Nitrogen dynamics following slurry injection in maize: soil mineral nitrogen

Westerschulte, Matthias; Federolf, Carl-Philipp; Trautz, Dieter; Broll, Gabriele; Olfs, Hans‐Werner

doi:10.1007/s10705-016-9799-5

Cited by 15 publications

(11 citation statements)

References 43 publications

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“…Preventing nitrification of slurry NH 4 -N through the use of an inhibitor is likely to enhance this interaction between NH 4 -N and DCP in the rhizosphere, whilst at the same time maximizing the long-term availability of N by reducing the risk of NO 3 -N leaching. For example, in a field trial Westerschulte et al (2016) found that addition of a nitrification inhibitor increased the NH 4 -N concentration in the slurry injection zone, which may ensure a higher uptake of NH 4 -N and hence an improved availability of DCP. It is recognized, however, that it is unclear how the positive interacting effects between NH 4 -N uptake and DCP availability identified in the present study are affected by other components present in manure such as buffering compounds (Sommer and Husted, 1995), which could reduce the rhizosphere acidification if the slurry is placed below the maize row.…”

Section: Implications For Nutrient Management In Maize Cropping Systemsmentioning

confidence: 99%

Fertilizer ammonium : nitrate ratios determine phosphorus uptake by young maize plants

Pedersen

Sørensen

Rasmussen

et al. 2019

J. Plant Nutr. Soil Sci.

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We investigated the interacting effects of inorganic nitrogen and the main inorganic phosphorus form in dairy manure (dicalcium phosphate, CaHPO4) on growth, nutrient uptake, and rhizosphere pH of young maize plants. In a pot experiment, three levels of CaHPO4 (0, 167, and 500 mg P pot−1) were combined with nitrogen (637 mg N pot−1) applied at five NH4‐N : NO3‐N ratios (0 : 100, 25 : 75, 50 : 50, 75 : 25, and 100 : 0) and a nitrification inhibitor in a concentrated layer of a typical acid sandy soil from Denmark. 15N‐labeled NH4‐N was applied to differentiate the role of nitrification and to partition nitrogen uptake derived from NH4‐N. Among treatments including nitrogen, shoot biomass, rooting and phosphorus uptake were significantly higher at the five‐leaf stage when CaHPO4 was applied with NH4‐N : NO3‐N ratios of 50 : 50 and 75 : 25. In these treatments, rhizosphere pH dropped significantly in direct proportion with NH4‐N uptake. The fertilizers in the concentrated layer had a root‐inhibiting effect in treatments without phosphorus supply and in treatments with pure NO3‐N or NH4‐N supply. Increased nitrogen uptake as NH4‐N instead of NO3‐N reduced rhizosphere pH and enhanced acquisition of applied CaHPO4 by young maize plants, which may have positive implications for the enhanced utilization of manure phosphorus.

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Section: Implications For Nutrient Management In Maize Cropping Systemsmentioning

confidence: 99%

Fertilizer ammonium : nitrate ratios determine phosphorus uptake by young maize plants

Pedersen

Sørensen

Rasmussen

et al. 2019

J. Plant Nutr. Soil Sci.

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“…This indicates that

{NO}_{3}^{-} - N

availability within the injection zones of the treatments without the addition of DMPP considerably increased due to nitrification of manure

{NH}_{4}^{+} - N

. In field experiments very high shares of

{NO}_{3}^{-} - N

(up to 100 mg

{NO}_{3}^{-} - N

kg −1 soil DM) were detected within such manure injection zones ( Westerschulte et al, ), substantiating this hypothesis. The high N 2 O emissions also indicate that other requirements for denitrification [low O 2 content and supply of easily available C ( Saggar et al, ) due to the application of the manure] were also satisfied in the injection zones.…”

Section: Resultsmentioning

confidence: 69%

“…Northwestern Germany is a hotspot for livestock husbandry and biogas production. Maize ( Zea mays L.) is the most important fodder for dairy farms and substrate for biogas production in this region ( Westerschulte , ). Besides broadcast slurry application, side‐dressed mineral nitrogen (N) and phosphorus (P) fertilizers ensure maize's early growth development.…”

Section: Introductionmentioning

confidence: 99%

“…However, this practice can lead to nutrient surpluses. Replacing mineral fertilizer by liquid manure injected below the maize seeds before sowing reduces these surpluses ( Federolf et al, ) and enhances nitrogen use efficiency due to lower ammonia losses ( Webb et al, ) and reduced nitrate leaching ( Westerschulte , ). However, this application technique has the major drawback of increasing nitrous oxide (N 2 O) emissions by creating an anaerobic environment rich in inorganic N and readily oxidizable carbon ( Ruser and Schulz , ).…”

Section: Introductionmentioning

confidence: 99%

“…Adding liquid manure to soil does not increase the

{NO}_{3}^{-}

concentration in the soil solution directly. However, under aerobic conditions ammonium contained in liquid manure is gradually converted to

{NO}_{3}^{-}

after the manure is injected into soil ( Westerschulte , ). Nitrification inhibitors (NI) like 3,4‐dimethypyrazole phosphate (DMPP) delay the microbial conversion of ammonia (NH 3 ), which is in an equilibrium with

{NH}_{4}^{+}

, to hydroxylamine ( Dittert et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Effect of the nitrification inhibitor DMPP on nitrous oxide emissions and the stabilization of ammonium following the injection of dairy slurry and digestate in a soil‐column experiment

Huf

Olfs

2020

J. Plant Nutr. Soil Sci.

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Injection of slurry or digestate below maize seeds is a relatively new technique developed to improve nitrogen use efficiency. However, this practice has the major drawback of increasing nitrous oxide (N2O) emissions. The application of a nitrification inhibitor (NI) is an effective method to reduce these emissions. To evaluate the effect of the NI 3,4‐dimethypyrazole phosphate (DMPP) on N2O emissions and the stabilization of ammonium, a two‐factorial soil‐column experiment was conducted. PVC pipes (20 cm diameter and 30 cm length) were used as incubation vessels for the soil‐columns. The trial consisted of four treatments in a randomized block design with four replications: slurry injection, slurry injection + DMPP, digestate injection, and digestate injection + DMPP. During the 47‐day incubation period, N2O fluxes were measured twice a week and cumulated by linear interpolation of the gas‐fluxes of consecutive measurement dates. After completion of the gas flux measurement, concentration of ammonium and nitrate within the soil‐columns was determined. DMPP delayed the conversion of ammonium within the manure injection zone significantly. This effect was considerably more pronounced in treatment digestate + NI than in treatment slurry + NI. Regarding the cumulated N2O emissions, no difference between slurry and digestate treatments was determined. DMPP reduced the release of N2O significantly. Transferring the results into practice, the use of DMPP is a promising way to reduce greenhouse gas emissions and nitrate leaching, following the injection of slurry or digestate.

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Does fall manure injection cause differential growth and forage nutritive value in small grains?

Hilfiker,

Maguire,

Ferreira

et al. 2024

Agronomy Journal

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Producers utilizing fall manure injection have reported increased growth and greenness in small grains growing on the injection band compared to small grains growing between injection bands. To determine how producers utilizing fall manure injection in small grains should manage potential differential growth, 24 sites under fall manure injection were established. Soil samples were taken in‐band and between‐band 1 month after manure application and at silage harvest for soil NO3‐N. Small grain growth stage was assessed 1 month after planting and at silage harvest, while dry matter (DM) yield and forage nutritive value parameters were assessed at silage harvest. Soil NO3‐N was elevated in‐band compared to between‐band 1 month after manure application (p < 0.05); however, this did not persist until silage harvest. No differences in growth stage were observed 1 month after planting in 2021; however, growth stage means were consistently elevated in‐band in 2022, likely due to earlier planting dates in 2022 compared to 2021. Growth stage at harvest was the same in‐band and between‐band at each site. Small grain DM yield was only increased in‐band compared to between‐band in three of 24 sites. Two of the three sites planted with wheat (Triticum aestivum L.) showed significantly increased DM yield in‐band, suggesting DM yield response could be species dependent. No consistent differences in forage nutritive value parameters were observed. As no consistent differences in small grain DM yield and forage nutritive value were found at harvest, we recommend no changes to management practices for producers utilizing fall manure injection in small grains.

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Nitrogen dynamics following slurry injection in maize: soil mineral nitrogen

Cited by 15 publications

References 43 publications

Fertilizer ammonium : nitrate ratios determine phosphorus uptake by young maize plants

Fertilizer ammonium : nitrate ratios determine phosphorus uptake by young maize plants

Effect of the nitrification inhibitor DMPP on nitrous oxide emissions and the stabilization of ammonium following the injection of dairy slurry and digestate in a soil‐column experiment

Does fall manure injection cause differential growth and forage nutritive value in small grains?

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