The effect of acidification of pig slurry digestate applied on winter rapeseed on the ammonia emission reduction

Abstract

The Agriculture is the main source of ammonia emissions. It generates around 75% of global emissions of ammonia to the atmosphere and soil fertilisation accounts for half of agricultural emissions. Ammonia emissions have a negative impact on ecosystems and human health, as it is able to accumulate both as solid particles and as an integral part of acid cases. Measures to reduce ammonia emissions can be divided into three large groups: the first group is ammonia-reducing measures in animal housing, the second group is ammonia-reducing measures during manure storage, and the third group is ammonia-reducing measures during the application of manure. Measurements of ammonia emissions were carried out in the parish of Jaunberze, which took place on 30 April and 1 May 2018. Sulphuric acid was used for acidification of pig slurry digestate. Picarro G2508 was used for on field measurement of ammonia concentrations with 1 second interval, a measurement time of one session was 400 seconds. The volume of the chamber was 60 l and was connected to the Picarro G2508 using a 10 m long Teflon tube. The measurement of ammonia emissions was with three repetitions for each measurement, with a reference error of less than 5%. Emissions were measured at different time intervals: immediately after digestate distribution, 2 hours, 4 hours and the 24 hours after digestate application. The emission of ammonia from digestate without vegetation after 24 hours was 13 kg ha−1, for acidified digestate without vegetation 8.5 kg ha −1, while the acidified digestate with vegetation within 24 hours reached 2.5 kg of ha −1 ammonia emissions, five times lower than that of non-vegetation.

Mitigating Ammonia, Methane, and Carbon Dioxide Emissions from Stored Pig Slurry Using Chemical and Biological Additives

“…The NH 3 emissions for the acidification decreased through the maintenance of a low and stable pH via the addition of sulfuric acid, due to the acid causing the ammoniumammonia (NH 4 + :NH 3 ) equilibrium in the slurry to shift towards non-volatile ammonium (NH 4 + ) [34]. The results of this study are similar to other results reported in other studies [59,60], where the acidification of pig slurry reduced NH 3 emissions by 70%, sometimes reaching up to 90%, according to Eihe [61]. Ammonia (NH 3 ) is a gas, and its volatility increases as the pH of the slurry increases (becomes more alkaline) [25,62].…”

The impact of crop on GHG emissions from clay soils: case study of Latvia

“…Firstly, research on GHG emission reduction measures and develops future os for GHG emissions in Latvia (Kreismane et al, 2016;Lēnerts et al, 2016 (Berzina et al, 018;Grinfelde et al, 2018;Jonova et al, 2018bJonova et al, , 2018aJonova, Ilgaza, & Grinfelde, 2017). Thirdly, field and ry studies are being carried out to analyse not only GHG emissions from soil, but also to determine the effect izers on GHG emissions (Eihe et al, 2019(Eihe et al, , 2020Frolova et al, 2017Grinfelde et al, 2019). Currently, a lack of understanding of the impact of cultivated crops on GHG emissions in heavy clay soils, which occupy the Zemgale region, where mainly wheat and rapeseed are grown.…”

“…The agricultural sector is an important source of nitric oxide (N<inf>2</inf>O. Secondly, experimental studies are carried out on farms where CH 4 measurements are carried out and solutions are sought to reduce CH 4 emissions in the livestock sector (Berzina et al, 2017(Berzina et al, , 2018Grinfelde et al, 2018;Jonova et al, 2018bJonova et al, , 2018aJonova, Ilgaza, & Grinfelde, 2017)to measure the amount of methane (CH4. Thirdly, field and laboratory studies are being carried out to analyse not only GHG emissions from soil, but also to determine the effect of fertilizers on GHG emissions (Eihe et al, 2019(Eihe et al, , 2020Frolova et al, 2017. Currently, there is a lack of understanding of the impact of cultivated crops on GHG emissions in heavy clay soils, which occupy most of the Zemgale region, where mainly wheat and rapeseed are grown.…”

Technical Solution for Monitoring Climatically Active Gases Using the Turbulent Pulsation Method

“…fractions down to parts per trillion. Commonly referred to as cavity ring laser absorption spectroscopy (CRLAS) [19], this method has found popularity among Latvian scientists engaged in researching carbon exchange in agricultural land [20][21][22][23][24]. The G2508 measures and records atmospheric gases.…”