Does Brachiaria humidicola and dicyandiamide reduce nitrous oxide and ammonia emissions from cattle urine patches in the subtropics?

Simon, Priscila Luzia; Dieckow, Jeferson; Zanatta, Josiléia Acordi; Ramalho, Bruna; Ribeiro, Ricardo Henrique; Weerden, Tony J. van der; Klein, Cecile A. M. de

doi:10.1016/j.scitotenv.2020.137692

Cited by 21 publications

(11 citation statements)

References 53 publications

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“…There are several commercial cultivars of M. maximus, almost all with tufted growth habit (Jank et al, 2011). They need frequent management interventions (Jank et al, 2011;Santos et al, 2012) and demand high fertility environments, without N limitations, what may result in low BNI capacity (Subbarao et al, 2007(Subbarao et al, , 2009Simon et al, 2020) and subsequent higher N 2 O emissions than Urochloa (Subbarao et al, 2007). Simon et al (2020) found 20% greater N 2 O emissions from cattle urine over M. maximus pastures, compared to that in pastures of U. humidicola.…”

Section: Urochloa In Tropical and Subtropical Conservation Agriculturementioning

confidence: 99%

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Urochloa in Tropical Agroecosystems

Baptistella¹,

Andrade

Favarin³

et al. 2020

Front. Sustain. Food Syst.

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Increasing biodiversity is an important issue in more secure and sustainable agriculture. Diversified systems are more resilient to climate change, environmental stresses and enhance soil health, nutrient cycling and nutrient use efficiency. In tropical agroecosystems, cover crops and intercrops are an alternative toward a more diverse and sustainable production. Urochloa spp. (syn. Brachiaria spp.) are perennial grasses, known for their high biomass production. They are commonly used as cover and companion crops in conservation agriculture in the tropics and the residues left in the field after cutting protect the soil and provide nutrient to the next crop cycle or intercropped culture. Urochloa species roots are vigorous, abundant and deep, as opposed to the more shallow and scarce roots of common crops. These traits contribute to carbon sequestration, soil organic matter stabilization and nutrient cycling. Urochloa roots also improve soil physical characteristics and influence soil nutrient dynamics, reducing nutrient losses and enhancing cycling, what is key to achieve greater nutrient use efficiency in agriculture. For instance, Urochloa root exudates can reduce nitrogen losses by denitrification and leaching through a process called biological nitrification inhibition; root exudates can mobilize recalcitrant phosphorus from soils and make it available for plant uptake; the deep roots of these grasses have the potential to recover nutrients that are virtually lost away from the root zone of other crops. This review compiles scientific progress regarding the introduction of Urochloa in agroecosystems, mainly on the aspects related to the contribution to more secure and sustainable agriculture.

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Section: Urochloa In Tropical and Subtropical Conservation Agriculturementioning

confidence: 99%

“…Some genotypes of U. humidicola possess high BNI capacity and can reduce the emission of N 2 O (Subbarao et al, 2009). On this regard, it has been shown that U. humidicola significantly reduced N 2 O emissions from cattle urine residues in soils (Byrnes et al, 2017;Simon et al, 2020).…”

Section: Biological Nitrification Inhibitionmentioning

confidence: 99%

Urochloa in Tropical Agroecosystems

Baptistella¹,

Andrade

Favarin³

et al. 2020

Front. Sustain. Food Syst.

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“…La capacidad de Brachiaria humidicola cv. CIAT679 para mostrar menores emisiones de N 2 O, probablemente se relacionan con la liberación de metabolitos secundarios a la rizosfera (braquialactonas), que afectan la actividad microbial y los procesos de nitrificación y desnitrificación en el suelo (Pastrana et al 2011, Byrnes et al 2017, Simon et al 2020, Nakamura et al 2020.…”

Section: Discussionunclassified

Flujos de óxido nitroso en pasturas bajo diferentes dosis de fertilización nitrogenada, norte de Colombia

Santos

Carvajal

Torres

et al. 2022

RAC

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Introducción. El óxido nitroso es un gas de efecto invernadero de gran impacto sobre el calentamiento global. En los sistemas de producción ganaderos es de gran importancia buscar alternativas que permitan mitigar las emisiones de N2O, dentro de las cuales se ha considerado el uso de coberturas vegetales capaces de reducir el proceso de nitrificación. Objetivo. Evaluar la dinámica de los flujos de N2O en suelos bajo ocupación ganadera cubiertos con gramíneas mejoradas y fertilización nitrogenada (Úrea). Materiales y métodos. Esta investigación se desarrolló en un sistema de producción de carne en el valle medio del Rio Sinú, en el cual los flujos de N2O fueron monitoreados durante un periodo de 12 meses (noviembre 2014 - 2015). Se utilizó un diseño experimental de bloques completos al azar, en arreglo de parcelas divididas y 2 repeticiones, en donde la parcela principal correspondió a las gramíneas (Brachiaria humidicola CIAT679 y Panicum maximum cv. Tanzania) y suelo descubierto, y las subparcelas a 3 dosis de fertilización nitrogenada (0, 150, 300 kg.ha-1.año-1 N). Resultados. Los flujos de N2O fluctuaron según el contenido de humedad del suelo, asociado a los periodos de mayor o menor precipitación en la región. La cobertura con la gramínea Brachiaria humidicola cv CIAT679 mostró menores emisiones de N2O, mientras que las dosis de fertilizantes nitrogenados aumentaron las emisiones de N2O. Dichos efectos fueron en parte atenuados por el uso de la cobertura con Brachiaria humidicola CIAT679. Conclusiones. Los resultados obtenidos indican que las emisiones de óxido nitroso en los sistemas ganaderos podrían variar a partir del tipo de cobertura y las dosis de fertilización nitrogenada utilizadas. En este caso, se encontró que la cobertura con Brachiaria humidicola cv CIAT679 en los sistemas de producción ganaderos reduce en más del 40%las emisiones de óxido nitroso hasta una dosis de N máxima de 300 kg.ha-1.año-1

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“…Additionally, more efficient utilization of available N can have multiple mitigation benefits, inclusive of fewer field operations, lower fertilizer inputs, and lower soil-atmosphere N 2 O flux, though the efficacy of the latter requires efficient N cycling and maintenance of aerobic soil conditions (Eckard et al 2003). Moreover, use of nitrification inhibitors to reduce N 2 O flux from ammonia-based fertilizers and urine patches shows promise for improving N use efficiency (Di and Cameron 2002) as does certain forage species with biological nitrification inhibition capacity (Simon et al 2020), but evaluations in semiarid cropping systems are lacking. Finally, numerous opportunities exist to reduce enteric fermentation emissions from ruminant livestock in grazed cropping systems, though some options have proven more effective and economically viable than others (e.g., culling unproductive animals and improving diet quality vs. supplementing forage with plant secondary compound or manipulating rumen microbial populations) (Eckard et al 2010).…”

Section: Managing Ghg Sourcesmentioning

confidence: 99%

Integrating beef cattle on cropland affects net global warming potential

Liebig

Faust

Archer

et al. 2021

Nutr Cycl Agroecosyst

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Recent interest in integrated crop-livestock (ICL) systems has prompted numerous investigations to quantify ecosystem service tradeoffs associated with management. However, few investigations have quantified ICL management effects on net global warming potential (GWP), particularly in semiarid regions. Therefore, we determined net GWP for grazed and ungrazed cropland in a long-term ICL study near Mandan, ND USA. Factors evaluated for their contribution to net GWP included carbon dioxide (CO2) emissions associated with production inputs and field operations, methane (CH4) emissions from enteric fermentation by beef cattle, change in soil carbon stocks, and soil-atmosphere CH4 and nitrous oxide (N2O) fluxes. Net GWP was significantly greater for grazed cropland (946 kg CO2equiv. ha-1 yr-1) compared to ungrazed cropland (200 kg CO2equiv. ha-1 yr-1) (P=0.0331). The difference in net GWP between treatments was largely driven by emissions from enteric fermentation (602 kg CO2equiv. ha-1 yr-1). Among other contributing factors, CO2 emissions associated with seed production and field operations were lower under ungrazed cropland (P = 0.0015 and 0.0135, respectively), while soil CH4 uptake was greater under grazed cropland (P = 0.0102). Soil-atmosphere N2O flux from each system negated nearly all the CO2equiv. sink capacity accrued from soil carbon stock change. As both production systems resulted in net greenhouse gas (GHG) emissions to the atmosphere, novel practices that constrain GHG sources and boost GHG sinks under semiarid conditions are recommended.

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Does Brachiaria humidicola and dicyandiamide reduce nitrous oxide and ammonia emissions from cattle urine patches in the subtropics?

Cited by 21 publications

References 53 publications

Urochloa in Tropical Agroecosystems

Urochloa in Tropical Agroecosystems

Flujos de óxido nitroso en pasturas bajo diferentes dosis de fertilización nitrogenada, norte de Colombia

Integrating beef cattle on cropland affects net global warming potential

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