Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

1 st WorkshopXIII International Feed Technology SymposiumThere was significant variation of NFE in lucerne silages was result of the carbohydrateadditives used. Maize plant silage without additive had the lowest amount of NFE,which is result of the intensive fermentation and the use of fermentable carbohydratesfor organic acid synthesis. For that reason all silages had lower NFE compared with thestarting material.Significant variations of mineral matters were observed only in lucerne silages becauseof carbohydrate additives.The highest pH values were observed in lucerne silages (Table 3), which was expectedconcerning the high buffering value of that plant and its previous wilting [4]. Whencarbohydrate additive and inoculant were used there was significant decrease in pHvalue in lucerne silage. Adding urea to the whole plant maize silage resulted insignificant increase of pH values. In spite of that, such silages had pH values within theoptimum range [7].The use of inoculants in maize cob silages resulted in furtherdecreases of pH values, below the optimum range.Table 3. Parameters of biochemical changes in silagesTreatments pHAcids, g/kg DMNH 3 -N,AceticButyricg/kg N LacticF B T F B TLucerne 5.02 a 156.17 a 41.45 b 9.53 b 42.58 a 52.11 ns - - -Lucerne + 50g/kg maize 4.96 b 106.84 b 45.17 b 11.25 b 38.30b a 49.55 ns - - -mealLucerne +inoculant4.78 c 107.52 b 58.72 a 16.32 a 32.18 b 48.50 ns - - -Whole maizeplant3.83 b 69.73 b 52.38 a 15.56 a 7.18 ns 22.74 ns - - -Whole maizeplant + 5 4.12 a 332. 25 a 36.04 c 11.87 b 8.25 ns 20.12 ns - 3.88 3.88g/kg ureaWhole maizeplant + 2 3.85 b 24.41 c 41.28 b 10.13 b 8.34 ns 18.47 ns - - -g/kg zeoliteMaize cob 3.88 a 56 a 28 b 7 a 3 b 10 ns - - -Maize cob +inoculant3.63 b 42 ab 37 a 6 a 5 a 11 ns - - -Maize cob +organozeolite3.96 a 47 b 30 b 3 b 6 a 9ns - - -Statistical significance (P)A ** ** ** * * * - * *B ** ** ** * * ns - * *a,b,c Values in same column for same plant material with different letter is significantlydifferent (P 0.05) ns = no significance. S – free, B – bonded, T – total.The pH value and dry matter content are most important factors that dictate theproteolysis intensity, but they cannot completely stop it [3]. The amount of ammonianitrogen in relation to total nitrogen is the first and fundamental indicator of the degree149