关键词: 牧草, 产量, 品质

Abstract:

In order to investigate the differences of yield and quality among different forage grass varieties, the several quantity and quality indices of annual ryegrass(Lolium perenne), triticale(Triticale hexaploide), oat(Avena sativa) and Elymus nutans(Elymus nutans) were measured at the Haibei Alpine Meadow Ecosystem Research Station(HBAMERS), a field station of the Northwest Institute of Plateau Biology, Chinese Academy of Sciences. The results showed that the hay yield of triticale was 1345.50 g·m^-2, significantly higher than that of annual ryegrass(974.93 g·m^-2), Elymus nutans(301.75 g·m^-2) and oat(329.60 g·m^-2); and there was no significant difference between Elymus nutans and oats. The hay yield of triticale was 4~4.5 times higher than that of Elymus nutans and oat, and 1.4 times higher than that of annual ryegrass. The crude protein content of Elymus nutansis was significantly higher than that of annual ryegrass and triticale(P< 0.05), followed by triticale, while ryegrass had the lowest content. The crude fat content of triticale was significantly lower than that of perennial ryegrass, Elymus nutans and oat. There was no significant difference in crude fat contents among annual ryegrass, Elymus nutans and oat. The yield per unit area of crude protein, crude fat, neutral detergent fiber or acid washing fiber were the highest in annual ryegrass(255.76 g·m^-2), significantly higher than that of the other three grasses, i.e. was 4~5 times higher than that of triticale, and 7~8 times higher than that of Elymus nutans and oats. The crude protein yields of Elymus nutans and oats were not significantly deviated. Ryegrass had the highest the content of acid detergent lignin, followed by Elymus nutans and triticale, and oats had the lowest one(P<0.05).

Key words: Forage grass, Yield, Quality