Abstract:

The paper aims to study the effect of soaking seeds with wood vinegar on the germination of forage seeds, and provide reference for the popularization and application of soaking seeds with wood vinegar. The seeds of Onobrychis viciifolia, Medicago sativa and Bromus inermis were used as experimental materials. The seed germination test was conducted by setting 9 treatments with 0% (distilled water control) and 0, 50, 100, 200, 300, 400, 500, 600 times dilution of wood vinegar to analyze the seed germination and seedling growth. The root length of Onobrychis viciifolia increased by 9.5% and the dry weight of 100 seedlings significantly increased by 20.9% (P<0.05) under the treatment of 300 times dilution of wood vinegar. Compared with the control, under the treatment of 400 times dilution of wood vinegar, the germination rate and germination potential of Medicago sativa were significantly increased by 22% and 21%, the germination index, vigor index and root length were increased by 20%, 22% and 18%, and the dry and fresh weight of 100 seedlings was increased by 30% (P<0.05). When Bromus inermis was treated with 500 times dilution of wood vinegar, the bud length was significantly increased by 8.4% (P<0.05). Soaking seeds in wood vinegar can effectively improve the bud length, root length, 100 seedling dry weight, and improve the germination and growth of forage seeds. The best treatments of soaking seeds for Onobrychis viciifolia, Medicago sativa and Bromus inermis are 300, 400 and 500 times dilution of wood vinegar, respectively.

Key words: wood vinegar, Onobrychis viciifolia, Medicago sativa, Bromus inermis, seed germination, germination index, seedling growth