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    A detailed experimental knowledge on differentiation of nutritional quality depending on the phenological stages of native cool season grasses and satisfying the daily maintenance requirements of livestock
    (Hatay Mustafa Kemal Üniversitesi, 2019) Çeliktaş, Nafiz; Can, Ersin; Kaya, Şerafeddin; Uygur, Veli
    Aims: For a proper range management and livestock feeding operations need to detailed chemical analyses and knowledge on pasture composition. Methods and Results: Seven native cool-season grasses that are Festuca arundinaceae L., Brachypodium pinnatum (L.) Beauv., Phleum pretense L., Dactylis glomerata L., Bromus inermis Leyss., Lolium perenne L. and Hordeum bulbosum L. were evaluated for their nutritive value at five different phenological stages. The chemical composition, quality and therefore their feeding value so the animal performance are directly under control of the stage of plant phenology. Stage of plant maturity decreases dry matter digestibility, dry matter intake and protein content, but increases in lignocellulosic structure with the advance phenology of the whole investigated perennial species. Conclusions: The species which have thickand longer leaves, and higher leaf/stem ratio determined as the more digestible, and also the metabolizable energy of the fast growing ones was considerably higher. The vast majority of the minerals’ concentration was distinctly reduced at stem elongation to flowering and then increased remarkably from that point to developing seed stalks. The fast growing species accumulated the minerals more. Grass Tetany risk (K/(Ca+Mg)) of the investigated species increased remarkably at head emergence and flowering stage. Most of the species were detected within the boundaries of the recommended Ca/P ratio for diet. Significance and Impact of the Study: The native pastures seem to satisfy the daily maintenance requirements of most livestock in respect to most minerals without any supplementation via correct timing for feeding.