Ereğli Tarım Bilimleri Dergisi Current Issue

This study was conducted at Van Yuzuncu Yil University's Department of Horticulture to evaluate the effects of various PGPR (Plant Growth-Promoting Rhizobacteria) isolates on three lettuce varieties under field and greenhouse conditions. The varieties included Great, Kıvırcık, Iceberg for field conditions, and Chianti, Defne, Bombolo for greenhouse conditions. PGPR isolates used were Control, FZB42 (Bacillus amyloliquefaciens), CC44 (Pseudomonas fluorescens), and CC37/2 (Pantoea agglomerans). Field trials showed Iceberg had the largest head diameter (11.48 cm), and Great had the highest head weight (452.91 g). In greenhouse trials, Bombolo had the largest head diameter (10.91 cm), and CC44 led to the highest head weight (125.22 g). Kıvırcık yielded the highest leaf number in the field, while Bombolo excelled in greenhouse conditions. Although PGPR isolates had limited effects on leaf number, they significantly influenced head diameter and weight, especially in field trials. Variety differences were crucial, with PGPR effects varying based on environmental conditions. Additionally, pH levels were significantly impacted, with Great recording the highest leaf pH in the field and Chianti in the greenhouse. These findings suggest that selecting appropriate PGPR strains and optimizing environmental factors can enhance lettuce yield and quality. Future research should focus on broader field trials and the integration of PGPR with reduced chemical fertilizers for sustainable lettuce production.

Roses (Rosa spp.), members of the Rosaceae family, are widely cultivated ornamental plants with significant commercial value worldwide. Vegetative propagation of roses is typically achieved through cuttings; however, this process often results in substantial losses. This study investigated the effects of plant growth-promoting rhizobacteria (PGPR) applications on the rooting performance of garden rose cuttings. The PGPR strains used in the study were identified via PCR analyses for the presence of the indole acetic acid (IAA) gene region, and three different formulations were prepared: Formulation 1 contained only Bacillus subtilis, Formulation 2 contained only Bacillus cereus, and Formulation 3 was a mixture of Bacillus subtilis and Bacillus cereus. The results demonstrated that PGPR applications significantly enhanced the rooting rate of rose cuttings. Compared to the control group, the PGPR-treated cuttings exhibited a 50-60% increase in rooting rate, supporting seedling root development. These findings indicated that Bacillus species rhizobacteria had positive effects on the rooting process in rose cuttings. The study emphasizes the potential of using environmentally friendly biostimulants, such as PGPR, in the ornamental plant industry as an alternative to hormones and chemicals. In conclusion, it is recommended that PGPR-based biostimulants be considered as a sustainable and effective alternative for rose cultivation.

This study aimed to assess the impact of PGPR (Plant Growth-Promoting Rhizobacteria) on the yield and quality of various melon (Cucumis melo L.) cultivars under Van ecological conditions during the 2016/2017 season. The experiment utilized PGPR applications including FZB42 (Bacillus amyloliquefaciens), CC378/2 (Pantoea agglomerans), and CC44 (Pseudomonas fluorescens), with six melon cultivars: Kırkağaç 637, BT Akhisar, Napolyon F1, Lokma F1, Lokum F1, and Ananas. The study was conducted using a randomized block design with three replications. Results indicated that PGPR applications enhanced several growth and yield parameters: stem thickness increased by up to 9.2%, leaf length by up to 12.9%, petiole length by up to 8.3%, fresh leaf weight by up to 12.8%, dry leaf weight by up to 12.9%, average fruit yield per plant by up to 39.1%, average fruit weight by up to 21.9%, fruit flesh thickness by up to 17.6%, fruit width by up to 7.4%, fruit length by up to 9.2%, average number of branches by up to 21.1%, and total branch length by up to 13.2%.

Alfalfa silage is widely used in the ration of animals. The aim of this study was to determine the publication trends and trending topics of studies on alfalfa silage utilisation and alfalfa fermentation (CAU) in cattle based on the data obtained from the Web of Science (WoS) Core Collection database. The Biblioshiny package, VOSviewer viewing programme and Excel 2022 were used for analysis. A total of 399 documents related to the researched topic were retrieved from WoS from 1980 to 2024. 1203 authors were included in the study. The average citation rate per article is 38.36. The number of articles with a single author is 16. Most of the publications on CAU were found in English language. It was found that the journal that published the most articles was Journal of Dairy Science (198), the most prolific author was GA. Broderick (27), the most cited author was GA. Broderick (2254), the most cited document author was MS. Allen (1073), the most frequently used keyword was “dairy cow”, and the most cited country was USA (459). When the results of the trend topic analysis are analysed, it can be said that the topics on increasing silage quality and nutrient content have come to the forefront in recent researches. This study can provide detailed information about the situation in the current literature in the field of CAU.