关键词: 燕麦, 箭筈豌豆, 混播比例, 生育期, 混合青贮, 品质

Abstract: To explore the suitable growth phase,the ratio of mixed sowing and mixed storage of forage oat (Avena sativa)/common vetch (Vicia sativa) for the mixed silage for the winter fallow field in Sichuan,this experiment used 'Baler’ oat and 'Chuanbei’ common vetch as raw materials,and set 1:0 (T1)，3:1 (T2),1:1 (T3),1:3 (T4),0:1 (T5) five mixed sowing ratios,in oat heading stage/common vetch flowering stage,oat flowering stage/common vetch pre-podding stage,oat milk-ripe stage/common vetch post-podding stage were cut then mixed as silage,and the silage was sampled and analyzed after fermented for 60 days. The results showed that among the three growth stages,the pH and proportion of ammonia nitrogen/total nitrogen of mixed silage at the oat heading /common vetch flowering phase were the lowest (P<0.05),and the highest contents of lactic and acetic acid in mixed silage at oat flowering /common vetch pre-podding phase (P<0.05). Among the five mixed sowing ratios,T4 had a lower content of neutral detergent fiber,acid detergent fiber and starch,and a higher crude protein content than T1,T2,and in T3;the pH,proportion of ammonia nitrogen/total nitrogen was lower than those of other groups,and the content of lactic acid was higher than that of T1,T2,T5 groups. In summary,for winter fallow fields in Sichuan,the best silage quality would be obtained when the oats and common vetch were mowed with a ratio of 1:3 and harvested at the oat flowering and the common vetch at the early stage of podding.

Key words: Oat, Common vetch, Mixing sowing ratio, Growth phase, Mixed silage, Quality