Study on Soil Water Migration Patterns Under Multiple Irrigation Events in Gynostemma Longipes Plantations

作     者：Li, Doudou Qin, Fengyuan Wen, Dingmei Gan, Jiaxia Sun, Chao Cao, Feng Wang, Chenchen Guo, Baolin 

作者机构：Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicines Ministry of Education Institute of Medicinal Plant Development Chinese Academy of Medical Sciences Peking Union Medical College Beijing China Tianjin University of Traditional Chinese Medicine Tianjin China Ankang Zhengda Pharmaceutical Co. Ltd. Ankang China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Irrigation 

摘      要：Clarifying the changes in soil water related parameters in irrigation event can help optimize the design of irrigation systems and formulate irrigation strategies, which have been widely applied in agriculture and forestry. However, as a commonly used traditional medicinal plant that prefers humid environments, field water migration patterns of Gynostemma longipes has not yet been reported. Therefore, this study focused on the one-year G. longipes as the research object and established a plantation in its real estate area, Ankang City, Shaanxi Province. We studied the dynamic changes in soil water migration characteristics (radius of saturated water, horizontal and vertical migration distance), soil water potential, and environmental factors of multiple irrigation events inG. longipes plantations. Furthermore, we constructed and validated the model of soil water potential based on soil horizontal migration distance. We found that the soil horizontal and vertical migration distance reached 15 cm and 24 cm respectively when irrigation was stopped, which remained stable with different irrigation events (environmental changes). The parameters of soil water migration characteristics and soil water potential over time could be quantitatively described (R2 0.94), and the quantitative relationships varied with changes in environmental factors. In addition, soil water potential could be simulated through easily measurable soil horizontal migration distances during and after stopping irrigation (R2 0.92). Subsequently, we successfully predicted the variation pattern of soil water potential under the condition of variable dripper flow rate (R2 0.68). In summary, our findings enrich the relevant theories of soil water migration patterns and provide new ideas for obtaining soil water potential in the field. The results can also provide theoretical support and technical guidance for field water management of G. longipes and similar plants. © 2024, The Authors. All rights res