Compost is usually made of biodegradable wastes. Today, compost, bio-agent bacteria and mycorrhizae are used as the key components of sustainable agriculture. This study was conducted to determine the effects of compost treatments alone and combined with bacteria, mycorrhiza and commercial fertilizers on growth, flower and bulb quality parameters of the ‘Jan van Nes’ tulip cultivar. Compost was made of grape pomace and set at different EC levels. Three different compost ratios (0%, 20% and 40%), three different EC levels (0.75, 1.10, and 1.45 dS/m) and combinations with or without bacteria and mycorrhizae were experimented. Flower stalk length, perianth length and vase life were identified as the most striking parameters for growth and flowering of tulip plants. The best outcomes in terms of flower stem length (34.20 cm), perianth length (44.85 mm) and vase life (7.00 days) were obtained from 0% compost treatments. Increasing compost ratios had adverse effects on plant growth and bacteria and mycorrhizae treatments alone did not provide any significant effects. However, combining with different compost ratios increased the effectiveness of bacteria and mycorrhiza. EC of 0.75 yielded better results than the other EC levels.

This research was carried out to determine the interaction between some bacteria naturally existing in casing soil and Agaricus bisporus (Sylvan Hauser A15) hypha in laboratory (in vitro) and cultivation (in vivo) conditions, and to confirm its effects on mushroom yield. Totally 32 bacteria (3 Gram (+) and 29 Fluorescent Pseudomonads) was isolated from casing soil and healthy sporophores. As a result of in vitro experiment carried out to determine the effects of bacteria on mycelium growth of A. bisporus, 24 bacterial isolates were found more effective at the rate of 2 to 115% than control treatment. To determine the effects of bacterium, chosen at the end of in vitro experiments, on mushroom yield in cultivation conditions, three experiments were established in March, May and July in 2008. At the end of experiments, bacterial isolates provided 8 – 40 % increase in total yield. Population density and change in population number related to time was observed during growing period, after the inoculation of bacterial isolates into casing soil. According to the results, Pseudomonas fluorescens (T 4/2 and Ş 8), P.putida (Ş 2/1 and Ş 10) and Bacillus mycoides (T 7/2) bacterial isolates were colonized successfully both in casing soil and sporophores.

Growth regulators such as Indole-3-Butyric Acid (IBA) are generally used to promote root formation of rose cuttings. However, today, within the scope of sustainable agricultural practices, research studies of new materials and methods alternative to synthetic chemicals in the plant production process are gaining momentum. At the beginning of such alternative applications are plant growth-promoting rhizobacteria (PGPR) and mycorrhizal fungi, which are increasingly used today, promoting plant growth. In this study, Bacillus cereus (ZE-7), Pseudomonas putida (ZE-12) rhizobacteria and mycorrhiza (6000 ppm) were applied to 12-15 cm long softwood rose cuttings. The softwood cuttings were kept in the mycorrhiza suspension for 10 seconds and in the rhizobacteria suspension for 30 minutes and then planted in the rooting medium. In the study, in order to determine the effects of applications on steel root development; rooting rate (%), callus rate (%), decay rate (%), root number (number) and root length (cm) parameters were examined. In the results of working; the highest rooting rate (19.44%), the highest callus rate (38.89%) and the highest number of roots (8.64 units) were obtained in ZE-12 treated cuttings. In particular, rhizobacteria application showed a high effect on reducing the rate of decay in steels. The lowest decay rate in the steels was obtained from the ZE-7 bacterial strain application (8.33%) compared to the control (38.89%). As a result, it was concluded that mycorrhiza and rhizobacteria applications can be applied to rose cuttings and these applications as an alternative to IBA in rooting.