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.

中文翻译：

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硝化抑制剂DMPP对土壤柱试验中注入奶浆和消化液后一氧化二氮排放和氨稳定的影响

在玉米种子下注入泥浆或消化液是一种相对较新的技术，旨在提高氮的利用效率。但是，这种做法的主要缺点是增加了一氧化二氮（N ₂ O）的排放。硝化抑制剂（NI）的应用是减少这些排放的有效方法。评估NI 3,4-二甲基吡唑磷酸酯（DMPP）对N _2的影响进行了O排放和铵稳定化的两因素土壤柱实验。PVC管（直径20厘米，长度30厘米）用作土壤柱的培养容器。该试验包括随机区组设计中的四种治疗方法，并进行四次重复：浆液注射，浆液注射+ DMPP，消化液注射和消化液注射+ DMPP。在47天的潜伏期中，N ₂每周两次测量O流量，并通过对连续测量日期的气体流量进行线性插值来累计。气体通量测量完成后，确定土壤柱中铵和硝酸盐的浓度。DMPP显着延迟了肥料注入区内铵的转化。在处理消化液+ NI中，此效果比在处理浆液+ NI中更为明显。关于累积的N ₂ O排放，未确定浆料处理和消化处理之间的差异。DMPP显着降低了N ₂ O的释放。为了将结果付诸实践，DMPP的使用是减少注浆或消化后温室气体排放和硝酸盐淋失的一种有前途的方法。