Title of the manuscript: Effects of different nitrogen doses and cultivars on fermentation quality and nutritive value of Italian ryegrass (Lolium multiflorum Lam.) silages ABSTRACT Objective: The fermentation profile and silage quality of 3 Italian ryegrass (Lolium multiflorum Lam.) (Devis, Hellen and Trinova) cultivars (cvs. Devis, Hellen and Trinova) treated with 5 nitrogen doses (0, 50, 100, 150 and 200 kg ha -1 ) were evaluated. Methods: The experiment was laid out in split plot in randomized completed block design with three replications. Annual ryegrass cultivars used in this study were have been commonly grown in Turkey. Nitrogen doses were set inas main plot and nitrogen doses in split plot in the field. while Annual ryegrass as split plot in the field experiments. Plants were harvested atin full-flowering stage with DM content about 220 g kg -1 for first cutting and 260 g kg -1 for second cutting. Samples Harvested plants were chopped theoretically into 2-3 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. consequently silage quality. A c c e p t e d A r t i c l eEspecially the significant increase in protein content was remarkable, however, silage fermentation properties were adversely affected by the increasing nitrogen dose. Conclusion:150 kg ha -1 nitrogen dose can be recommended for annual ryegrass harvested atin 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.

The aim of this study was to determine cotton cultivars in terms of high yield and fiber technological properties in Southeastern Anatolia ecological conditions. For this purpose, the study was carried out with 11 cotton (G. hirsutum L.) cultivars in 2019 and 2020. Field experiment was designed based on randomized complete block design with four replications. As a result of the study, it was observed that all yield and quality parameters were affected by the cultivar, 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 in terms of 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 lint percentage. It was concluded that cv. Edessa and cv. Pg 2018 are more suitable for cultivation in Batman ecological conditions.

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Bu çalışma endüstriyel kenevir tohumlarının çimlenmesi boyunca yağ oranı ve yağ asidi içeriklerinin değişimini incelemeyi amaçlamıştır. Kontrollü koşullarda çimlenen endüstriyel kenevir (Cannabis sativa L. çeşit Vezir-55) tohumlarından 0 (kontrol), 24, 48, 72 ve 96. saatlerde alınan örneklerden yağ elde edilerek yağ oranı ve yağ asidi içerikleri tayin edilmiştir. Behenik, lignoserik, linoleik, palmitik, gamma-linolenik asit oranları ve çoklu doymamış yağ oranları üzerine çimlenme saatlerinin etkisi istatistiksel olarak önemli bulunmuştur. Bu parametreler için en düşük ve yüksek değerler sırasıyla %0.22-0.35, %0.40-0.70, %47.33-49.11, %9.96-9.01, %1.29-1.61 ve %69.96-71.69 olarak tespit edilmiştir. Tohumdaki yağ oranı, araşidik, eykosapentaenoik, laurik, alfa-linolenik, margarik, miristik, oleik, palmitoleik, risinoleik, stearik asit oranları ve doymuş ve tekli doymamış yağ asitleri oranları ise çimlenme saatlerinden etkilenmemiştir. Çalışmada elde edilen değerlere göre çimlenme sırasında yağ asitleri oranlarında değişimler olduğu önceki çalışmalarla benzerlik gösterirken yağ asitlerinin tohum tarafından seçici kullanımı ve sentezlenmesinin bitki türüne göre farklılık gösterdiği sonucuna varılmıştır.