Rumen degradability and intestinal digestibility of rumen undegraded protein from lucerne and pasture sward

摘要

The chemical composition and nutritive value of forages may vary considerably and depend on plant species and variety, rate of fertilization, rainfall, maturity and time of grazing or harvesting. These factors also influence the rate and extent of ruminal and intestinal digestion and, therefore, nutrition value. The INRA-88 system of ruminant nutrition has been introduced into practice in Poland, The results, however, are not always satisfactory may be because there is not enough data on the nutritive value of Polish feedstuffs, expressed in INRA units.