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IntroductionWheat, including Triticum and Aegilops, belongs to the family Gramineae. Triticum is classified into 3 groups: diploid (2n = 14), tetraploid (2n = 28), and hexaploid (2n = 42) (Feldman et al., 1988). Turkey is known as the genetic diversity center of wild relatives of wheat. While the Middle East, Mediterranean, and West Asian gene centers have 22 species, Turkey by itself has 14 different species (Van Slageren, 1994).The cultivation of Einkorn (Triticum monococcum L.) and emmer wheat (Triticum dicoccum) significantly decreased with the widespread use of high-yield durum (Triticum durum L.) and bread (Triticum aestivum L.

The study was conducted to investigate the effects of different irrigation levels and nitrogen doses on yield, yield parameters, silage characteristics, digestibility, gas and methane production of corn silage. Three different irrigation levels (50%, 75% and 100% of depleted water) and 3 different nitrogen doses (100, 200 and 300 kg ha-1 N) were applied to corn silage. Experiments were implemented in split-split plots design with three replications during the growing seasons of 2013-2014. Plants were harvested at milk-dough stage and yield and morphologic characteristics were determined. Then, harvested plants were silaged and chemical characteristics were investigated. Irrigation level x nitrogen dose interaction was not found to be significant. Increasing nitrogen doses increased plant height, plant diameter, green herbage yield, crude protein, metabolic energy, gas production and organic matter digestibility and decreased pH levels, ADF and NDF ratios. Increased irrigation levels positively affected green herbage yield, plant height, plant diameter and increased ADF and NDF ratios. Gas production, metabolic energy and organic matter digestibility decreased with increasing irrigation levels. Increasing irrigation levels improved corn yields, but reduced the quality. On the other hand, increasing nitrogen doses had positive contributions both to yield and quality characteristics.

The current trial was conducted to study the effect of maturity on the potential nutritive value, methane production and condensed tannin of Sanguisorba minor hay. Sanguisorba minor hay harvested at three different maturity stages (pre-flowering, flowering and seeding stages). Sanguisorba minor hay was shade dried and analyzed for chemical composition. Gas and methane productions of Sanguisorba minor hay were determined at 24 h incubation time. Maturity had a significant effect (P<0.05) on the chemical composition, gas production, methane production metabolisable energy (ME) and organic matter digestibility (OMD). Neutral detergent fiber (NDF) and acid detergent fiber (ADF) of Sanguisorba minor hay increased with advancing maturity whereas crude protein (CP) and ash content decreased. The CP contents of Sanguisorba minor hay varied between 6.7 and 20.7%. The NDF and ADF contents of Sanguisorba minor hay ranged from 36.2 to 54.5 and 17.4 to 36.2 % respectively. The condensed tannin content of Sanguisorba minor hay varied with maturity between 0.4 and 1.6 % and decreased (P<0.05) with increasing maturity. The gas and methane production at 24 h incubation ranged from 32.2 to 43.5 ml and 4.6 to 6.5 ml respectively and decreased (P<0.05) after flowering. The ME and OMD of Sanguisorba minor ranged from 7.0 and 9.3 MJ/kg DM and 46.9 to 63.2% respectively and decreased (P<0.05) with each increment of the maturity. In conclusion, maturity had a significant effect on the nutritive value of Sanguisorba minor hay. The nutritive value of Sanguisorba minor decreased with increased maturity. It can be suggested that Sanguisorba minor should be grazed or harvested at pre-flowering and flowering stage since these stage provides hay with high ME and CP for ruminant. Keywords: Sanguisorba minor hay, Nutritive value, Condensed tannin, In vitro gas production, Methane production Olgunlaşma Döneminin Çayır Düğmesi Otunun Potansiyel Besin Değerine, Metan Üretimine ve Kondense Tanen İçeriğine Etkisi ÖzetYürütülen bu çalışmanın amacı, olgunlaşma döneminin çayır düğmesi otunun potansiyel besleme değerine, metan üretimine ve kondense tanen içeriğine olan etkisini araştırmaktır. Çayır düğmesi otu üç faklı olgunlaşma döneminde (çiçeklenme öncesi, çiçeklenme ve tohum bağlama) hasat edilip, gölgede kurutularak kimyasal kompozyonu için analizler yapılmıştır. Yirmi dört saatlik ünkibasyon sonunda çayır düğmesi otunun gaz ve metan üretimi belirlenmiştir. Olgunlaşma dönemi, çayır düğmesi otunun kompozisyonuna, gaz üretimine, metan üretimine, metabolik enerji ve organik madde sindirim derecesine önemli derecede (P<0.05) etki etmiştir. Olgunlaşma dönemin ilerlemesiyle nötral deterjan fiber ve asit deterjan fiber oranı artarken ham protein ve kül içeriği azalmıştır. Çayır düğmesi otunun ham protein içeriği %6.7 ile 20.7 arasında değişmiştir. Çayır düğmesi otunun nötral deterjan fiber ve asit deterjan fiber içeriği sırasıyla %36.2 ile 54.5 ve %17.4 ile 36.2 arasında değişmiştir. Çayır düğmesi otunun kondense tanen içeriği ise %0.4 ile 1.6 arasında de...