Bioscience Methods 2025, Vol.16, No.4, 218-227 http://bioscipublisher.com/index.php/bm 220 of different nutrients in different parts of the field, but also allows plants to better absorb nutrients, thereby improving the quality of fruits (Silva et al., 2024; Singh et al., 2024). If the results of soil and plant analysis are used in conjunction with a decision support system, the accuracy of fertilization recommendations and the best time to fertilize can be further improved (Chen et al., 2014; Lu et al., 2022).Taizhou Huangyan Pingtian Fengling Bayberry Professional Cooperative, based on more than ten years of Bayberry planting practice, has concluded that fertilization to the roots should be stopped 25 to 30 days before the fruit matures. However, when the leaf color turns white, foliar fertilizer should be applied to fully utilize leaf photosynthesis to supply nutrients to the fruit. This type of Bayberry has better quality and taste. 3.2 Controlled-release fertilizers and timing optimization Controlled-release fertilizers and the timing of fertilization are very important to ensure that crops can absorb enough nutrients as needed. For example, nanofertilizers, coated fertilizers, and some fertilizer technologies that can be released slowly can make nutrient supply more stable, reduce fertilizer loss, and improve utilization efficiency (Munir et al., 2024). If these technologies are used in conjunction with variable fertilization and integrated water-fertilizer systems, fertilizers can be delivered to the roots on time when crops need nutrients, which can not only help the fruit continue to grow, but also reduce the impact on the environment (Dilshika et al., 2024). In addition, predictive models and time analysis tools can also help us arrange fertilization plans more scientifically to adapt to changes in different weather and crops (Xing and Wang, 2024). 3.3 Integration of remote sensing and geospatial tools in fertilization planning Remote sensing and geospatial technologies are now also being applied to fertilization planning, changing the past single management approach. High-resolution images taken by satellites and drones, such as multispectral images, thermal imaging, and radar images, combined with machine learning algorithms, can clearly show changes in soil properties, crop health, and nutrient distribution (Avola et al., 2024; Gheorghe et al., 2025). These technologies allow us to use variable rate fertilization technology (VRT) to accurately place fertilizers where and when they are needed according to the actual conditions of different locations. Remote sensing technology can also be combined with different interpolation methods to improve prediction accuracy while preserving the differences in fertilization management in different places (Radočaj et al., 2022; Nie et al., 2024). The use of these digital tools not only improves resource utilization, but also increases yields and reduces environmental impact (Fue et al., 2025). 4 Regulatory Strategies for Enhancing Fruit Quality 4.1 Use of Plant growth regulators (e.g., GA, ABA) in fruit development phases Plant growth regulators (PGRs), such as gibberellins (GA) and abscisic acid (ABA), are critical for regulating fruit quality. Substances such as ABA, jasmonic acid, and brassinolide can promote the increase of anthocyanins after external spraying, making the fruit better in color and higher in nutritional value. Regulators such as ethylene, auxin, cytokinin, and GA not only affect the synthesis of anthocyanins, but also affect other aspects of fruit quality such as size, firmness, and sweetness. Different application times, concentrations, and methods will affect the final effect, and improper use may cause problems, such as causing plant physiological disorders (Hajam et al., 2018; Wang et al., 2022). Therefore, understanding the mechanism of action of these regulators in regulating gene expression and metabolism will help us use them more scientifically and efficiently in fruit tree cultivation (Chen et al., 2020; Rafiq et al., 2025). 4.2 Water management techniques coupled with nutrient regulation Water regulation is also important, especially regulated deficit irrigation (RDI), which is a good way to find a balance between yield and quality. Studies have shown that moderate RDI can increase fruit weight, firmness, and sugar, soluble solids, and pigment content, thereby improving the nutrition and taste of the fruit. If water management and precise nutrient regulation are combined, resources can be used more efficiently, helping the fruit to develop better while maintaining the sustainability of production. These measures can be used together to save water without reducing quality, and can even improve fruit quality, which is especially useful in water-scarce areas (Xu et al., 2024).
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