To study the effect of Trichoderma harzianum Bi on qualitative and quantitative traits of tulip and gladioluss including stem length and diameter, bud diameter, petal length, bulb perimeter and bulblet number, an experiment based on completely randomized design with 8 replications were completed in situ. Main media mixture was 40% of coco peat+40 of field soil+20% of perlite. Treatments included enriched coco peat with trichoderma in different concentrations (0, 20, 50 and 100%) of total coco peat. Results showed that 100 and 50% of enriched coco peat significantly increased stem length and diameter. These treatments also had an effect on bud diameter significantly. Petal length was also affected by 100% of enriched coco peat treatment in comparison to control. For gladiolus results showed that 50 and 100% of enriched coco peat significantly increase stem diameter in compare with 20% and control but there was not any significant difference between 100 and 50% treatments. All treatments (20, 50 and 100%) had a significant effect on bulblet appearance in both mature and immature bulbs. Mature bulb perimeter was significantly affected by all treatments, although immature bulb perimeter was only affected by 50 and 100% treatments. Flower bud formation in immature bulbs which was treated with 50 and 100% of enriched coco peat increased significantly in comparison to control. Totally, it seems that trichoderma increases tulip cut flower quality traits and induces maturity in immature bulbs. None of the treatments applied was not able to significantly change (increase or decrease) stem length, inflorescence floret number, Postharvest opened floret number and leaf length of main and lateral buds in gladiolus corms. The data obtained from the experiment show that trichoderma increases polianthes cut flowers qualitative and quantitative traits.

Keywords