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- W4377157642 abstract "Abstract The effect of slurry application techniques and slurry N stabilizing strategies on nitrous oxide emission from grasslands is poorly understood and, therefore, can result in large uncertainties in national/regional inventories. Field experiments were, thus, conducted to estimate the effect of different fertilization techniques on nitrous oxide (N 2 O) emissions. Fertilizer was applied (135–270 kg N ha −1 year −1 ) as calcium ammonium nitrate (CAN), untreated or treated cattle slurry. The slurry was either treated with sulfuric acid (target pH = 6.0), applied using trailing shoes or treated with 3,4‐dimethyl pyrazole phosphate and applied via slot injection. N 2 O fluxes were sampled using the closed chamber technique. Cumulative N 2 O emissions ranged 0.1–2.9 kg N ha −1 year −1 across the treatment, sites and years. The N application techniques showed inconsistent effects on soil mineral N content, cumulative N 2 O emission and N yield. The fertilizer replacement value of slurry was low due to low N use efficiencies at the sites. However, a close positive relationship ( r = 0.5; p = .013) between slurry value and biomass yield was observed, highlighting the benefit of high slurry value on crop productivity. N 2 O‐N emission factors were low for all treatments, including CAN, but were 2–6 times higher in 2019 than in 2020 due to lower precipitation in 2020. Variations in N 2 O emission were largely explained by soil and climatic factors. Even with the low N 2 O emissions, this study highlights the benefit (significant mitigation of N 2 O emissions) of replacing the increasingly expensive chemical fertilizer N with input from slurry under favourable conditions for denitrification." @default.
- W4377157642 created "2023-05-21" @default.
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- W4377157642 date "2023-05-20" @default.
- W4377157642 modified "2023-10-17" @default.
- W4377157642 title "Effect of slurry application techniques on nitrous oxide emission from temperate grassland under varying soil and climatic conditions" @default.
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