SciELO - Scientific Electronic Library Online

 
vol.27 issue1Adaptability and phenotypic stability of crisp lettuce cultivars in hydroponicsSPAD index and potato yield, in two planting periods, depending on nitrogen rates author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Horticultura Brasileira

Print version ISSN 0102-0536On-line version ISSN 1806-9991

Abstract

NASCIMENTO, Warley M; SILVA, João Bosco C.; SANTOS, Paulo EC  and  CARMONA, Ricardo. Germination of carrot seed primed and pelleted with several ingredients. Hortic. Bras. [online]. 2009, vol.27, n.1, pp.12-16. ISSN 0102-0536.  http://dx.doi.org/10.1590/S0102-05362009000100003.

Carrot seeds are small and the distribution in the field by seeders is generally very difficult. Seed pelleting has been used to improve sowing and consequently the stand establishment. Pelleted seeds generally present lower germination rate than raw seeds from the same seed lot. Seed priming has been used to increase germination rate of several species. Various binder materials for seed pelleting were evaluated and the relation between the osmoconditioning and germination of pellet seeds verified, using 'Alvorada' carrot cultivar. The pellet was obtained through a mixture of equal parts of microcelulose and sand as filling materials; five binder materials were also evaluated: bentonite, methocel, opadry, rhoximat and arabic gum. Part of the pelleted seeds received an external coat treatment (iriodin). Raw seeds were included as control. In another study, seeds were primed in an aerated solution of polyethylene glycol, dried and then pelleted. Rhoximat and opadry showed better characteristics as binder materials presenting pellets with smooth surface, uniform and excellent external appearance. In general, seed pellets showed a slight decrease of the germination rate and total germination compared to raw seeds, with greather differences for pellets finished with iriodin. Priming enhanced the germination rate of pelleted carrot seeds.

Keywords : Daucus carota; plantability; stand establishment.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License