Bioscience Evidence 2026, Vol.16, No.4, 291-303 http://bioscipublisher.com/index.php/be 299 flavor improvement. These findings indicate that precise fertigation management is essential for improving blueberry quality under subtropical production conditions. Figure 3 The effect of NH4 +-N: NO3 −-N levels on flower induction (A) and fruit setting percentage (B) in blueberry. Results are presented as the mean (n=4) and the bars above columns represent the standard deviation (SD). Different letters above the bars indicate significant differences (p< 0.05) (Adopted from Anwar et al., 2024) 5.5 Southwest China production area Yunnan Province has become one of the fastest-growing and highest-quality blueberry production areas in southwestern China in recent years. The region combines low latitude, high altitude, large day-night temperature differences, and strong solar radiation, creating favorable conditions for sugar accumulation and anthocyanin formation. As a result, Yunnan has become an important production base for premium blueberries in China. Zeng et al. (2020) compared blueberry quality from several Yunnan production areas, including Shigu, Yinqiao, Yousuo, Haikou, and Longpeng. Blueberries from Yunnan consistently showed higher sweetness and greater accumulation of bioactive compounds than those from low-altitude eastern regions. Among these sites, Longpeng showed the highest anthocyanin content, reaching 1.34 mg cyanidin-3-glucoside g⁻¹ FW, while several Yunnan production areas also ranked highly in total flavonoid and total phenolic contents. These results demonstrate the advantages of southwestern high-altitude environments for improving blueberry nutritional quality. In recent years, the blueberry industry in Yunnan has rapidly developed toward large-scale facility production and standardized management. Major production areas such as Honghe, Lijiang, and Shilin have widely adopted substrate cultivation, smart fertigation systems, and standardized production technologies. These production systems have contributed to fruit characteristics including high sugar content, good firmness, and rich anthocyanin accumulation, while gradually improving the competitiveness of Yunnan blueberries in domestic and export markets. 6 Future Perspectives 6.1 Development of high-quality blueberry production The future development of the blueberry industry will gradually shift from yield-oriented production toward quality-oriented production, with fruit quality becoming a key indicator of industry competitiveness. As consumers increasingly focus on flavor, nutrition, and health benefits, blueberry production should not only aim to increase yield but also consistently produce high-quality fruit with elevated levels of anthocyanins, phenolics,
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