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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
11/12/2023 |
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Autoria: |
SMITH, A. D. |
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Afiliação: |
ARTHUR D. SMITH, Utah State University and Utah State Department of Fish and Game. |
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Título: |
Determining common use grazing capacities by application of the key species concept. |
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Ano de publicação: |
1965 |
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Fonte/Imprenta: |
Journal Range Management, v. 18, n. 4, p. 196-201, Jul. 1965. |
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Idioma: |
Inglês |
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Conteúdo: |
Correct substitution rates of one grazing animal for another under common use are uniform, being governed at any point by the utilization standard of some single species. This key species may vary at different levels of animal combinations, thus changing the rate of substitution to another but still constant rate. Under certain conditions, common use can add capacity in one direction only, e.g. when the animal to which the range is less suited is substituted for the other. In this case the best suited animal alone provides maximum grazing capacity. The capacity under common use may be greater than that realized with the less suited animal alone, or greater than either animal alone, depending upon the particular combination of animal numbers that are present and the particular range. No blanket statement may be made that common use increases grazing capacity. Each situation must be determined independently upon the basis of animal preferences and the forage present. Administrative problems and social objectives, which were not considered here, may justify allocations of range resources on other bases than grazing capacity. Table 1. Forage factors reported by Cook (1954) reanalyzed to illustrate indicator species concept; Table 2. Utilization and percent of diets of major forage species for deer (D) and sheep (S) on study area in Logan Canyon, Utah; Table 3. Calculated grazing capacities of a range for selected combinations of deer and sheep with two key species; Table 4. Utilization by deer and cattle on a deer winter range near Fillmore, Utah, used by cattle spring and fall and calculated forage factors under common use; Figure 1. Theoretical cumulative utilization of three plant species during the grazing season; Figure 2. Substitution curves between mule deer an(l cattle near Fillmiore, Utah, and mule deer and sheep near Logan, tUtah; FIigure 3. Theoretical substitution curves under five different situations. MenosCorrect substitution rates of one grazing animal for another under common use are uniform, being governed at any point by the utilization standard of some single species. This key species may vary at different levels of animal combinations, thus changing the rate of substitution to another but still constant rate. Under certain conditions, common use can add capacity in one direction only, e.g. when the animal to which the range is less suited is substituted for the other. In this case the best suited animal alone provides maximum grazing capacity. The capacity under common use may be greater than that realized with the less suited animal alone, or greater than either animal alone, depending upon the particular combination of animal numbers that are present and the particular range. No blanket statement may be made that common use increases grazing capacity. Each situation must be determined independently upon the basis of animal preferences and the forage present. Administrative problems and social objectives, which were not considered here, may justify allocations of range resources on other bases than grazing capacity. Table 1. Forage factors reported by Cook (1954) reanalyzed to illustrate indicator species concept; Table 2. Utilization and percent of diets of major forage species for deer (D) and sheep (S) on study area in Logan Canyon, Utah; Table 3. Calculated grazing capacities of a range for selected combinations of deer and sheep with two key species; Table 4. Util... Mostrar Tudo |
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Palavras-Chave: |
Big game; Common Use; Grassland; Grazing animal; Grazing Capacities; Key Species Concept; Management; Range Production; Substitution Rates. |
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Thesagro: |
Bovino; Caprino; Manejo; Nutricao animal; Pastagem Nativa. |
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Thesaurus Nal: |
Agropyron; Animal nutrition; Bromus; Cattle; Elymus; Grazing; Harvesting; Lathyrus; Sheep; Symphoricarpos; Thalictrum. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 4 | |
| 3. |  | SERRATO, R. V.; MENESES, C. H. G. de; VIDAL, M. S.; SANTANA-FILHO, A.; IACOMINI, M.; SASSAKI, G. L.; BALDANI, J. I. Structural studies of an exopolysaccharide produced by Gluconacetobacter diazotrophicus Pal5. Carbohydrate Polymers, v. 98, p. 1153-1159, 2013 .| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 4. | | SERRATO, R. V.; MENESES, C. H. G de; SASSAKI, G. L; SANTANA FILHO, A. P.; ROUWS, L. F. M.; ARAUJO, J. L. S. de; CHAVES, M. S.; IACOMINI, M.; BALDANI, J. I. Chemical and structural analysis on the exopolysaccharide produced by the nitrogen-fixing bacterium Gluconacetobacter diazotrophicus Pal5 In: ANNUAL MEETING OF BRAZILIAN BIOCHEMISTRY AND MOLECULAR BIOLOGY SOCIETY, 40., 2011, Foz do Iguaçu. Abstracts. São Paulo: SBBq, 2011| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agrobiologia. |
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| Registros recuperados : 4 | |
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