Managing Animal Manure to Minimize Phosphorus Losses from Land to Water

Kleinman, Peter J. A.; Spiegal, Sheri; Liu, Jian; Holly, Mike; Church, Clint; Ramírez-Ávila, John J.

doi:10.2134/asaspecpub67.c12

Cited by 13 publications

(13 citation statements)

References 122 publications

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“…Balancing nutrient inputs with crop needs is a fundamental goal of agricultural sustainability. Nutrient mass balances (or budgets) can be used to assess the impact of management on soil nutrient loading, potential nutrient losses, and drawdown of excess soil nutrients (Drinkwater et al, 1998(Drinkwater et al, , 2017Hanrahan et al, 2019;Kleinman et al, 2020;Öborn et al, 2003;Oenema et al, 2003;Watson et al, 2002b). Oenema et al (2003) define three types of nutrient balances: farm gate, soil surface, and soil system.…”

Section: Introductionmentioning

confidence: 99%

“…When soluble P concentration exceeds the capacity of a soil to adsorb or otherwise store P, P transport, and increased non‐point source pollution of surface and shallow ground water can occur (Maguire et al., 2005; Sharpley et al., 1994). Legacy soil P built up over years of PL applications can increase the risk of losses for many years even after applications cease (Kleinman et al., 2020). These contributions to eutrophication are a problem in ecologically sensitive estuaries globally (Spiegal et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

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Legumes and nutrient management improve phosphorus and potassium balances in long‐term crop rotations

2021

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Balancing P and K inputs with crop needs is challenging in cropping systems applying poultry litter (PL) for N. We compared P and K balances of PL-amended organic and mineral-fertilized conventional systems over 13 yr. In organic systems, lower legume cover crop biomass (3,462 ± 421 vs. 4,691 ± 436 kg ha −1 ) and N contributions in a corn (Zea mays L.)-soybean [Glycine max (L.) Merr.] rotation (Org2) led to 58% greater PL applications to corn than in a corn-soybean-wheat (Triticum aestivum L.) rotation (Org3); as did alfalfa (Medicago sativa L.) in a cornsoybean-wheat-alfalfa rotation (Org6). Greater Org2 and Org3 P inputs reduced harvest exports by 106 and 102 kg ha −1 , respectively, increased mean P balances by 209 kg ha −1 , and mean Mehlich 3 P concentrations by 9.6 mg kg −1 compared to Org6. Alfalfa exported 62% of P and 56% of K applied throughout the Org6 rotation. Due to alfalfa export, the annual P surplus was small (9 kg ha −1 ) and soil P was "optimum" in Org6. Soil test-based fertilizer application in tilled and no-till conventional systems with initially high soil P led to a -124 kg ha −1 P balance and optimum soil P. Fertilizer and PL K applications exceeding crop uptake led to positive K balances in all systems but greater retention of PL than fertilizer K. Legume cover crops or forages and increasing crop rotation length/complexity improved organic system P and K balances. Soil test-based fertilizer application in conventional systems reduced high soil test P while maintaining yields.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Legumes and nutrient management improve phosphorus and potassium balances in long‐term crop rotations

2021

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“…Elements such as P and K, along with nutrient cations, tend to be preserved with drying, resulting in higher concentration in manure solids as water is removed and in a change in the stoichiometry (ratios) of these and other elements. In addition, the physiology of animals (monogastric, ruminant), their diets (protein content, phytase supplementation), and chemical manure manipulation (alum, gypsum, sodium bisulfate) all affect the fertilizer value of manure and its transport potential (Kleinman et al., 2019b). Despite this variation, dry manure is often exported from poultry, dairy, and beef production systems for use elsewhere (Bryant et al., 2022; Dell et al., 2022; Spiegal et al., 2020b).…”

Section: Dimensions Of the Manureshedmentioning

confidence: 99%

Envisioning the manureshed: Toward comprehensive integration of modern crop and animal production

et al. 2022

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The specialization and intensification of agriculture have produced incredible gains in productivity, quality, and availability of agricultural commodities but have resulted in the separation of crop and animal production. A by‐product of this separation has been the accumulation of manure regions where animal production is concentrated. Enter the “manureshed,” an organizing framework for integrating animal and crop production where budgeting of manure nutrients is used to strategically guide their recycling and reuse in agricultural production systems where manure resources are of highest value. To move beyond regional nutrient balance analyses into the transformational realm required to mitigate “wicked” manure problems, manureshed management requires recognition of the challenges to systematically reorganizing resource flows. In better integrating crop and livestock systems, manureshed management must account for the unique nature of managing manure nutrients within individual livestock industries, anticipate trade‐offs in substituting manure for commercial fertilizer, promote technologies to refine manure, and engage extensive social networks across scales that range from the farmgate to nation and beyond.

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“…Successful circular manuresheds require substantial initial investments to transform existing management practices, trade structures, and social networks, with coordinated and collaborative efforts beyond any one animal or feed producer (Kleinman et al., 2019; Meredith, Spiegal, Kleinman, & Harmel, 2022; Sharara et al., 2022; Spiegal et al., 2021). Weighing tradeoffs among different types of sustainability goals (production, environmental, socioeconomic) is essential to predict returns on such investments (Harrison et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Recycling nutrients in the beef supply chain through circular manuresheds: Data to assess tradeoffs

et al. 2022

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Nutrient circularity can help supply chain participants meet sustainability targets. Across the segmented beef supply chain, opportunity exists to reinforce and introduce nutrient circularity by recycling surplus manure nutrients from cattle feedlots to lands where cattle feed is produced. We describe four datasets developed to evaluate options in U.S. and Canadian beef systems. The datasets delineate three “circular manuresheds,” each encompassing a hay‐grazing landscape where beef cattle are raised on grazingland and supplemented with hay grown nearby, and the distant feedlots where those cattle produce manure nutrients for potential import back to the hayfields. We selected the hay‐grazing landscapes of New Mexico, USA; Florida, USA; and western Canada (Manitoba, Saskatchewan, Alberta, British Columbia) because of their significant grazingland production and potential to substitute feedlot manure for commercial fertilizer on hayfields. In each circular manureshed, the manure nutrients from major feedlot destinations could supply a considerable proportion of the P used by hay for grazing cattle: 34% of the P requirements in New Mexico, 36% in Florida, and 6% in western Canada. The average distance to return the resource was 647 km for New Mexico, 1,884 km for Florida, and 1,587 km for western Canada. These magnitudes and distances suggest that the New Mexico circular manureshed may be the most economically viable in the current agri‐food system, but this reflects only part of a greater, multi‐factor assessment of tradeoffs. The circular manureshed concept provides a platform for simultaneous consideration of competing factors for sustainability via circularity.

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Managing Animal Manure to Minimize Phosphorus Losses from Land to Water

Cited by 13 publications

References 122 publications

Legumes and nutrient management improve phosphorus and potassium balances in long‐term crop rotations

Legumes and nutrient management improve phosphorus and potassium balances in long‐term crop rotations

Envisioning the manureshed: Toward comprehensive integration of modern crop and animal production

Recycling nutrients in the beef supply chain through circular manuresheds: Data to assess tradeoffs

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