Priming of Stylosanthes seeds

Ciência Rural

Pereira, Silvia Rahe¹  Alencar, Karina Margareti de Castilio⁴  Rodrigues, Adriana Paula D'Agostini Contreiras³  Laura, Valdemir Antônio² 

[1] Universidade Federal de São Carlos (UFSCAR), São Carlos, Brasil;Embrapa Gado de Corte;Universidade Anhanguera-Uniderp, Campo Grande, Brasil;Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, Brasil

关键词: forage;    physiological quality;    legume;    priming.;   

DOI  :  10.1590/S0103-84782012000400008

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

It is estimatedthat 60% of the area of cultivated pasture, in the Brazilian Savannah, is degradedor in process of degradation, due to, among other causes, the lack of nitrogen.The Stylosanthes genus is the legume which has the greater numberof cultivars used in tropical pastures, however, its seeds have characteristicswhich can difficult the formation of an adequate stand of plants on pasture.In this research the aim was to evaluate the effects of priming in the speedand uniformity of the Stylosanthes capitata, S. macrocephalaand S. guianensis seeds germination. The seeds were kept for 12,24, 36 and 48 hours in aired media PEG 6,000 at 0.0, -0.5, -1.0 and -1.5MPa.Afterwards, they were sent to the germination test. The variables analyzed weregermination percent, germination speed index (GSI) and average germination time(AGT). For S. capitata it is recommended priming at 0.0 MPa for10 hours, and for S. macrocephala the recommended potential is-0.5 MPa. However, for the S. guianensis the priming is not recommendedunder the time and potentials evaluated in this research.

【 授权许可】

CC BY-NC