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    Combining non-destructive devices and multivariate analysis as a tool to quantify the fatty acid profiles of linseed genotypes
    (Elsevier B.V., 2025) Arslan, Aysel; Aygun, Yusuf Ziya; Turkmen, Musa; Celiktas, Nafiz; Mert, Mehmet
    Linseed (Linum usitatissimum L.) and linseed oil, with a fatty acid profile rich in both macro and micro elements, are recognized as functional foods due to their valuable positive effects on health. Fatty acids composition (FAC) is a key indicator in assessing the quality of linseeds. The FAC of linseed is typically determined using chromatographic methods, yielding highly accurate results. However, chromatographic methods entail drawbacks such as requiring pre-chemical processes, generating chemical waste, and being both expensive and time-consuming, similar to chemical analyses. This study focused on the feasibility of colorimeter and FT-NIRS data to determine the FAC (%), protein (%) and neutral detergent fiber (NDF %) in linseed samples. By employing the PLSR analysis based on FT-NIRS, it was determined that the ratios of stearic (R2val = 0.74, RMSEP = 0.09 %), oleic (R2val = 0.75, RMSEP = 0.26 %), linoleic (R2val = 0.85, RMSEP = 0.58 %), linolenic (R2val = 0.71, RMSEP = 1.07 %), 8,11,14 eicosatrienoic (R2val = 0.77, RMSEP = 0.02 %), margaric (R2val = 0.71, RMSEP = 0.01 %), myristic (R2val = 0.75, RMSEP = 0.02 %), and behenic (R2val = 0.74, RMSEP = 1.12 %) in linseed could be successfully predicted. Furthermore, results demonstrated that the protein (R2val = 0.87, RMSEP = 0.9 %) and NDF (R2val = 0.90, RMSEP = 0.6 %) content in linseeds can be successfully predicted. PLSR has demonstrated that FT-NIRS has relatively higher predictive capability compared to color models. © 2024 Elsevier B.V.
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    DIURNAL VARIATION OF ESSENTIAL OIL RATIO AND COMPOSITION OF SOME BASIL GENOTYPES
    (Bangladesh Botanical Soc, 2022) Aygun, Yusuf Ziya; Eren, Yilmaz; Ertekin, Esra Nermin
    The change of essential oil ratios and components of five different basil genotypes harvested at different times (00:00, 06:00, 12:00, 18:00) in day was investigated. Plants were grown under the field conditions and essential oils of the plants were extracted by hydro-distillation method. Identification of essential oil components were performed by GC-MS. It was the G5 genotype that had the highest essential oil content in all plant parts, regardless of the time of day. The highest essential oil content (2.8%) was obtained from the dry leaves of the G5 genotype from the sampling made at 18:00. The main components of essential oils were determined as linalool, eucalyptol, trans alpha-bergamotene, methyl cinnamate, alpha-muurolol and eugenol. However, while the ratios of these components differed between genotypes, the changes in time of day were similar for some components. Linalool content tended to increase mostly in the middle of the day. This study indicated that essential oil ratio and components of different basil genotypes significantly differed according to harvesting times in day.
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    Effects of different nitrogen doses and cultivars on fermentation quality and nutritive value of Italian ryegrass (Lolium multiflorum Lam.) silages
    (Asian-Australasian Assoc Animal Production Soc, 2022) Ertekin, Ibrahim; Atis, Ibrahim; Aygun, Yusuf Ziya; Yilmaz, Saban; Kizilsimsek, Mustafa
    Objective: The fermentation profile and silage quality of 3 Italian ryegrass (Lolium multiflorum Lam.) cultivars (cvs. Devis, Hellen, and Trinova) treated with 5 nitrogen doses (0, 50, 100, 150, and 200 kg/ha) were evaluated. Methods: The experiment was laid out in split plot in randomized complete block design with three replications. Annual ryegrass cultivars used in this study have been commonly grown in Turkey. Nitrogen doses were set in main plot and cultivars in split plot in the field. Plants were harvested at full-flowering stage with dry matter content about 220 g/kg for first cutting and 260 g/kg for second cutting. Harvested plants were chopped theoretically into 2 to 3 cm lengths for ensiling. Chopped fresh materials were ensilaged by compressing in 2 L plastic jars about 3 +/- 0.1 kg. Results: Effects of N doses on dry matter, neutral detergent fiber, acid detergent fiber, dry matter digestibility, relative feed value, crude protein, pH, ammonia nitrogen, lactic acid, acetic acid, and lactic acid/acetic acid were statistically significant while water soluble carbohydrate, ash and organic matter were not statistically different. Ammonia nitrogen, crude protein, ash, organic matter, lactic acid, and lactic acid/acetic acid were affected by cultivars, but the other parameters were not. Increasing nitrogen applications positively affected the chemical composition of annual ryegrass silage. The significant increase in protein content was remarkable, however, silage fermentation properties were adversely affected by the increasing nitrogen dose. Conclusion: It can be recommended 150 kg/ha nitrogen dose for annual ryegrass harvested at full blooming stage. Even though the silage fermentation properties of the used cultivars were similar, cv. Devis gave better results than the others in terms of silage pH and relative feed value.
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    YIELD AND FIBER QUALITY CHARACTERISTICS OF SOME COTTON (Gossypium hirsutum L.) CULTIVARS GROWN IN THE SOUTHEASTERN ANATOLIAN CONDITIONS
    (Soc Field Crop Sci, 2022) Aslan, Ramazan; Aygun, Yusuf Ziya; Mert, Mehmet
    The aim of this study was to determine cotton cultivars for high yield and fiber technological characters in Southeastern Anatolian ecological conditions. For this purpose, the study was carried out with 11 cotton (Gossypium hirsutum L.) cultivars in 2019 and 2020. Field experiment was designed based on randomized complete block design with four replications. The results of combined analysis indicated that there were significant differences between cultivars in terms of yield and quality parameters except for the number of monopodia, fiber strength and fiber fineness. It was determined that cv. Edessa and cv. PG 2018 were superior to other cultivars for seed cotton yield, in respectively 4006.25 kg ha-1, 3971.42 kg ha-1. While these cultivars had higher fiber yield than all others, they were the least affected by the year difference. Cv. PG 2018 also had the highest plant height and ginning turnout. It was concluded that cv. Edessa and cv. PG 2018 are more suitable for cultivation in Batman ecological conditions.