Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies
Nitrogen (N) management affects herbage production and chemical composition; however, information on the impact of tropical herbage on N and carbohydrate fractions is scarce. A two-year study was conducted to investigate the potential use of pintoi peanut (<i>Arachis pintoi</i>) compared...
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| Format: | Article |
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MDPI AG
2021-04-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/5/847 |
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| author | Andressa S. Berça Abmael da S. Cardoso Vanessa Z. Longhini Luís O. Tedeschi Robert Michael Boddey Ricardo A. Reis Ana Cláudia Ruggieri |
| author_facet | Andressa S. Berça Abmael da S. Cardoso Vanessa Z. Longhini Luís O. Tedeschi Robert Michael Boddey Ricardo A. Reis Ana Cláudia Ruggieri |
| author_sort | Andressa S. Berça |
| collection | DOAJ |
| description | Nitrogen (N) management affects herbage production and chemical composition; however, information on the impact of tropical herbage on N and carbohydrate fractions is scarce. A two-year study was conducted to investigate the potential use of pintoi peanut (<i>Arachis pintoi</i>) compared with N fertilization of palisade grass (<i>Brachiaria</i><i>brizantha</i> cv. Marandu) by evaluating the herbage chemical composition (fractionation of protein and carbohydrate), herbage mass and accumulation rate, herbage disappearance rate, and stocking rate of pastures. The experiment was conducted in a completely randomized design with three treatments, and four replications (paddocks) were used with twenty-one non-lactating crossbred dairy heifers. Treatments consisted of pastures of palisade grass without a N source (control), fertilized with urea (150 kg/ha/year; fertilized), or mixed with pintoi peanut (mixed). Inclusion of the legume increased concentrations of fractions A (<i>p</i> = 0.009), which is the soluble N compound, and B3 (<i>p</i> < 0.001), which is slowly degraded true protein, compared with pastures fertilized with N and non-fertilized pastures. Nitrogen fertilization increased fraction B1 + B2 (<i>p</i> = 0.046), mainly true proteins, and decreased fraction C (<i>p</i> = 0.0007), indigestible protein, and neutral detergent fiber concentrations (<i>p</i> = 0.0003), contributing to increasing the nutritive value of the herbage. Additionally, N fertilization increased herbage mass (<i>p</i> = 0.004) and herbage allowance (<i>p</i> = 0.0001). Both N fertilization and biologically fixed N increased herbage allowance (<i>p</i> = 0.02) and accumulation rate (<i>p</i> = 0.02), as well as the crude protein content of herbage (<i>p</i> < 0.0001) compared with non-fertilized pastures. Nitrogen fertilization increased true protein and decreased indigestible protein of herbage and promoted a greater herbage mass production, while the inclusion of legumes increased soluble protein and decreased the slowly degraded true protein of herbage. Both N management strategies increased herbage allowance and accumulation rate. |
| first_indexed | 2024-03-10T11:57:16Z |
| format | Article |
| id | doaj.art-ace67d065abc44ecb81ea49a9a154f68 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T11:57:16Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-ace67d065abc44ecb81ea49a9a154f682023-11-21T17:15:51ZengMDPI AGAgronomy2073-43952021-04-0111584710.3390/agronomy11050847Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management StrategiesAndressa S. Berça0Abmael da S. Cardoso1Vanessa Z. Longhini2Luís O. Tedeschi3Robert Michael Boddey4Ricardo A. Reis5Ana Cláudia Ruggieri6Department of Animal Sciences, São Paulo State University, Jaboticabal, SP 14887-900, BrazilDepartment of Animal Sciences, São Paulo State University, Jaboticabal, SP 14887-900, BrazilDepartment of Animal Sciences, São Paulo State University, Jaboticabal, SP 14887-900, BrazilDepartment of Animal Science, Texas A&M University, College Station, TX 77843-2471, USAEmbrapa Agrobiologia, Seropedica, RJ 23891-000, BrazilDepartment of Animal Sciences, São Paulo State University, Jaboticabal, SP 14887-900, BrazilDepartment of Animal Sciences, São Paulo State University, Jaboticabal, SP 14887-900, BrazilNitrogen (N) management affects herbage production and chemical composition; however, information on the impact of tropical herbage on N and carbohydrate fractions is scarce. A two-year study was conducted to investigate the potential use of pintoi peanut (<i>Arachis pintoi</i>) compared with N fertilization of palisade grass (<i>Brachiaria</i><i>brizantha</i> cv. Marandu) by evaluating the herbage chemical composition (fractionation of protein and carbohydrate), herbage mass and accumulation rate, herbage disappearance rate, and stocking rate of pastures. The experiment was conducted in a completely randomized design with three treatments, and four replications (paddocks) were used with twenty-one non-lactating crossbred dairy heifers. Treatments consisted of pastures of palisade grass without a N source (control), fertilized with urea (150 kg/ha/year; fertilized), or mixed with pintoi peanut (mixed). Inclusion of the legume increased concentrations of fractions A (<i>p</i> = 0.009), which is the soluble N compound, and B3 (<i>p</i> < 0.001), which is slowly degraded true protein, compared with pastures fertilized with N and non-fertilized pastures. Nitrogen fertilization increased fraction B1 + B2 (<i>p</i> = 0.046), mainly true proteins, and decreased fraction C (<i>p</i> = 0.0007), indigestible protein, and neutral detergent fiber concentrations (<i>p</i> = 0.0003), contributing to increasing the nutritive value of the herbage. Additionally, N fertilization increased herbage mass (<i>p</i> = 0.004) and herbage allowance (<i>p</i> = 0.0001). Both N fertilization and biologically fixed N increased herbage allowance (<i>p</i> = 0.02) and accumulation rate (<i>p</i> = 0.02), as well as the crude protein content of herbage (<i>p</i> < 0.0001) compared with non-fertilized pastures. Nitrogen fertilization increased true protein and decreased indigestible protein of herbage and promoted a greater herbage mass production, while the inclusion of legumes increased soluble protein and decreased the slowly degraded true protein of herbage. Both N management strategies increased herbage allowance and accumulation rate.https://www.mdpi.com/2073-4395/11/5/847<i>Arachis pintoi</i>pintoi peanutherbage massmixed pastures<i>Brachiaria brizantha</i> |
| spellingShingle | Andressa S. Berça Abmael da S. Cardoso Vanessa Z. Longhini Luís O. Tedeschi Robert Michael Boddey Ricardo A. Reis Ana Cláudia Ruggieri Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies Agronomy <i>Arachis pintoi</i> pintoi peanut herbage mass mixed pastures <i>Brachiaria brizantha</i> |
| title | Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies |
| title_full | Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies |
| title_fullStr | Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies |
| title_full_unstemmed | Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies |
| title_short | Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies |
| title_sort | protein and carbohydrate fractions in warm season pastures effects of nitrogen management strategies |
| topic | <i>Arachis pintoi</i> pintoi peanut herbage mass mixed pastures <i>Brachiaria brizantha</i> |
| url | https://www.mdpi.com/2073-4395/11/5/847 |
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