Comprehensive evaluation of nutrient value for the winter and spring supplement feeding forages in the alpine pastoral area of Northwestern Sichuan

Through the entropy weight based entropy way, the gray related degree method was used to evaluate nutrient value of 6 supplement feeding forages synthetically. Results showed that the silage forage of Avena sativa variety Y61005 presented the highest nutrient value, which had the highest content of crude protein (CP), crude fat (EE), crude ash(ASH), calcium (Ca), and the least content of crude fiber(CF) and neutral detergent fiber (NDF). The withering grass of natural grassland and the straw of Elymus sibiricuson variety Chuancao NO.2 after seed harvested had lower nutrient value. In generally, the nutrient value of A.sativa forage was better than the E. Sibiricuson, and the silage forage was better than the hay. The A. sativa planting and ensiling technologies should be popularized in order to improve stockbreeding productivity in alpine pasture.