高寒地区两份垂穗披碱草材料饲用品质的比较

为培育适应高寒地区的抗逆、高产、营养品质优异的垂穗披碱草（Elymus nutans）新品种，获取优良的种质资源，本研究对垂穗披碱草高蛋白新品系QE36的饲用性状进行了连续两年的观测，并对其蛋白质季节动态和构成蛋白质的氨基酸组分特征进行了深入研究。结果表明，垂穗披碱草材料QE36饲用品质性状表现稳定，且粗蛋白和酸性洗涤纤维含量显著优于当地广泛分布的野生垂穗披碱草材料（本文编号为GE07）；整个生育期，垂穗披碱草粗蛋白质含量表现为降低趋势，且QE36粗蛋白含量均高于对照GE07，并在抽穗期至孕穗期差异显著（P<0.05）；垂穗披碱草材料QE36的18种氨基酸含量显著高于对照GE07，且必需氨基酸含量是对照的1.6倍。因此，QE36可以作为优异的高蛋白垂穗披碱草种质材料。

Comparison of two Elymus nutans germplasms in alpine region on forage productivity and property

In order to cultivate a new cultivar with resistance, high yield, and excellent nutritional quality, and get excellent plant resources, feeding traits of high protein new germplasm of Elymus nutans had been observed for two continuous years. The seasonal dynamics of protein content and characteristics of amino acid components have been studied. The results showed that feeding quality of QE36 performed steadly, and nutritional quality traits (high protein, low fiber) were significantly superior than that of control (GE07). In the whole growth period, the content of crude protein reduced, and the crude protein content of QE36 was higher than that of GE07, and had significant differences from heading stage to booting stage. In early flowering, the content of amino acid composition in material QE36 was significantly higher than that of GE07, and the essential amino acid content was 1.6 times of GE07. In conclusion, QE36 could be served as an excellent high protein Elymus nutans germplasm materials.