Effects of DMPP [3,4-dimethylpyrozole phosphate] on the growth and chemical composition of ryegrass (Lolium perenne L.) raised on calcareous soil

Abstract

This paper reports a 406 day outdoor experiment (performed in pots) to determine the influence of the new nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP), when added to pig slurry (PS), on the growth and chemical composition of ryegrass. Pots containing a loamy, calcareous soil were treated with either no PS or 73.7, 147.3 or 221 cubic cm pot-1, with or without DMPP, prior to seeding with ryegrass. The greatest quantity of above ground dry matter was obtained with the highest dose of PS + DMPP (36.3 g pot-1) – 7.4% greater than that obtained for the same treatment without DMPP, and 46.1% greater than with the no PS treatment. The plants treated with the high and medium doses of PS + DMPP absorbed 70% of total N during the first quarter of the experimental season (104 days). Without DMPP, N uptakes were 55.7% and 63% for the high and medium treatments respectively. The inhibition of nitrification with DMPP increased agronomic efficiency and reduced N leaching by 17%.

A novel amended nitrification inhibitor confers an enhanced suppression role in the nitrification of ammonium in soil

“…Studies showed that nitrification inhibitors demonstrate different nitrification suppression effects in diverse soils (Chen et al 2008;Shi et al 2016a, b). As typical nitrification inhibitors, DMPP and DCD have been widely applied to improve nitrogen use efficiency, thus increasing crop yields (Pasda et al 2001;Guillaumes and Villar 2004;Fangueiro et al 2009;Wang et al 2016;Souza et al 2020;Wallace et al 2020). In this study, both the DMPP and DCD treatments significantly increased the accumulation of ammonium nitrogen and raised wheat or maize yields because of an increasing nitrogen use efficiency comparing to the control.…”

“…The components of N efficiency were determined by a previous method (Guillaumes and Villar 2004). For the pot experiment, nitrogen uptake (NUp) (g pot −1 ) representing total amounts of N in plant were estimated by using the N concentrations in grain and straw, while nitrogen utilization efficiency was determined by a formula of NUE (%) = N uptake fertilized crop / N applied × 100%, and apparent use efficiency of N fertilizer was estimated by a formula of AUN (%) = (N uptake fertilized crop − N uptake unfertilized crop ) / N applied × 100%.…”

Intensive Rain Hampers the Effectiveness of Nitrification Inhibition in Controlling N2O Emissions from Dairy Slurry-Fertilized Soils

“…The effect of the nitrification inhibitor DMPP is based on the delay of the oxidation of ammonium to nitrite (and subsequently to nitrate), by slowing down the activity of the chemoautotrophic bacteria of the genus Nitrosomonas spp. [47][48][49]. Both DMPP and DCD, as well as other NIs including Nitrapyrin and 3,4-dimethylpyrazole succinic (DMPSA), slow down the oxidation of NH 4 + to NO 2 − by inhibiting the activity of the enzyme ammonia monooxygenase (AMO) [41,50].…”