Studies on the mixed effect of triticale variety Gannong No. 2 and vetch in alpine pastures of Gannan

The aim of the current study was to determine the best sowing mixture and sowing ratios of triticale (× Triticosecale Wittmack ‘Gannong No. 2’) with common vetch (Vicia sativa). The production performance and nutritional value of three vetch varieties (i.e., Lvjian 1, Lvjian 2, and Lvjian 431) and the triticale variety Gannong No. 2 were tested in different mixed sowing ratios (0 ꞉ 100, 20 ꞉ 80, 30 ꞉ 70, 40 ꞉ 60, 50 ꞉ 50, 60 ꞉ 40, 70 ꞉ 30, 80 ꞉ 20, and 100 ꞉ 0). A spilt-plot design was used in the experiment, where sowing mixtures were assigned to main plots, and sowing ratios were assigned to subplots. The results showed that the sowing mixture of Lvjian 431 and Gannong No. 2 triticale scored the highest performance for hay yield, nutritional value, and the comprehensive evaluation value (0.941 6); the sowing ratio of 50 ꞉ 50 had the best mixed broadcast effect among the mixed sowing ratios. The interaction showed that the mixed sowing treatment of Lvjian 431 and Gannong No. 2 triticale at a ratio of 50 ꞉ 50 scored the highest hay yield (11.15 t·ha⁻¹), the highest comprehensive evaluation value (0.832 1), high crude protein (CP) content (13.25%), and the highest mixed broadcast effect. These results will assist the scientific establishment and management of grass–legume mixed grasslands in Gannan alpine pasture areas.