Abstract: This study used Bromus inermis as the experimental material and applied manganese fertilizer combined with different concentrations of γ-polyglutamic acid (γ-PGA) at the early flowering stage. A systematic analysis was conducted on the chlorophyll content (SPAD value), soluble sugar and starch contents, as well as the yield components and seed yield of Bromus inermis. The results showed that the seed yield components, including the number of florets per spike, the number of seeds per spike, the number of spikelets per plant, the number of seeds per plant, thousand-seed weight, and seed yield, increased by 2.94% to 16.47%, 6.86% to 16.67%, 8.26% to 31.39%, 44.98% to 67.37%, 8.40% to 12.47%, and 19.61% to 27.98%, respectively, with the highest seed yield reaching 623.97 kg·hm-2. After the application of manganese fertilizer combined with γ-PGA, the SPAD value in the leaves of Bromus inermis increased, ensuring more effective photosynthesis and the accumulation of more organic matter. Soluble sugars and starch accumulated and transferred in the source and sink organs, prioritizing the growth and development of reproductive organs. Based on comprehensive evaluation, it was found that spraying 0.05% Mn + 1.5% γ-PGA at the early flowering stage of Bromus inermis could effectively increase the seed yield.

Key words: Bromus inermis, Manganese fertilizer, Poly-γ-glutamic acid, Yield components, Seed yield

摘要： 本研究以无芒雀麦(Bromus inermis)为试验材料，在初花期叶面喷施锰肥配施不同浓度γ-聚谷氨酸(γ-PGA)处理，对无芒雀麦的叶绿素含量(SPAD值)、可溶性糖和淀粉含量，以及产量构成因子和种子产量进行了系统的分析。结果表明：包括单穗小花数、单穗种子数、单株小穗数、单株种子数、千粒重和种子产量在内的种子产量构成因子分别提升2.94%~16.47%，，6.86%~16.67%，，8.26%~31.39%，，44.98%~67.37%，，8.40%~12.47%和19.61%~27.98%，其中种子产量最高为623.97 kg·hm^-2。锰肥配施γ-PGA后无芒雀麦叶片内SPAD值升高，保证其更有效地进行光合作用而积累更多有机物质，在源、库器官中可溶性糖和淀粉发生积累转移，优先保证生殖器官的生长发育。基于综合评价表明，在无芒雀麦初花期喷施0.05% Mn+1.5%γ-PGA，能够有效提高无芒雀麦的种子产量。

关键词: 无芒雀麦, 锰肥, γ-聚谷氨酸, 产量构成因子, 种子产量