Effectiveness of native Rhizobium on nodulation and growth properties of dry bean (Phaseolus vulgaris L.)

This study was conducted in order to evaluate the symbiotic effectiveness of native Rhizobium isolated strains on number of nodule, weight, and morphological properties of dry bean. To realize this purpose, fresh and healthy root nodules were collected from major dry bean-growing districts of Konya, Turkey. These nodules were used to determine the effects of native Rhizobium isolated strains in the experiments. The first experiment was conducted to the determination of the most effective native isolated strains, by using Leonard bottles. Six (1, 3, 5, 23, 69 and 85) isolated strains of 94 native Rhizobium bacteria were found the most effective as compared with reference strain Rhizobium tropici CIAT899. The second experiment was conducted as pot experiment and arranged in a complete randomized block design with three replicates per bacteria. The subjects of the treatment subjects are control, nitrogen control, native isolated strain 1, native isolated strain 3, native isolated strain 5, native isolated strain 23, native isolated strain 69, native isolated strain 85, reference strain (R. tropici CIAT899) and mix strain. It has been shown that the used strains were significantly (P<0.05) increased nodulation and other morphological parameters. Significant differences existed in the symbiotic potential of the investigated strains. These results indicate that effective strains which were isolated from dry bean roots had potential for use as inoculants on beans (Phaseolus vulgaris L.). However, Rhizobium strains should be genetically identified before they are being subjected to recommend as commercial inoculations.Keywords: Native Rhizobium, inoculation, bean, nitrogen fixation, yield, yield component

Morphological identification of vesicular-arbuscular mycorrhiza on bulbous plants (Taurus mountain in Turkey)

This study was conducted to investigate the morphological identification of vesicular-arbuscular mycorrhiza (VAM) on bulbous plants in the Taurus Mountains in Turkey. Thirteen soil samples and bulbous roots were taken from the rhizosphere of bulbous plants. The soils were analyzed for the number of VAM spores and chemical and physical properties. In addition, the roots were examined for infection levels, and morphological identification of VAM spores was made. All tested plants are considered mycorrhizal plants. We determined three spore species (Glomus mosseae, Glomus hoi and Scutellospora calospora) from the surveyed soils. The spore distribution rates were as follows: G. Mossea 61.54 %, G. Hoi 23.07 % and Scutellospora calospora 15.38 %. Results suggest that VAM fungal spores and root colonization display variation in rhizosphere under bulbous plants in different ecological conditions

Partial root zone drying irrigation and different nitrogen levels affect on nitrogen recovery efficiency for drip irrigated sugar beet crop

This study was conducted to determine different nitrogen levels affect on nitrogen recovery efficiency, NRE, by use of drip irrigation under partial root zone drying irrigation and fertigation techniques for sugar beet plant. Research was performed in 2012 and 2013 at Konya - Çumra Plain of Turkey and Stine sugar beet cultivar was used. In study, application of 100% irrigation water requirement of plant, FI (Full Irrigation) and 50% application of FI by using fixed (FPRD50) and alternative partial root drying (APRD50) irrigation techniques, and application of 100% nitrogen requirement of sugar beet, FN (Full Nitrogen) with two deficit nitrogen treatments of 75% (DN75) and 50% (DN50) of FN levels were applied by drip irrigation. Different deficit nitrogen applications affect on crop nitrogen use was researched comparatively under different irrigation techniques and fertigation method. The results showed that among the irrigation treatments, differences in NRE from nitrogen fertilizer were found not significant. DN50 was found the highest NRE of crop from nitrogen fertilizer. The greatest performances combinations in NRE of crop from fertilizer nitrogen were, FIDN50 as 52.6%, APRD50DN50 as 48.5% and FPRD50DN50 as 41.0% interactions. Those results showed that nitrogen requirement of crop can be reduced for drip irrigated sugar beet farming