| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000435924 |
| ISSN: | 0001-3765 |
| Authors: | Brunetti, Henrique B1 Cavalcanti, Pórtya P1 Dias, Carlos Tadeu S1 Pezzopane, José Ricardo M2 Santos, Patrícia M2 |
| Institutions: | 1Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil 2Empresa Brasileira de Pesquisa Agropecuaria, Gado de Corte, Sao Carlos, Sao Paulo. Brasil |
| Year: | 2020 |
| Volumen: | 92 |
| Number: | 3 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | This study aimed to characterize Brachiaria brizantha cv. Marandu seasonal production (seasonality) and its variation (climate risk) yearlong throughout Brazil. Data from weather stations in Brazil (1963-2009), were associated with an empirical herbage accumulation rate (HAR; kg DM ha-1 day-1) model which considers growing degree-days adjusted by a drought attenuation index. Simulations were performed under 20, 40, 60 and 100 mm of soil water holding capacities (SWHCs). HAR’s means and standard deviations were calculated for the seasons of the year. Thereafter, cluster analysis and calculations were performed to gather similar weather stations and characterize seasonality and climate risk indexes. Cluster analysis resulted in four Groups per SWHC. The north of Brazil (Group 1) presented the lowest seasonality and climate risk indexes and low need for precautions. In the middle west (Group 2), the seasonality index ranged from medium-high to high. Winter and Summer presented the lowest and highest production, respectively. In the south of Brazil, some regions in the southeast and northeast (Group 3), Winter presented the lowest production and highest climate risk index, probably due to low temperatures. The northeast (Group 4) presented a seasonality index that ranged from medium-high to very high and low productions |
| Disciplines: | Agrociencias |
| Keyword: | Gramíneas, Pastos, Plantas forrajeras, Modelos de producción, Estacionalidad climática, Riesgo climático, Brachiaria brizantha, Poaceae |
| Keyword: | Gramineae, Grasses, Forage plants, Production models, Climate seasonality, Climate risk, Brachiaria brizantha, Poaceae |
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