PJB-2023-177
Effects of increasing doses of fertilizer (KG) and rhizobacteria (PGPR) applications on yield and quality in greenhouse tomato cultivation
Yusuf ÇELİK
Abstract
The unbalanced use of chemical fertilizers deteriorates the structure of the soil rapidly as well as decreasing the yield. For these and similar reasons, the use of chemical fertilizers in the soil causes both environmental pollution and an increase in chemical residues in the products. This research was carried out to reduce the amount of chemical fertilizers with the use of microbial fertilizers and to increase yield and yield elements in tomatoes. In this study, the effects of reducing the use of chemical fertilizers and increasing the use of microbial fertilizers on yield and quality were investigated. Present study was conducted control, PGPR, KG, (PGPR + 1/2KG), (PGPR+KG) and (PGPR+2KG) combinations. Chemical fertilizers were calculated over pure amounts and given by drip irrigation. Bacterial applications; 1st application 100 ml/da after sowing, 2nd application; A third application was made at 200 ml/da 2-4 weeks later, and 200 ml/da 6-8 weeks later. Tomato variety Seyran F1 was used as plant material. According to the trial random blocks trial design; Three blocks and each block were divided into four plots and each plot of 16 applications and each application of 12 plants. The data obtained at the end of the experiment were analyzed by analysis of variance according to random parcel design in the JUMP package program and Tukey multiple comparison test was applied at 1% and 5% significance levels to determine the difference. According to the research results; In both locations, KG+PGPR combinations increased yields compared to fertilizer (KG) applications alone. Using lower than recommended fertilizer rates, without inoculants, resulted in less plant growth, significant reductions in yield. According to the measurements made in the samples selected from both greenhouses, the PGPR+2KG, PGPR+KG and PGPR+1/2KG combinations reached the highest yield in the same group. Yield per plant in greenhouse-A was 10.1% compared to control application, and 8.5% in greenhouse-B compared to control application. As a result of this research; PGPR+1/2KG application, which is the doses lowest among the applications in the same group in both greenhouses, is recommended in terms of ensuring economic efficiency and protecting soil and environmental health.
Keywords: Tomato, greenhouse, fertilization strategies, yield and quality
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