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...
| Main Authors: | , , , , , , , , |
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
Elsevier
2024
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/19383 https://www.sciencedirect.com/science/article/pii/S003807171630270X https://doi.org/10.1016/j.soilbio.2016.12.029 |
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| author | Byrnes, Ryan C. Nùñez, Jonathan Arenas, Laura Rao, Idupulapati Trujillo, Catalina Alvarez, Carolina Arango, Jacobo Rasche, Frank Chirinda, Ngonidzashe |
| author_browse | Alvarez, Carolina Arango, Jacobo Arenas, Laura Byrnes, Ryan C. Chirinda, Ngonidzashe Nùñez, Jonathan Rao, Idupulapati Rasche, Frank Trujillo, Catalina |
| author_facet | Byrnes, Ryan C. Nùñez, Jonathan Arenas, Laura Rao, Idupulapati Trujillo, Catalina Alvarez, Carolina Arango, Jacobo Rasche, Frank Chirinda, Ngonidzashe |
| author_sort | Byrnes, Ryan C. |
| collection | INTA Digital |
| 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 m2) 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 m2) compared to those under BT (32 mg N2O-N m2). 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. |
| format | Artículo |
| id | INTA19383 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA193832024-09-13T11:55:34Z Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches Byrnes, Ryan C. Nùñez, Jonathan Arenas, Laura Rao, Idupulapati Trujillo, Catalina Alvarez, Carolina Arango, Jacobo Rasche, Frank Chirinda, Ngonidzashe Producción Animal Nitrógeno Nítrico Gramíneas Forrajeras Animal Production Nitrate-nitrogen Feed Grasses Nitrous Oxide Brachiaria Óxido Nitroso Inhibición Biológica Brachiaria cv. Mulato Biological Inhibition 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 m2) 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 m2) compared to those under BT (32 mg N2O-N m2). 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. EEA Manfredi Fil: Byrnes, Ryan C. Centro Internacional de Agricultura Tropical (CIAT); Colombia Fil: Byrnes, Ryan C. University of California. Department of Land, Air and Water Resources. One Shields Avenue; Estados Unidos Fil: Nùñez, Jonathan. Centro Internacional de Agricultura Tropical (CIAT); Colombia Fil: Arenas, Laura. Centro Internacional de Agricultura Tropical (CIAT); Colombia Fil: Rao, Idupulapati. Centro Internacional de Agricultura Tropical (CIAT); Colombia Fil: Trujillo, Catalina. Centro Internacional de Agricultura Tropical (CIAT); Colombia Fil: Alvarez, Carolina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina Fil: Arango, Jacobo. Centro Internacional de Agricultura Tropical (CIAT); Colombia Fil: Rasche, Frank. University of Hohenheim. Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute); Alemania Fil: Chirinda, Ngonidzashe. Centro Internacional de Agricultura Tropical (CIAT); Colombia 2024-09-13T11:42:48Z 2024-09-13T11:42:48Z 2017 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/19383 https://www.sciencedirect.com/science/article/pii/S003807171630270X 1879-3428 (On line) 0038-0717 https://doi.org/10.1016/j.soilbio.2016.12.029 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Elsevier Soil Biology & Biochemistry 107 : 156-163 (April 2017) |
| spellingShingle | Producción Animal Nitrógeno Nítrico Gramíneas Forrajeras Animal Production Nitrate-nitrogen Feed Grasses Nitrous Oxide Brachiaria Óxido Nitroso Inhibición Biológica Brachiaria cv. Mulato Biological Inhibition Byrnes, Ryan C. Nùñez, Jonathan Arenas, Laura Rao, Idupulapati Trujillo, Catalina Alvarez, Carolina Arango, Jacobo Rasche, Frank Chirinda, Ngonidzashe Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches |
| title | Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches |
| title_full | Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches |
| title_fullStr | Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches |
| title_full_unstemmed | Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches |
| title_short | Biological nitrification inhibition by Brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches |
| title_sort | biological nitrification inhibition by brachiaria grasses mitigates soil nitrous oxide emissions from bovine urine patches |
| topic | Producción Animal Nitrógeno Nítrico Gramíneas Forrajeras Animal Production Nitrate-nitrogen Feed Grasses Nitrous Oxide Brachiaria Óxido Nitroso Inhibición Biológica Brachiaria cv. Mulato Biological Inhibition |
| url | http://hdl.handle.net/20.500.12123/19383 https://www.sciencedirect.com/science/article/pii/S003807171630270X https://doi.org/10.1016/j.soilbio.2016.12.029 |
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