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      Forage sources in diets for dairy goats

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          Abstract

          ABSTRACT. The objective of this study was to evaluate the use of sorghum silage, Buffel grass hay and forage palm fodder in the diet of dairy goats by means of performance tests and economic viability of different roughage sources. Eight Anglo-Nubian goats, multiparous, weighing around 40.13 ± 2.76 kg of live weight were used. The experiment lasted 84 days, consisting of four periods of 21 days, distributed in two Latin squares (4x4). The treatments represented by diets with different volumetric sources: SSCF: (sorghum silage+ forage palm+ concentrate); BHCF: (Buffel grass hay + cactus forage+ concentrate); SS: (sorghum silage+ concentrate) and BH: (Buffel grass hay + concentrate). Nutritional intake, digestibility, feed behavior, milk production and chemical composition and economic analysis were evaluated. Animals fed the BHCF diet had higher nutrient intakes and consequently were more productive in fat, protein, lactose, fat free solids and total solids. The BHCF diet led to a higher gross income in Brazilian currency. The safety margin of the SSCF diet presented the highest percentage, with 43.06%, and the BHCF diet, the lowest percentage, of 14.89. The association of forage palm with sorghum silage and Buffel grass hay can be used as a bulky source in lactating goat diets.

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          Prediction of the energy value of cow's milk.

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            A net carbohydrate and protein system for evaluating cattle diets: II. Carbohydrate and protein availability.

            The Cornell Net Carbohydrate and Protein System (CNCPS) has a submodel that predicts rates of feedstuff degradation in the rumen, the passage of undegraded feed to the lower gut, and the amount of ME and protein that is available to the animal. In the CNCPS, structural carbohydrate (SC) and nonstructural carbohydrate (NSC) are estimated from sequential NDF analyses of the feed. Data from the literature are used to predict fractional rates of SC and NSC degradation. Crude protein is partitioned into five fractions. Fraction A is NPN, which is trichloroacetic (TCA) acid-soluble N. Unavailable or protein bound to cell wall (Fraction C) is derived from acid detergent insoluble nitrogen (ADIP), and slowly degraded true protein (Fraction B3) is neutral detergent insoluble nitrogen (NDIP) minus Fraction C. Rapidly degraded true protein (Fraction B1) is TCA-precipitable protein from the buffer-soluble protein minus NPN. True protein with an intermediate degradation rate (Fraction B2) is the remaining N. Protein degradation rates are estimated by an in vitro procedure that uses Streptomyces griseus protease, and a curve-peeling technique is used to identify rates for each fraction. The amount of carbohydrate or N that is digested in the rumen is determined by the relative rates of degradation and passage. Ruminal passage rates are a function of DMI, particle size, bulk density, and the type of feed that is consumed (e.g., forage vs cereal grain).
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              The Potential of Animal By-Products in Food Systems: Production, Prospects and Challenges

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                asas
                Acta Scientiarum. Animal Sciences
                Acta Sci., Anim. Sci.
                Editora da Universidade Estadual de Maringá - EDUEM (Maringá, PR, Brazil )
                1806-2636
                1807-8672
                2020
                : 42
                : e46084
                Affiliations
                [2] Areia Paraíba orgnameUniversidade Federal da Paraíba orgdiv1Departamento de Zootecnia Brazil
                [1] João Pessoa Paraíba orgnameEmpresa Estadual de Pesquisa Agropecuária da Paraíba Brasil
                Article
                S1807-86722020000100201
                10.4025/actascianimsci.v42i1.46084
                9416fa01-6ae0-48e7-a79d-a63d830f5b44

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 13 January 2019
                : 17 May 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 32, Pages: 0
                Product

                SciELO Brazil

                Categories
                Pasture and Forage Utilization

                fibrous carbohydrates,intake,forage conservation,milk production,semiarid

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