Abstract: In this study, Lespedeza potaninii Vass ‘Tenggeli’ seeds were used as the experimental materials, to determine the suitable methods to remove persistent sepals and break the hard seeds with different seed treatments. The results showed that all the persistent sepals were removed when the seeds were treated four times with the seed coat breaking machine and 12 minutes with concentrated sulphuric acid. All treatments can significantly increase the seed germination rate, germination potential, germination index and vigor index, and reduce the hard seed rate (P<0.05). After the seeds were processed with the seed coat breaking machine for 9 times, the germination rate is the highest (66.33%), and the germination potential, germination index and vigor index were also higher. The highest germination rate was above 80.00% by concentrated sulfuric acid treatment for 20~30 minutes, and the germination vigor, germination index and vigor index were also higher. In summary, concentrated sulphuric acid is a highly corrosive and strong mineral acid, it is a hazardous chemical, and there are safety risks in operation. the seed coat breaking machine can completely remove the persistent sepals by treating 4 times;9 times treatment can effectively reduce the seed hardness rate, the germination rate can reach more than 60.00%, and the operation is convenient and safe, thus can be recommended in the large-scale seed production.

Key words: Lespedeza potaninii Vass, Seed hardness, Persistent sepals, Seed treatment, Seed germination

摘要： 本研究以“腾格里”牛枝子（Lespedeza potaninii Vass.）种子为试验材料，研究了不同的处理方法对去除宿存萼片和破除种子硬实的影响，旨在明确牛枝子种子去除宿存萼片和破除硬实的方法。结果表明：种子破皮机处理4遍和浓硫酸处理12 min时，宿存萼片全部去除；所有处理均能显著提高种子发芽率、发芽势、发芽指数和活力指数，降低硬实率（P<0.05）；种子破皮机在处理9遍时，发芽率最高（66.33%），发芽势、发芽指数和活力指数也较高；浓硫酸处理20～30 min，发芽率最高在80.00%以上，发芽势、发芽指数和活力指数也较高。综上所述，由于浓硫酸是一种具有高腐蚀性的强矿物酸，属于危险化学品，生产中操作存在安全风险，而种子破皮机处理4遍可以完全去除宿存萼片，将种子处理9遍可以有效降低硬实率，发芽率可达60.00%以上，且操作方便和安全，易于规模化处理，建议在牛枝子种子生产中推广应用。

关键词: 牛枝子, 种子硬实, 宿存萼片, 种子处理, 种子萌发