Research progress and outlook on intelligent water-fertilizer integration regulation system for greenhouse crops

China's agriculture development is facing multiple challenges, including tightening resource constraints, rising labor costs, and increasing environmental pressures．Against this backdrop, intensive production methods utilizing greenhouse facilities have seen rapid development, driving transformation and upgrading of traditional agriculture toward digitalization and intelligentization has become an inevitable trend in modern agricultural development．As modern agriculture hallmark, characterized by efficient water and fertilizer conservation, labor and resource savings, and controllable environmental factors, water-fertilizer integration regulation system for greenhouse crops has not only achieved breakthroughs in algorithm optimization and model construction but has also developed iterative upgrades in smart equipment．A systematic review and summary of relevant research findings has been conducted, aiming to provide a solid theoretical foundation for exploration and development in precision agriculture, thereby accelerating transformation and sustainable development of smart agricultural technologies from technical research to practical application．