This study aimed to determine the value of honey source on Robinia by analyzing flower morphology and nectar characteristics in floral nectar of eight selected individuals. The mean nectar volume secreted by genus Robinia was 1.7 ± 1.0 µL. Among the samples, PR (R. margaretta) and HR (R. pseudoacacia) secreted the highest and lowest nectar volumes—3.0 ± 1.1 and 1.1 ± 0.7 µL, respectively. The mean sugar concentration was 44.8 ± 6.1% (range, 40.1–51.4%). The ANOVA results revealed a statistically significant difference in nectar volume and sugar concentration among the eight individuals (p < 0.05). The free sugar content ranged from 0.39 (HR) to 0.78 (KR) mg/μL, and nectar sugar contents ranged from 0.31 (HR) to 1.53 (PR) mg per flower. The sucrose/hexose ratio ranged from 0.5 to 3.6, and sucrose was high in all samples. The results of the Kruskal-Wallis H test revealed significant differences in free sugar content (mg/µL), nectar sugar content per flower and sucrose/hexose ratio (p < 0.05). There were close correlations between nectar characteristics and flower morphology as followed; 1) nectar volume and nectar sugar content per flower (r = 0.976), 2) nectar volume and calyx length (r = 0.952), 3) sugar concentration in nectar and length of inflorescence (r = 0.952). Asparagine was the most abundant (average; 60.2%) amino acid, followed in decreasing order by alanine (6.9%), glutamine (5.2%), and serine (4.7%). The results of Kruskal-Wallis H tests showed that the rate of amino acids of alanine, glutamine, glutamic acid, and arginine significantly differed among the samples (p < 0.05).

本研究旨在通过分析八个选定个体的花形态和花蜜中的花蜜特征来确定刺槐的蜜源价值。刺槐属分泌的平均花蜜量为 1.7 ± 1.0 µL。样本中，PR（R. margaretta）和HR（R.pseudoacacia））分泌的花蜜量最高和最低——分别为 3.0 ± 1.1 和 1.1 ± 0.7 µL。平均糖浓度为 44.8 ± 6.1%（范围：40.1–51.4%）。方差分析结果显示，八个个体的花蜜量和糖浓度存在统计学显着差异（p < 0.05）。每朵花的游离糖含量范围为0.39（HR）至0.78（KR）mg/μL，花蜜糖含量范围为0.31（HR）至1.53（PR）mg/μL。蔗糖/己糖比率范围为0.5至3.6，并且所有样品中蔗糖含量都很高。Kruskal-Wallis H 测试的结果显示游离糖含量 (mg/μL)、每朵花的花蜜糖含量和蔗糖/己糖比率存在显着差异 (p < 0.05)。花蜜特性与花朵形态之间存在着密切的相关性：1）每朵花的花蜜量和花蜜糖含量（r = 0.976），2）花蜜量和花萼长度（r = 0.952），3）花蜜中的糖浓度和花序长度（r = 0.952）。天冬酰胺是最丰富的氨基酸（平均为 60.2%），其次是丙氨酸（6.9%）、谷氨酰胺（5.2%）和丝氨酸（4.7%）。Kruskal-Wallis H 检验结果表明，样品中丙氨酸、谷氨酰胺、谷氨酸和精氨酸的氨基酸比率存在显着差异（p < 0.05）。谷氨酰胺（5.2%）和丝氨酸（4.7%）。Kruskal-Wallis H 检验结果表明，样品中丙氨酸、谷氨酰胺、谷氨酸和精氨酸的氨基酸比率存在显着差异（p < 0.05）。谷氨酰胺（5.2%）和丝氨酸（4.7%）。Kruskal-Wallis H 检验结果表明，样品中丙氨酸、谷氨酰胺、谷氨酸和精氨酸的氨基酸比率存在显着差异（p < 0.05）。