Impact of Foliar Microelement Fertilizer Application on Seed Yield of Bromus inermis
This study examined the effect of foliar application of three microelement fertilizers(zinc,Zn;manganese,Mn;and boron,B)at varying concentrations on Bromus inermis cv.Wusu No.1 during the booting,heading,and initial bloom stages.A comprehensive evaluation using subordinative function values was employed to assess seed yield and its components in B.inermis,aiming to identify the optimal microelement fertilizer,application timing,and concentration combination.The results showed that micro-element fertilizer application at different growth stages significantly affected seed yield and its components.Notably,compared to the control,spraying 0.25%B solution at the heading stage resulted in the greatest inflorescence length increase(by 13.89%).Applying 0.05%B solution at the heading stage produced the highest number of florets per spike(increased by 10.84%).Foliar applying 0.05%Mn at the booting stage yielded the most spikelets per plant(increased by 23.07%),while the same concentration at the ini-tial bloom stage led to the greatest increases in seeds per spike(increased by 29.50%),thousand-seed weight(increased by 17.14%),and seed yield(increased by 23.42%).Based on the comprehensive evalu-ation,the optimal fertilization regime was determined to be foliar application of 0.05%Mn fertilizer at the initial bloom stage,demonstrating a significant positive effect on seed yield.These findings provide a scien-tific foundation for optimizing seed yield practices in B.inermis.
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