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    GROWTH, HERBAGE YIELD AND QUALITY EVALUATION OF TURFGRASSES SPECIES UNDER AGRO-ECOLOGICAL CONDITIONS OF IĞDIR, TURKEY
    (Pakistan Botanical Soc, 2024) Hosafioglu, Ibrahim; Akdeniz, Hakki; Turan, Nizamettin; Seydosoglu, Seyithan; Iqbal, Muhammad Aamir; El Sabagh, Ayman
    The agro-botanical and qualitative testing of indigenous turfgrass species have remained neglected despite their enormous potential to provide nutritional herbage for dairy animals. A multi-year research was conducted to appraise the growth, herbage yield and nutritional quality performance of eight turfgrass species (Lolium perenne, Festuca arundinacea, Poa pratensis, Festuca rubra rubra, Festuca rubra comutata, Festuca rubra trichophylla, Festuca ovina, Agrostis tenuis) during 2015 and 2016 under the agro-ecological conditions of Igdir, Turkey. The experiment was carried out in a factorial design with three replications, while response variables included different agro-botanical traits and green herbage potential of turfgrasses under investigation. The results revealed that Festuca arundinacea remained superior for canopy covering rate, green herbage yield, plant height, root depth, leaf width, grass quality and greenness of leaf color.It was followed by Lolium perenne and Festuca rubra rubra. However, Festuca ovina and Agrostis tenuis performed below par to other turfgrass species during all seasons of both years. Therefore, turfgrass species 'Festuca arundinacea', Lolium perenne and Festuca rubra rubra may be recommended for obtaining significantly higher green herbage yield and quality in all three seasons (spring, summer and autumn) in Igdir, Turkey and in other regions of having similar agro-climatic conditions globally.
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    YIELD AND NUTRITIVE VALUE OF ITALIAN RYEGRASS (LOLIUM ITALICUM L.) IS INFLUENCED BY DIFFERENT LEVELS OF NITROGENOUS FERTILIZER
    (Parlar Scientific Publications (P S P), 2019) Akdeniz, Hakki; Bozkurt, Mehmet Ali; Hosaflioglu, Ibrahim; Islam, Mohammad Sohidul; Hossain, Akbar; Elsabagh, Mabrouk; Iqbal, Muhammad Aamir
    Italian ryegrass is often fertilized with high levels of nitrogen (N) in order to ensure a maximum biomass yield. While overdose of any fertilizer is neither cost-effective nor environmentally sound. In this context, the study was carried out at the agricultural experimental area of Igdir University during 2013, to find out the optimum dose of nitrogenous fertilizers for maximizing the biomass yield as well as nutrients content of Italian ryegrass. Treatments were five levels of nitrogen viz., 0 (N-o), 2 (N-2), 4 (N-4), 6 (N-6) or 8 (N-8) kg da(-1), respectively. Treatments were arranged in a randomized completed block design with three replications. Data on green herbage and dry biomass yield as well as nutrients content such as Calcium (Ca), Magnesium (Mg), potassium (K), phosphorus (P), Crude protein (CP), Crude ash and Tetany ratio (K/(Ca+Mg)) were examined under the different levels of N. Results of the study showed that increasing rate of N fertilizer increased the green herbage as well as dry biomass yield of Italian ryegrass. The highest green herbage and dry biomass yield were recorded for the 8 kg N da(-1) (N-8) (1142.7 and 473.7 kg da(-1)) treated grass followed by those treated with a 6 kg N da(-1) (N-6) (1070.2 and 444.8 kg da(-1)). Similarly, the maximum seed yield was also recorded in the treatment of 8 kg N da(-1), followed by the treatment of 6 kg N da(-1). Considering the nutritional values, the levels of N and K in the ryegrass were decreased from the initial growth stages to seed stages. While, CP, Mg, P and Tetany ratios were decreased as growth stages of plant increased. Therefore, the application of 6 to 8 kg N da(-1) could be recommended for higher green herbage, dry biomass yield and also improving the nutrients content of Italian ryegrass under the condition of Igdir-Turkey.