ارزﻳﺎﺑﻲ ﻛﻴﻔﻴﺖ ﺑﺬر ﮔﻴﺎه داروﻳﻲ ﻫﻤﻴﺸﻪ ﺑﻬﺎر Calendula officinalis L) ﺑﺎ ﻛﺎرﺑﺮد ﻧﻬﺎده ﻫﺎی آﻟﻲ

Abstract
Effect of organic fertilizers on seed yield of Calendula officinalis L. was investigated in a factorial experiment based on complete randomized block design with three replications and consequently, an experiment was conducted to evaluate its seed quality criteria in a factorial experiment based on completely randomized design with four replications in Research Station and Laboratory of Department of Horticultural Sciences and Landscape, University of Tehran in 2010. Treatments were two levels of cattle manure (without and with 20 t ha-1) and four levels of bacterial inoculant (containing N-fixing bacteria, P solubilizer bacteria, mixture of bacteria and control). Seed yield, 1000 seed weight and seed germination quality criteria were investigated. Results indicated that interaction effect of manure and bacterial inoculant caused the highest seed yield and 1000 seed weight. Application of manure significantly affected seed germination, seedling length and seed vigour index. Also, inoculation of seed by plant growth promotion bacteria showed significant effects on seed germination and uniformity, time to 95% germination, seedling weight and length and seed vigour index. In general, using cattle manure and plant growth promotion bacteria resulted in the highest amount of all measured criteria compared to non application of manure and bacterial inoculants.