Tailored cover crop mixtures enhance soil phosphorus cycling but not wheat yield in a short-term column experiment

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Language: Английский

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Evaluating the benefits of legacy phosphate

Plant and Soil, Journal Year: 2022, Volume and Issue: 480(1-2), P. 561 - 570

Published: July 19, 2022

Abstract Aims Many soils in the developed world have been fertilized with phosphate for several decades. Appreciable has accumulated such soils. This is referred to as “legacy P”. The benefits of legacy P are not widely appreciated. Here, we report effects on buffering capacity and consequent effectiveness plant growth, its continuing reaction between soil decreasing decline time. Methods We produced five levels by incubating added at high temperatures 30 days. then measured effect sorption/desorption growth response further additions phosphate. Results Legacy decreased capacity, hysteresis desorption, increased amount a similar state that recently sorbed P. There were analogous growth; fertiliser increased; time decreased; accessible plants increased. think tests reflect only plants. Soil testing services which include estimates decrease increase fertilizer effectiveness. propose simple test rate Conclusions Managing applications using alone underestimates status leads over application It necessary also change A way estimate suggested.

Language: Английский

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Phosphorus speciation in manure and fertilizer impacted Mid‐Atlantic coastal plain soils

Journal of Environmental Quality, Journal Year: 2024, Volume and Issue: 53(3), P. 352 - 364

Published: March 12, 2024

Historical applications of manures and fertilizers at rates exceeding crop P removal in the Mid-Atlantic region (United States) have resulted decades increased water quality degradation from losses agricultural runoff. As such, many growers this face restrictions on future applications. An improved understanding fate, transformations, availability is needed to manage P-enriched soils. We paired chemical extractions (i.e., Mehlich-3, extractable P, fractionation) with nondestructive methods x-ray absorption near edge structure [XANES] spectroscopy fluorescence [XRF]) investigate dynamics eight soils various management histories. Chemical fractionation XRF data were used support XANES linear combination fits, allowing for identification Al, Ca, Fe phosphates sorbed phases amended fertilizer, poultry litter, or dairy manure. Management history speciation make qualitative comparisons between legacy soils; we also speculate about how may affect these without additional With continued applications, expect an increase semicrystalline Al Fe-P, (hydro)oxides, insoluble Ca-P species all sources. Under drawdown scenarios, plant uptake first followed by phases. Our results can help guide decisions coastal plain a application.

Language: Английский

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Long‐term dairy manure amendment promotes legacy phosphorus buildup and mobility in calcareous soils

Journal of Environmental Quality, Journal Year: 2024, Volume and Issue: 53(3), P. 365 - 377

Published: March 31, 2024

Abstract Continuous application of dairy manure to soils can lead excessive phosphorus (P) accumulation (legacy P), which requires understanding for managing nutrient availability and leaching. This study was conducted in Kimberly, ID, where or conventional fertilizer applied calcareous soil plots under continuous crop rotations 8 years (2013–2020), followed by 2 with no amendment. To understand legacy P behavior the soils, total P, organic/inorganic plant‐available Olsen bicarbonate Truog extraction measurements were made from surface subsurface samples. Additionally, soluble less calcium phosphate (Ca‐P) minerals estimated using selective extractions, desorption measured a flow‐through reactor. Manure amendments resulted increased particularly initial 5 years. In 0‐ 30‐cm depth, 54%–65% added readily test. Phosphorus released 2022 manure‐amended experiments about five times greater than fertilizer‐amended soil, suggesting high leaching potential. After amendment, Olsen‐P levels exceeded 40 mg kg −1 management threshold, adsorption potential had become saturated, allowing compared controls. Even after without Ca‐P mineral phases persisted be long‐term source

Language: Английский

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Water dispersible carbon nanomaterials reduced N, P, and K leaching potential in sandy soils: A column leaching study

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 954, P. 176755 - 176755

Published: Oct. 5, 2024

Language: Английский

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