Vermicompost and Trichocompost in Combination with Inorganic Fertilizers Increased Growth, Flowering and Yield of Gladiolus Cultivar (GL-031) (Gladiolus grandiflorus L.)

The yield and quality of flower is greatly influenced by the quantity and type of fertilizers used. Because of the hazards of long-term chemical fertilizer, more and more farmers all over the world are shifting to organic fertilizers for ensuring sustainable flower production. Keeping these points in view, present investigations were carried out to evaluate the combined impact of organic manure, inorganic fertilizer and bio-control agent on yield and quality of gladiolus at the Floriculture Research Field, Bangladesh Agricultural Research Institute, Gazipur from October, 2014 to May 2015. The single factor experiment consisted of eight treatments namely: T1: Control (Recommended dose of fertilizer) (N200 P50 K150 S30 B2Zn3kg/ha), T2:Tricholeachate (5000 l/ha) + ¼ RDF, T3:Bokashi (3 t/ha) + ¼ RDF, T4: Mustard oil cake (500 kg/ha) + ¼ RDF, T5:Trichocompost (3 t/ha) + ¼ RDF, T6: Farmyard manure (5 t/ha) + Trichocompost (3 t/ha) + ¼ RDF, T7: Poultry manure (5 t/ha) + Trichocompost (3 t/ha) + ¼ RDF and T8:Vermicompost (5 t/ha) + Trichocompost (3t/ha)+ ¼ RDF. The experiment was conducted in Randomized Complete Block Design with three replications. Application of organic manure, chemical fertilizer and bio-control agent showed significant variations on most of the parameters. Result revealed that early sprouting of corm (8 days) was recorded from treatment T6. The treatment T7 has taken the minimum period (68 days) for 80% spike initiation. The maximum length of spike (80.0 cm) and rachis (34.0 cm), number of florets/spike (16), number of spikes/ha (200000) was registered with the treatment T8. However, the highest number (2.5/hill) and weight of corm (60.0 g) and cormel per plant (20.0) was recorded with treatment T8. So, application of Vermicompost (5 t/ha) and Trichocompost (3t/ha) with ¼ RDF showed best result on yield and quality of gladiolus.