Abstract: In order to explore the best fertilization ratio of Bromus inermis seed production in the arid area of Ningxia,the “3414” fertilization design was adopted for a random block experiment. The effects of different N (Nitrogen),P(Phosphorus),and K(Kalium) ratios on the yield and quality of B. inermis seed were studied,and the grey correlation degree was used for comprehensive analysis and evaluation,to provide a theoretical basis for efficient production of B. inermis seed in the arid area of Ningxia. The results showed that the ratio of N,P,and K had significant effects on seed yield,components,and seed quality traits of B. inermis (P<0.05). The actual seed yield of N₂P₂K₂ treatment was the highest,reaching 2 308.89 kg·hm^-2,which was 53.98% higher than that of the N₀P₀K₀ treatment. N₂P₂K₂ treatment had the highest seed germination rate,germination index,and vigor index among all treatments,and the germination potential of N₂P₂K₂was only second to that of N₀P₂K₂. The number of reproductive branches per unit area and spikelets per inflorescence was the main factors affecting the actual seed yield,and both played a direct role in the contribution of seed yield. Through the comprehensive evaluation of grey correlation and multiple regression function,it was concluded that the application rates of N,P,and K were 90,105 and 60 kg·hm^-2 (N₂P₂K₂),respectively,which was the best ratio to achieve high yield and quality of B. inermis,and could be popularized and applied in arid areas of Ningxia.

Key words: Bromus inermis, Fertilization effect of “3414”, Harvested seed yield, Comprehensive evaluation

摘要： 为探究宁夏干旱区无芒雀麦(Bromus inermis Leyss)种子生产最佳施肥配比，采用“3414”施肥设计进行随机区组试验，研究了不同氮(Nitrogen，N)、磷(Phosphorus，P)、钾(Kalium，K)配比对无芒雀麦种子产量和质量的影响，利用灰色关联度进行综合分析评价，以期为宁夏干旱区无芒雀麦种子高效生产提供理论依据。结果表明，N，P和K配比对无芒雀麦种子产量及构成因素、种子质量均有显著影响(P<0.05)，其中N₂P₂K₂(氮、磷和钾的施肥量分别为90，105和60kg·hm^-2)处理的实际种子产量最高，达2308.89kg·hm^-2，较对照N₀P₀K₀(不施肥)处理显著增产53.98%；N₂P₂K₂处理种子发芽率、发芽指数和活力指数最高，发芽势仅次于处理N₀P₂K₂(氮、磷和钾的施肥量分别为0，105和60kg·hm^-2)；单位面积生殖枝数和每花序小穗数是影响实际种子产量的主要因素，且均对种子产量的贡献起直接作用。经灰色关联和多元回归函数综合评价得出，氮、磷和钾的施肥量分别为90，105和60kg·hm^-2是无芒雀麦实现高产的最佳配比，可在宁夏干旱区推广应用。

关键词: 无芒雀麦, “3414”施肥效应, 实际种子产量, 综合评价