International Journal of Horticulture, 2024, Vol.14, No.1, 1-10 http://hortherbpublisher.com/index.php/ijh 7 supply in the soil. The enhanced soil structure and permeability help nutrients distribute more evenly in the soil, making it easier for plants to access the required nutrients. This more efficient nutrient supply further elevates yields. Subsoiling treatment also has a significant impact on the quality of sweet potatoes. By improving soil permeability, the risk of waterlogging and root rot during sweet potato growth is reduced, leading to fewer instances of rot, deterioration, and damage. This contributes to the production of more high-quality sweet potatoes, increasing the market value of agricultural products. Therefore, subsoiling treatment not only positively affects the yield of sweet potatoes but also brings about a significant improvement in their quality. This, in turn, enhances agricultural production efficiency and provides more high-quality agricultural products. 4.3 Impact of subsoiling treatment on stress resistance of sweet potato Due to its ability to enhance soil moisture retention and promote root growth depth, subsoiling treatment strengthens the resilience of sweet potatoes under drought conditions. It enables them to more effectively withstand water scarcity, mitigating the adverse effects of drought on yield. Subsoiling treatment improves soil drainage, allowing sweet potatoes to better resist waterlogging during heavy rainfall or excessive irrigation. This helps reduce the risk of root rot and plant suffocation caused by waterlogging. Subsoiling treatment has a positive impact on the growth and yield of sweet potatoes. By increasing root growth depth, improving yield and quality, and enhancing drought resistance and waterlogging tolerance, it makes a significant contribution to the sustainable production of sweet potatoes and agricultural success. The application of subsoiling treatment is expected to continue providing an essential soil management tool for agricultural production, especially in the context of climate change and resource management. 5 Potential Mechanisms and Factors When studying the impact of subsoiling treatment on soil permeability and sweet potato growth, there are numerous potential mechanisms and factors to consider. These factors can help explain how subsoiling treatment affects both soil and crops, providing valuable insights for improving field management. 5.1 Impact on soil microbial communities Subsoiling treatment may alter the rate of organic matter decomposition in the soil. Increased soil permeability and oxygen supply can stimulate microbial activity in the soil, accelerating the breakdown of organic matter and thereby providing nutrients essential for plant growth. Subsoiling treatment contributes to symbiotic interactions between plant roots and soil microorganisms. Certain microorganisms aid in nutrient absorption by plants, such as nitrogen-fixing bacteria, which can form symbiotic nitrogen-fixing nodules around the roots (Harindintwali et al., 2020). 5.2 Impact of soil nutrient status The subsoiling treatment can influence the effectiveness of nutrients in the soil. By improving soil permeability, subsoiling treatment helps reduce nutrient leaching and accumulation, providing an appropriate nutrient supply. Some subsoiling treatment methods, such as adding gypsum, can adjust the soil pH, improving the suitability of acidic or alkaline soils and benefiting nutrient absorption by plants. 5.3 Interaction between subsoiling treatment and climatic factors Subsoiling treatment may have an impact on soil moisture management. Increasing soil permeability contributes to drainage, reducing the risk of waterlogging during periods of drought or heavy rainfall. Improving soil permeability can also influence the temperature distribution in the soil. In cold regions, subsoiling treatment may help raise soil temperature, favoring the early growth of crops. Subsoiling treatment could also enhance the stress resistance of crops, improving the growth environment of roots and nutrient supply makes crops more resilient to drought, salinity, and other adverse conditions.
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