Artículos de revistas
Production regions, physical and physiological quality of Brachiaria brizantha cv. BRS 'Piatã' seeds1
Fecha
2019-01-01Registro en:
Revista Ciencia Agronomica, v. 50, n. 4, p. 552-561, 2019.
1806-6690
0045-6888
10.5935/1806-6690.20190065
S1806-66902019000400552
2-s2.0-85077358330
S1806-66902019000400552.pdf
9669833663325445
0000-0002-1720-9252
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal de Goiás (UFG)
Universidade Federal da Paraíba (UFPB)
Institución
Resumen
The quality of seeds is influenced by the climatic conditions of the production field. The identification of characteristics of the best forage seed fields allows the improvement of the sector. In this study, the aim was to identify climatic characteristics of producing regions that may affect the physical and physiological quality of Brachiaria brizantha cv. BRS 'PiatÃ' seeds. Seeds from 10 lots were evaluated for purity, other seeds, mass of a thousand seed, water content, germination, dormancy, emergence, seedling emergence in sand and seedling emergence in the field. Temperature and precipitation data of each production field from flowering to harvest were obtained. The means of treatments were compared by the Scott-Knott test at 5% probability. In order to discriminate which environmental factors influenced seed quality, multivariate statistical analysis was applied through Principal Component Analysis. It was concluded that production fields with temperatures above 30 °C in flowering, threshing and harvesting periods are related to the production of 'PiatÃ' grass seeds of lower physical and physiological quality. Fields with accumulated rainfall above 500 and 137 mm in the flowering and harvesting period, respectively, are unfavorable to seed vigor.