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Magnani E, Silva TH, Sakamoto L, Manella MQ, Dias FMGN, Mercadante ME, Henry D, Marcatto JOS, Paula EM, Branco RH. Tannin-based product in feedlot diet as a strategy to reduce enteric methane emissions of Nellore cattle finished under tropical conditions. Transl Anim Sci 2023; 7:txad048. [PMID: 37256191 PMCID: PMC10226682 DOI: 10.1093/tas/txad048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 05/09/2023] [Indexed: 06/01/2023] Open
Abstract
A total of 120 Nellore bulls, [initial body weight (BW) = 307 ± 11.6 kg and 12 mo of age] were allocated into 12 collective pens (10 bulls per pen) in a commercial feedlot to evaluate the effects of a specific blend of tannin and saponins on enteric methane (CH4) emissions. The study was a completely randomized design, in which pens were considered the experimental units (N = 6 pens per treatment) and were randomly allocated into one of two treatments: 1) Control (CON), a basal diet with monensin supplementation (25 mg/kg dry matter [DM]; Rumensin, Elanco Animal Health, Greenfield, IN, USA), or 2) Control + a specific blend of tannin and saponins (TAN; 7 g/kg DM; composed of quebracho and chestnut tannin extracts along with carriers from cereals rich in saponins; SilvaFeed BX, Silvateam, San Michele Mondovi, CN, Italy). After the adaptation period (20 d), the experiment was divided into two phases: growing phase (21 to 53 d; total of 33 d) and fattening phase (54 to 139 d; total of 86 d). Enteric methane emissions were estimated using the sulfur hexafluoride (SF6) tracer gas technique. Interactions between treatment and period (growing vs. fattening) were detected for daily CH4 emissions, in which animals fed TAN reduced CH4 emissions by 17.3% during the fattening period compared to bulls fed CON (P = 0.05). In addition, bulls fed TAN had lower CH4 emissions expressed by dry matter intake (DMI) during the fattening period compared to bulls fed CON (P = 0.06). The findings presented herein indicate that a specific blend of tannin and saponins can be used as a strategy to reduce enteric CH4 emissions and its intensity of Nellore bulls finished in feedlot systems under tropical conditions.
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Affiliation(s)
- Elaine Magnani
- Institute of Animal Science, Beef Cattle Research Center, Sertãozinho, SP 14160-970, Brazil
| | - Thiago H Silva
- Institute of Animal Science, Beef Cattle Research Center, Sertãozinho, SP 14160-970, Brazil
| | - Leandro Sakamoto
- Institute of Animal Science, Beef Cattle Research Center, Sertãozinho, SP 14160-970, Brazil
| | - Marcelo Q Manella
- Division of Research and Development, Silva Team Brasil, Estância Velha, RS 93600-000, Brazil
| | - Fabio M G N Dias
- Division of Research and Development, JBS Friboi, São Paulo, SP 05118-100, Brazil
| | - Maria E Mercadante
- Institute of Animal Science, Beef Cattle Research Center, Sertãozinho, SP 14160-970, Brazil
| | - Darren Henry
- Department of Animal and Dairy Sciences, University of Georgia, Tifton, GA 31793-89557, USA
| | - Juliana O S Marcatto
- Department of Global Climate Change and Agriculture, Embrapa Environment, Jaguariuna, SP 13820, Brazil
| | - Eduardo M Paula
- Institute of Animal Science, Beef Cattle Research Center, Sertãozinho, SP 14160-970, Brazil
| | - Renata H Branco
- Institute of Animal Science, Beef Cattle Research Center, Sertãozinho, SP 14160-970, Brazil
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Sakamoto L, Mehr E. A New Method of Stair Markings for Visually Impaired People. Journal of Visual Impairment & Blindness 1988. [DOI: 10.1177/0145482x8808200109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Falls on stairs are a major hazard for elderly persons who are visually impaired. Stair marking is critical in making travel on stairs safe. Two groups of subjects with distinctly different visual impairments—group 1 having cataracts with healthy maculas; group 2 having age-related maculopathy with very little or no cataract development—were assessed to determine preference between two methods of marking stairways. Subjects were exposed to two identical stairways, one marked with traditional horizontal contrasting stripes, the other with a new method of three vertical stripes. Findings show that the newer method was preferred, with group 2 having a higher preference rate than group 1.
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Affiliation(s)
- L. Sakamoto
- Private practice in optometry, 7678 Willow Point Drive, Falls Church, VA 22042
| | - E.B. Mehr
- Western Blind Rehabilitation Center, Veterans Administration, 3801 Miranda Avenue, Palo Alto, CA 94304
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