Abstract: This study focused on effect of gramineae-legume mixed sowing on its agronomic and quality traits for triticale and peas, and selection of the suitable planting mode for the Qaidam Basin. It has important guiding significance for alleviating the supply-demand contradiction of forage in this region. The results showed that, compared to single sown, the mixed sowing extended the growth period of triticale by 2d. Under the mixed sowing ratio of Qingsimai 2+Qingjian 1 (P2S2) was 0.7∶0.3, the tillering number per plant increased by 4.50%, 69.69% and 44.99%, compared with that of the control (P2S1), and the same mixed sowing ratio groups of Qingsimai 1＋Qingjian 1（P1S2）and Qingsimai 6＋Qingjian 1（P3S2）, respectively. The dry grass yield of P2S2 combination increased by 17.61% compared with that of the P2S1. The crude protein, crude fat, calcium, and phosphorus content of the forage showed an increasing trend under different mixed sowing combinations of grass and beans. Using the grey relational comprehensive evaluation method, the mixed sowing of Qingsimai 2 and Qingjian 1 (0.7∶0.3) showed the excellent performance of agronomic and quality traits. This treatment was the best suitable cultivation mode for mixed sowing of triticale and peas, and there was greater potential for promoting and applying in Qaidam Basin.

Key words: triticale, pea, mixed sowing mode, productivity, comprehensive evaluation