Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches

High nitrogen (N) concentration in bovine urine, which generally exceeds plant N uptake rates, results in the formation of hotspots of N loss when bovine urine is deposited on grazed pasture soils. High spatial variability in the distribution of urine patches in grazed pastures poses a major challen...

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Autores principales: Byrnes, Ryan C., Nùñez, Jonathan, Arenas Calle, Laura N., Rao, Idupulapati M., Trujillo, Catalina, Álvarez, Carolina, Arango, Jacobo, Rasche, Frank, Chirinda, Ngonidzashe
Formato: Conjunto de datos
Lenguaje:Inglés
Publicado: International Center for Tropical Agriculture 2017
Materias:
Acceso en línea:https://hdl.handle.net/10568/80921
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author Byrnes, Ryan C.
Nùñez, Jonathan
Arenas Calle, Laura N.
Rao, Idupulapati M.
Trujillo, Catalina
Álvarez, Carolina
Arango, Jacobo
Rasche, Frank
Chirinda, Ngonidzashe
author_browse Arango, Jacobo
Arenas Calle, Laura N.
Byrnes, Ryan C.
Chirinda, Ngonidzashe
Nùñez, Jonathan
Rao, Idupulapati M.
Rasche, Frank
Trujillo, Catalina
Álvarez, Carolina
author_facet Byrnes, Ryan C.
Nùñez, Jonathan
Arenas Calle, Laura N.
Rao, Idupulapati M.
Trujillo, Catalina
Álvarez, Carolina
Arango, Jacobo
Rasche, Frank
Chirinda, Ngonidzashe
author_sort Byrnes, Ryan C.
collection Repository of Agricultural Research Outputs (CGSpace)
description High nitrogen (N) concentration in bovine urine, which generally exceeds plant N uptake rates, results in the formation of hotspots of N loss when bovine urine is deposited on grazed pasture soils. High spatial variability in the distribution of urine patches in grazed pastures poses a major challenge to mitigate N losses. Some exudates from the roots of several tropical forage grasses were shown to inhibit the activity of soil nitrifiers; a process known as biological nitrification inhibition (BNI). We hypothesized that nitrate (NO3−) production and nitrous oxide (N2O) emissions from urine patches deposited on soils under forage grasses with high BNI capacity are lower than those with forage grasses with low BNI capacity. This hypothesis was tested using field plots of two tropical forage grass cultivars, Brachiaria humidicola cv. Tully (BT) and interspecific Brachiaria hybrid cv. Mulato (BM) which, correspondingly, have high and low BNI capacity. Nitrification rates and amoA gene copy numbers of ammonia oxidizing archaea (AOA) and bacteria (AOB) in soils under the two forage grasses were quantified before and after urine and water (control) application, as well, an additional experiment was conducted to quantify denitrification potential. Moreover, soil N2O emissions from simulated urine (0.123 kg N m−2) and water patches were monitored over a 29-day period. Results showed a greater suppression of nitrification, denitrification and AOA abundance in soils under BT than those under BM. Positive relationships (p < 0.05) existed between AOA and AOB abundance and NO3− contents in soils under BM. Bovine urine resulted in higher cumulative N2O fluxes from soils under BM (80 mg N2O-N m−2) compared to those under BT (32 mg N2O-N m−2). Consequently, N2O emission factors were higher for soils under BM (0.07%) than under BT (0.00002%). We conclude that tropical forage grasses with high BNI capacity play a key role in mitigating N2O emissions from bovine urine patches in archaea-dominated soils. This suggests that wide-spread adoption of tropical forage grasses with high BNI capacity may have a great potential to tighten N cycling in grazed pastures.
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spelling CGSpace809212025-03-13T09:45:17Z Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches Byrnes, Ryan C. Nùñez, Jonathan Arenas Calle, Laura N. Rao, Idupulapati M. Trujillo, Catalina Álvarez, Carolina Arango, Jacobo Rasche, Frank Chirinda, Ngonidzashe biological nitrification inhibition bovine urine patches brachiaria humidicola n2o emission factor archaea ammonia oxidizing bacteria High nitrogen (N) concentration in bovine urine, which generally exceeds plant N uptake rates, results in the formation of hotspots of N loss when bovine urine is deposited on grazed pasture soils. High spatial variability in the distribution of urine patches in grazed pastures poses a major challenge to mitigate N losses. Some exudates from the roots of several tropical forage grasses were shown to inhibit the activity of soil nitrifiers; a process known as biological nitrification inhibition (BNI). We hypothesized that nitrate (NO3−) production and nitrous oxide (N2O) emissions from urine patches deposited on soils under forage grasses with high BNI capacity are lower than those with forage grasses with low BNI capacity. This hypothesis was tested using field plots of two tropical forage grass cultivars, Brachiaria humidicola cv. Tully (BT) and interspecific Brachiaria hybrid cv. Mulato (BM) which, correspondingly, have high and low BNI capacity. Nitrification rates and amoA gene copy numbers of ammonia oxidizing archaea (AOA) and bacteria (AOB) in soils under the two forage grasses were quantified before and after urine and water (control) application, as well, an additional experiment was conducted to quantify denitrification potential. Moreover, soil N2O emissions from simulated urine (0.123 kg N m−2) and water patches were monitored over a 29-day period. Results showed a greater suppression of nitrification, denitrification and AOA abundance in soils under BT than those under BM. Positive relationships (p < 0.05) existed between AOA and AOB abundance and NO3− contents in soils under BM. Bovine urine resulted in higher cumulative N2O fluxes from soils under BM (80 mg N2O-N m−2) compared to those under BT (32 mg N2O-N m−2). Consequently, N2O emission factors were higher for soils under BM (0.07%) than under BT (0.00002%). We conclude that tropical forage grasses with high BNI capacity play a key role in mitigating N2O emissions from bovine urine patches in archaea-dominated soils. This suggests that wide-spread adoption of tropical forage grasses with high BNI capacity may have a great potential to tighten N cycling in grazed pastures. 2017-05-08 2017-05-08T20:07:57Z 2017-05-08T20:07:57Z Dataset https://hdl.handle.net/10568/80921 en https://doi.org/10.1016/j.soilbio.2016.12.029 Open Access International Center for Tropical Agriculture Byrnes, Ryan C.; Nùñez, Jonathan; Arenas, Laura; Rao, Idupulapati; Trujillo, Catalina; Alvarez, Carolina; Arango, Jacobo; Rasche, Frank; Chirinda, Ngonidzashe, 2017, "Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches", doi:10.7910/DVN/FVX1VR, Harvard Dataverse, V1, UNF:6:O7ueLsm0HN70OrfSHYgJJw==
spellingShingle biological nitrification inhibition
bovine urine patches
brachiaria humidicola
n2o emission factor
archaea
ammonia oxidizing bacteria
Byrnes, Ryan C.
Nùñez, Jonathan
Arenas Calle, Laura N.
Rao, Idupulapati M.
Trujillo, Catalina
Álvarez, Carolina
Arango, Jacobo
Rasche, Frank
Chirinda, Ngonidzashe
Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches
title Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches
title_full Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches
title_fullStr Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches
title_full_unstemmed Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches
title_short Replication Data for:Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches
title_sort replication data for biological nitrification inhibition by brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches
topic biological nitrification inhibition
bovine urine patches
brachiaria humidicola
n2o emission factor
archaea
ammonia oxidizing bacteria
url https://hdl.handle.net/10568/80921
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