al., 2016; Li et al., 2017). The proportion of nitrogen (N) and phosphorus (P) forms discharged into water bodies can be affected by the nutrient source (Jarvie et al., 1998; Ma et al., 2020), changes in land use and management (Liu et al., 2018; Perillo et al., 2021; Zhang et al., 2021), sediment particle size and erosion along waterways (Kerr et al., 2011), and aquatic plant detritus decomposition and nutrient turnover (Stuck et al., 2001; Zhou et al., 2018). Concentrations of N and P forms exhibit a strong negative relationship with water flow when they originate from point sources due to the dilution of nutrients under high flow.…”

Section: Introductionmentioning

confidence: 99%

Changes in nitrogen and phosphorus within a decade in waters along a major canal and estuary in South Florida

2022

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The West Palm Beach-C51 (WPB-C51) canal connects Lake Okeechobee with Lake Worth Lagoon (LWL) in South Florida. This canal receives discharges from Lake Okeechobee and from agricultural and urbanized areas. The objectives of this research were to determine spatial and temporal differences and trends of N and P forms along the WPB-C51 canal and LWL for 2009-2019. Data were obtained from the South Florida Water Management District. Average total P (TP) and total N (TN) concentrations at studied stations ranged from 55 to 183 μg L −1 and from 0.61 to 2.62 mg L −1 , respectively. The TP and TN concentrations at LWL inflow were higher than the State of Florida's regulatory criteria (49 μg L −1 and 0.66 mg L −1 , respectively). The TP and TN concentrations generally declined from Lake Okeechobee to LWL; however, agricultural drainage was highest for soluble reactive P (SRP) and all N forms. Temporal trends showed predominantly increasing trends for concentrations of P forms. Total P and TN load rates increased by 0.005 and 0.032 t yr −1 , respectively, at LWL inflow. Results suggest nutrient assimilation by plants and P precipitation along the WPB-C51 canal. Possible sources of SRP and N are fertilizers, nitrification, and organic matter mineralization. Increasing trends in P concentration are possibly due to legacy P and urbanization, and increases in TP and TN loads can be due to larger Lake Okeechobee discharges and higher nutrient concentrations. Results emphasize the need to implement strategies to minimize nutrient input into LWL to meet its water quality goals.

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Land use and landscape position influence soil organic phosphorus speciation in a mixed land use watershed

Cited by 9 publications

References 54 publications

Organic/Inorganic phosphorus forms and transformation in long-term paddy cultivation in the Pearl River Delta, China

Organic/Inorganic phosphorus forms and transformation in long-term paddy cultivation in the Pearl River Delta, China

Characteristics of Phosphorus Loss from Organic Farming and Forestry Land under Simulated Rainfall in the Mountainous Areas of Western Anhui

Changes in nitrogen and phosphorus within a decade in waters along a major canal and estuary in South Florida

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