Search

This study was carried out to determine the effects of different PGPR formulations, chemical fertilizers, and their combinations on some color characteristics and nutrient content of bract leaf of two cultivars of Euphorbia pulcherrima Willd. ex Klotzsch in a research greenhouse between July 2015 and July 2017. The treatments included bacterial formulations: (1) BI: Paenibacillus polymyxa TV-12E+Pseudomonas putida TV- 42A+Pantoea agglomerans RK-79, (2) BII: Bacillus megaterium TV-91C+Pantoea agglomerans RK-92+Bacillus subtilis TV-17C, (3) BIII: Bacillus megaterium TV- 91C+Pantoea agglomerans RK-92+Kluyvera cryocrescens TV-113C, and (4) BIV: Bacillus megaterium TV-91C+Pantoea agglomerans RK-79+Bacillus megaterium TV-6D). Also, fertilizer treatments included the full amount of commonly used Chemical Fertilizer (CF= 150 g 100 L-1) and combination of the reduced amount of chemical fertilizer by 50% with each bacterial formulation, and control. The first red leaves, life of bracts, color properties (L, a* and b*), content of anthocyanin, chlorophyll content in green leaf, macro and micronutrient contents of bracts were evaluated in the experiment. CF and BII+50%CF applications encouraged the coloring of bract leaves early (4.01%). It was determined that CF (7.76%), BI+50%CF (6.03%) and BII+50%CF (5.27%) applications significantly increased chlorophyll content of poinsettia bract when compared to the control. Darker colored bracts were obtained from BI and BIV applications compared to the control. The highest total nitrogen amount (3.69%), soluble phosphorus (4,285.33 mg kg-1), potassium (28,132.45 mg kg-1) and calcium (8,299.03 mg kg-1) amount were found in the BII+50%CF application. It was determined that bacterial formulations BI, BIV, BIV+50%CF and BII+50%CF had positive effects on some plant aesthetic, quality characteristics, and nutrient content of bract of poinsettia and can be used in poinsettia production stage as one of the biological products. Thus, bacterial formulations may replace or reduce use of chemical fertilizers in poinsettia production. [ABSTRACT FROM AUTHOR]

Use of fertilizers is important in agricultural production. In particular, it is more focused on organic fertilizer that increases yield and quality of crops and is not harmful to environment at the same time. In this study, the effect of bacterial biofertilizers on yield and some quality parameters were analyzed in two tomato cultivars (Solanum lycopersicum L., cv. Cevahir F1 and Pala F1) in greenhouse conditions. Three different concentrations (1, 3, and 5 gL-1 and control i.e. un-inoculated) and two different bacterial fertilizers including A: Azotobacter spp. (1×109 CFU), and B: mixture of Bacillus subtilis and Bacillus megatarium (1×109 UFC) were evaluated in a completely randomized design with 3 replications. The treatments were applied one week after planting of the seedlings. The solutions were given to the root zone of the plant and repeated 3 times at intervals of 10 days. Average fruit weight, fruit number per plant, fruit weight per plant, plant height, fruit width and length, total soluble solid, pH, ascorbic acid, chlorophyll content, dry matter yield and mineral content were evaluated on tomato. The effects of treatments were found significant on plant growth parameters. Bacterial fertilization increased yield and other parameters in all treatments. Besides, the effects of treatments were significant on mineral content of tomato fruits. [ABSTRACT FROM AUTHOR]