Nitrous oxide, methane, and ammonia emissions from cattle excreta on Brachiaria decumbens growing in monoculture or silvopasture with Acacia mangium and Eucalyptus grandis

Effects of rumen undegradable protein sources on nitrous oxide, methane and ammonia emission from the manure of feedlot-finished cattle

“…The chambers were randomly placed above the manure (feces and urine) in the previously delimited areas. Quantification was performed according to the methodology of static chamber 69 , using semi-open chambers made of plastic bottles containing a foam soaked in 10 mL of 1.0 mol dm −3 H 2 SO 4 solution + glycerin 2% (v/v) to capture N. The amount of N-NH 3 retained in the foam was determined by distillation, following the Kjeldhal method (method 973.49) 61 and a correction factor of 1.74 was used 69 .…”

Recarbonizing global soils: A technical manual of recommended sustainable soil management

“…The use of Brachiaria species in silvopastures could also inhibit biological nitrification and reduce N2O emissions (Byrnes et al, 2017). NH3 volatilization could also be reduced in silvopastoral systems compared to treeless pastures where fertilizers are usually broadcast on the surface without incorporation into the ground (Bretas et al, 2020).…”

Seasonal changes in carbon and nitrogen metabolism of Brachiaria decumbens in a long‐term silvopastoral system

“…The experimental site where this study was conducted has been used in multidisciplinary studies since its establishment in November 1997 (Bretas et al, 2020;Paciullo et al, 2011Paciullo et al, , 2021Xavier et al, 2014). Evaluations were performed in the grove (intra-rows) of the SPS and the OP.…”

“…Throughout the experimental period, the plots were periodically harvested to maintain an herbage height of 35 cm ± 10 cm , and the plant cuttings were removed from the plots to simulate continuous grazing. One year before the experiment began, the experimental area was fenced to exclude animals and prevent any residual effect of excreta previously deposited on the soil (Bretas et al, 2020;Luo et al, 2019).…”

“…The silvopastoral system (SPS) has been considered a promising alternative for sustainable intensification management of land use (Jose & Dollinger, 2019;Paciullo et al, 2017). The potential benefits of the SPS have been described elsewhere and include improved soil fertility and carbon stock (Lopéz-Santiago et al, 2019), animal welfare and thermal comfort (Giro et al, 2019;Pezzopane et al, 2019), greenhouse gas emissions mitigation (Pontes et al, 2018) and reduced NH 3 losses (Bretas et al, 2020), as well as an increased content of forage crude protein (Carvalho et al, 2019;Neel & Belesky, 2017;Paciullo et al, 2021). In the SPS, the treetops intercept and reduce the photosynthetically active radiation (PAR) that reaches the understory, both with regard to the amount and quality of light (lower red: far-red ratio), and this impacts the metabolic processes and the pattern of photoassimilate allocation in the herbage, resulting in morphophysiological changes that promote the optimization of light capture and use (Gomes et al, 2019;Guenni et al, 2018).…”