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

Author(s)

Coelho, Larissa de Melo ; Brito, Liziane de Figueiredo ; Messana, Juliana Duarte ; Cardoso, Abmael da Silva ; Carvalho, Geovany Macedo ; Santos Torres, Rodrigo de Nazare ; Carlos, Roberta Souto ; Malheiros, Euclides Braga ; Pessoa da Cruz, Mara Cristina ; Berchielli, Telma Teresinha

• Document type: Journal article
• Source: SCIENTIFIC REPORTS; v. 12, n. 1, p. 15-pg., 2022-06-02.

Abstract

The effects of sources of rumen undegradable protein (RUP) in diets on methane (CH4), nitrous oxide (N2O) and ammonia (NH3) emissions from the manure of feedlot-finished cattle were evaluated. We hypothesized that the use of different RUP sources in diets would reduce N loss via urine and contribute to reduced N2O, CH4 and NH3 emissions to the environment. Nellore cattle received different diets (18 animals/treatment), including soybean meal (SM, RDP source), by-pass soybean meal (BSM, RUP source) and corn gluten meal (CGM, RUP source). The protein source did not affect the N and C concentration in urine, C concentration in feces, and N balance (P > 0.05). The RUP sources resulted in a higher N2O emission than the RDP source (P = 0.030), while BSM resulted in a higher N2O emission than CGM (P = 0.038) (SM = 633, BSM = 2521, and CGM = 1153 g ha(-2) N-N2O); however, there were no differences in CH4 and NH3 emission (P > 0.05). In conclusion, the use of RUP in diets did not affect N excretion of beef cattle or CH4 and NH3 emission from manure, but increased N2O emission from the manure. (AU)

• FAPESP's process: 17/11274-5 - Decomposition of litter and greenhouse gases emission in Brachiaria grasses with increasing nitrogen fertilizer rates
• Grantee: Abmael da Silva Cardoso
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 16/22022-4 - Impact of metabolizable protein in the production of beef cattle and emission of greenhouse gases
• Grantee: Telma Teresinha Berchielli
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/11864-2 - Emission of greenhouse gases in bovine excreta supplemented with rumen undegradable protein in confinement
• Grantee: Larissa de Melo Coelho
• Support Opportunities: Scholarships in Brazil - Master