Abstract Nitrification is a major process within the nitrogen (N) cycle leading to global losses of N, including fertiliser from natural and agricultural systems producing significant nitrous oxide emissions. One strategy for mitigation these involves nitrification inhibition by plant-derived biological inhibitors (BNIs). Cultivation-based studies BNIs, screening new compounds, have predominant...

The differences in rhizosphere nitrification activities between high- and low- fertility soils appear to be related to differences in dissolved oxygen concentrations in the soil, implying a relationship to differences in the radial oxygen loss (ROL) of rice roots in these soils. A miniaturised Clark-type oxygen microelectrode system was used to determine rice root ROL and the rhizosphere oxygen...

Abstract Existing studies suggest that biochar application can reduce soil nitrous oxide (N 2 O) emissions, mainly based on short‐term results. However, it remains unclear what the effects (i.e., legacy effects) and underlying mechanisms are N O emissions after many years of a single biochar. Here, we collected intact columns from plots without with in subtropical tea plantation 7 ago for an in...

Surficial oxygen transfer plays an important role, when analyzing the complex biochemical and physical processes responsible for ammonia and dinitrogen gas emission in animal waste treatment lagoons. This paper analyzes if currently known nitrogen biochemical pathways can explain the enigmatic dinitrogen gas emissions recently observed from the treatment lagoons, based on the amount of wind-dri...

Interruptions in three nitrate reductase-related genes, narH, narJ, and moaE, inhibited heterotrophic nitrification in Pseudomonas strain M19. No nitrate was detected in the medium, and nitrification proceeded in the presence of a nitrate reductase inhibitor. Heterotrophic nitrification was greatly stimulated by the addition of nitrate.

Abstract Grasslands are the largest contributor of nitrous oxide (N 2 O) emissions in agriculture sector due to livestock excreta and nitrogen fertilizers applied soil. Nitrification inhibitors (NIs) added N input have reduced O emissions, but can show a range efficiencies depending on climate, soil, management conditions. A meta-analysis study was conducted investigate factors that influence e...

Subtropical ecosystems are often characterized by high N cycling rates, but net nitrification rates are often low in subtropical acid soils. NO3(-)-N immobilization into organic N may be a contributing factor to understand the observed low net nitrification rates in these acid soils. The effects of Fe oxide and organic matter on soil N transformations were evaluated using a (15)N tracing study....

Nitrification inhibitors (NI) are aimed at improving N-fertilizer use efficiency in cropping systems. This study to assess the nitrification inhibition potential and non-target effects of dry leaf powders (botanicals) ten plant species [neem (Azadirachta indica), lantana (Lantana camara), karanda (Pongamia pinnata), Brachiaria humidicola, cinnamon (Cinnamomum verum), clove (Syzygium aromaticum)...