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Nutritive Value Of Pastures In Kars District I. Botanical And Nutrient Composition At Different Stages Of Maturity, İsmai̇l Kaya, Ahmet Öncüer, Yücel Ünal, Sedat Yildiz
Nutritive Value Of Pastures In Kars District I. Botanical And Nutrient Composition At Different Stages Of Maturity, İsmai̇l Kaya, Ahmet Öncüer, Yücel Ünal, Sedat Yildiz
Turkish Journal of Veterinary & Animal Sciences
The objectives of this study were to examine the botanical composition and determine the nutritive value of pastures in 9 different locations in Kars district with respect to stages of maturity. Samples were collected bi-weekly from 21 May to 30 July 1999. The Gramineae, Leguminoseae and other plant families constituted 64.2, 22.8 and 13.0% of the plant population, respectively. There was a variation in the nutrient composition of samples collected from different locations (P < 0.05). Average dry matter (DM) content was 28.8% and concentrations of organic matter (OM), crude protein (CP), crude fiber (CF), neutral detergent fiber (NDF), nitrogen-free extract (NFE), ether extract (EE) and ash on a DM basis were 90.8, 15.3, 30.0, 57.6, 43.4, 2.0 and 9.2%, respectively. Stage of maturity altered nutrient composition (P < 0.5). Concentrations of OM, NFE and ash did not change, CP linearly decreased, and CF and NDF quadratically increased with advancing maturity. In conclusion, the Gramineae were the predominant flora of pastures in northeastern Turkey. Moreover, mathematical models developed to characterize changes in the nutrient composition of pastures with advancing maturity may help to improve current feeding strategies.
Nutritive Value Of Pastures In Kars District Ii. Degradation Kinetics In The Rumen With Respect To Stages Of Maturity, İsmai̇l Kaya, Sedat Yildiz, Selma Kaya, Ahmet Öncüer
Nutritive Value Of Pastures In Kars District Ii. Degradation Kinetics In The Rumen With Respect To Stages Of Maturity, İsmai̇l Kaya, Sedat Yildiz, Selma Kaya, Ahmet Öncüer
Turkish Journal of Veterinary & Animal Sciences
This study was conducted to determine the ruminal degradation characteristics of nutrients with respect to pasture stage of maturity in Kars district. The nutritional parameters were dry matter (DM), organic matter (OM), crude protein (CP) and crude fiber (CF). Samples were collected from pastures of 9 vicinities of Kars district over a 28-day interval. Three adult Morkaraman rams were fitted with a rumen cannula and samples were incubated in the rumen for 4, 8, 16, 24 and 48 h. Parameters for degradation kinetics included readily degraded fraction, slowly degraded fraction, lag phase and fractional rate of passage. The cumulative disappearance …