Molecular Soil Biology 2025, Vol.16, No.2, 55-62 http://bioscipublisher.com/index.php/msb 58 can decide when to water and how much according to the real-time data of soil moisture. This not only saves water, but also ensures that the yield of flowers will not be reduced (Gurjar et al., 2023). 5 Effects of Different Irrigation Strategies on the Quality of C. morifolium 5.1 Sensory quality The sensory performance of Hangbai Chrysanthemum, such as its color, shape, and neatness, is significantly influenced by irrigation methods. For example, irrigating with water with high salt content can make flowers smaller and their colors less vibrant, which can affect the overall viewing effect (Amarin et al., 2021). To maintain consistency in the shape and size of flowers, the water tension in the soil needs to be well controlled (De Farias and Saad, 2011). If the soil is too dry, the stems and inflorescences may become shorter and smaller, but in most cases, the quality of the flowers can still meet the sales standards. 5.2 Active component accumulation The irrigation method can also affect the amount of active ingredients in Hangbai Chrysanthemum, such as flavonoids, volatile oils, and total phenols. Gurjar et al. (2023) found that irrigating with wastewater can increase the organic matter and trace elements in the soil, which can help increase the content of medicinal ingredients in plants. If the water used for irrigation has a high salt content, it may affect the normal physiological activities of plants and lead to a decrease in the active ingredients (Amarin et al., 2021). Choosing a good water source and controlling irrigation methods are crucial for enhancing the medicinal value of Hangbai Chrysanthemum. 5.3 Flower drying characteristics Different irrigation methods can also affect the moisture content and drying speed of Hangzhou white chrysanthemum flowers. Scientific management of irrigation during the planting process can not only promote good flower growth, but also stabilize the quality of dried flowers. If the soil is too dry, both the fresh and dry weight of flowers will decrease, and the drying performance will also deteriorate. Saline irrigation can reduce the relative moisture content of flowers, which may affect their performance during the drying process and ultimately affect the quality of dried flowers (Amarin et al., 2021). 6 Effects of Different Irrigation Strategies on the Stress Resistance of C. morifolium 6.1 Drought resistance Under water-saving irrigation conditions, Hangbai Chrysanthemum exhibits stronger drought resistance. A study has found that spraying Robinin and Chitosan can make Hangbai Chrysanthemum more drought tolerant. These treatments can increase the moisture content of the leaves and improve the efficiency of photosynthesis. The chlorophyll content will also increase accordingly, and important substances such as carbohydrates, proline, potassium, and calcium in the plant body will also increase, helping the plant regulate water (Elansary et al., 2020). These treatments can also increase the activity of some antioxidant enzymes, such as superoxide dismutase (SOD), peroxidase (POD), and ascorbate peroxidase (APX), further enhancing drought resistance. The use of exogenous melatonin (MT) is also effective. It can enhance the level of photosynthesis during drought, allowing plants to maintain a high water content, while also improving the activity of antioxidant enzymes and osmotic regulation ability, enhancing drought resistance (Luo et al., 2023). Through these methods, more drought tolerant varieties can also be screened for future planting (Sun et al., 2013). 6.2 Disease resistance Different irrigation methods can also affect the disease resistance of Hangzhou white chrysanthemum, especially against common diseases such as powdery mildew and leaf spot. Appropriate irrigation can alleviate the pressure on plants, make them more vibrant, and thus help reduce the risk of diseases (Elansary et al., 2020; Luo et al., 2023). Although there is not much research on the impact of irrigation on disease incidence, existing studies suggest that optimizing irrigation to make plants grow healthier, such as enhancing antioxidant capacity and improving nutritional status, may lower their chances of disease. 6.3 Environmental adaptability In areas with unstable climate conditions, the effectiveness of irrigation strategies is crucial for the successful
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