Plant Population Coordination Science: Mechanisms, Emergence, and Applications of Group-Level Behaviors in Agricultural Ecosystems

For a long time, traditional crop science and plant physiology have primarily focused on the physiological responses, gene expressions, and morphological shaping of individual plants. However, in actual field production environments, crops never exist as isolated individuals. Instead, they construct a coordinated system with group-level emergent properties through complex underground root interactions, airborne chemical signal exchanges, adaptive resource allocation, and subsurface microbial networks. This paper systematically proposes the frontier theoretical framework of "Plant Population Coordination Science" in agronomy, exploring how individual plants within the same farmland ecosystem form self-organized group behaviors through multi-medium interactions. Starting from four core mechanisms—underground root spatial architecture, rhizospheric and atmospheric chemical signaling (volatile organic compounds and root exudates), subterranean mycorrhizal/bacterial symbiotic networks, and population-level resource competition and compensation—this study analyzes the emergent features of plant populations in light interception, nutrient and water scheduling, pest and disease defense, and stress mitigation. The findings demonstrate that shifting the paradigm from "individual optimization" to "population coordination optimization" can break through the physiological yield limits of single plants, providing solid theoretical support and innovative practical pathways for modern high-density planting, intercropping system designs, and intelligent farmland population regulation.