Influence of Different Cutting Dates on Cornell Net Carbohydrate and Protein System (CNCPS) Parameters and the Fatty Acid Compositons of Caramba Hay (Lolium multiflorum cv. caramba)

The aim of the study was to determine the influence of different cutting dates on Cornell Net Carbohydrate and Protein  System insert ignore into journalissuearticles values(CNCPS); parameters and the fatty acid insert ignore into journalissuearticles values(FAs); compositons of caramba hay insert ignore into journalissuearticles values(Lolium multiflorum cv caramba);.  The samples were taken from the five randomized plots at the three different cuts insert ignore into journalissuearticles values(first cut:before blossom, second  cut:blossom 50%, and third cut:after blossom);. The samples were analyzed including the crude protein insert ignore into journalissuearticles values(CP);, ether  extract insert ignore into journalissuearticles values(EE);, CP fractions insert ignore into journalissuearticles values(A= NPN, B1= fast, B2= intermediate, B3= slow and C= not fermented and available for the  animal);, degradable intake protein insert ignore into journalissuearticles values(DIP);, undegradable intake protein insert ignore into journalissuearticles values(UIP); and the FAs compositions insert ignore into journalissuearticles values(C14:0, C16:0,   C18:0, C18:1, C18:2 and C18:3);. The CP, EE and A1 fraction were negatively affected by the different cutting dates  insert ignore into journalissuearticles values(P<0.05);, while the B2, B3 and C fractions were increased by growing stage insert ignore into journalissuearticles values(P<0.05);. Different cutting dates affected  total major FAs, and decreased the concentration of C18:3 insert ignore into journalissuearticles values(P<0.05); and increased those C16:0 insert ignore into journalissuearticles values(P<0.05); and C18:2   insert ignore into journalissuearticles values(P>0.05);. A positive strong linear relation was found between the C18:3 and CP contents in caramba hay insert ignore into journalissuearticles values(R2= 0.769,  P<0.001);. The study showed that CP, soluble protein insert ignore into journalissuearticles values(A+B1 fraction); and C18:3 were significantly decreased, the other  crude protein fractions insert ignore into journalissuearticles values(B2, B3 and C); and other major FAs insert ignore into journalissuearticles values(C16:0 and C18:2); were increased by growing stage.