SciELO - Scientific Electronic Library Online

 
vol.24 issue4Pittosporum undulatum Vent.: subsidies to the control and managementCaladium cv. Florida sweetheart production at different planting depths and sowing dates author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Ornamental Horticulture

On-line version ISSN 2447-536X

Abstract

SANTOS, Patrick Luan Ferreira dos  and  CASTILHO, Regina Maria Monteiro de. Germination and development of ornamental sunflower seedlings in substrates. Ornam. Hortic. [online]. 2018, vol.24, n.4, pp.303-310. ISSN 2447-536X.  http://dx.doi.org/10.14295/oh.v24i4.1152.

The ornamental sunflower is a growing crop in recent years due to its rapid return on investment and expressive representation in the flower market, and research on the ideal substrate for seedling production is essential to maximize information for the crop. Thus, the objective was to evaluate the germination and development of ornamental sunflower seedlings in different substrates compositions. The experiment was installed in a greenhouse, where they were put to germinate, seeds of sunflower type “Vincent's Choice” in poliestileno trays on substrates with or without addition Slow Release Fertilizer (SRF) at the dose 2 g L-1. The experimental design was completely randomized with 4 treatments [T1- Charcoal + pine bark + peat + expanded vermiculite (1:1:1:1), T2- Coconut fiber + carbonized rice hull + peat + expanded vermiculite (1:1:1:1), T3- Charcoal + pine bark + peat + expanded vermiculite (1:1:1:1) + SRF, T4- Coconut fiber + Carbonized rice hull + peat + expanded vermiculite (1:1:1:1) + SRF] with 8 replicates of 8 seeds, totaling 64 seeds per substrate. It was evaluated: the percentage, index and average germination time, chlorophyll content, length, fresh and dry mass of shoot and root. It was observed that there was no difference in the percentage of germination, but T2 and T4 promoted emergency in the lowest mean time (3.19 and 3.46 days, respectively) with a higher rate of velocity (2.43 and 2.25 respectively), still, T4 presented increments with more than 50% of fresh and dry mass. Thus, it is concluded that the T4 substrate is recommended for germination and development of ornamental sunflower type “Vicent's Choice”.

Keywords : Helianthus annuus; slow release fertilizer; seedling production; seed vigor.

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