Crop chemical regulation using plant growth regulators(PGRs)represents a key strategy for achieving high-efficiency cotton production in China.This review synthesizes four decades of research on mepiquat chloride(MC),...Crop chemical regulation using plant growth regulators(PGRs)represents a key strategy for achieving high-efficiency cotton production in China.This review synthesizes four decades of research on mepiquat chloride(MC),an inhibitory PGR pivotal to optimizing cotton growth architecture,stress resilience,and yield-quality parameters.We detail MC's stage-specific roles—from root development and flowering acceleration to canopy optimization and assimilate partitioning—and its mechanistic interactions with hormones(e.g.,gibberellin suppression,cytokinin enhancement)under biotic/abiotic stresses.Furthermore,we conceptualize MC deployment into three evolutionary tiers:(1)symptom-guided remedial application,(2)systemic growth-stage programming,and(3)integrated management with agronomic practices.These paradigms,supported by field validation across China's cotton belts,offer a roadmap for precision regulation.Future advancements in nano-formulations,digital agriculture,and PGR synergism are discussed to unlock next-generation yield frontiers.展开更多
Gas-solid flows are ubiquitous in industrial systems.The coupled model of the discrete element method(DEM)and computational fluid dynamics(CFD)is one of the techniques for the simulation of the gas-solid flows.To enha...Gas-solid flows are ubiquitous in industrial systems.The coupled model of the discrete element method(DEM)and computational fluid dynamics(CFD)is one of the techniques for the simulation of the gas-solid flows.To enhance the applicability of the DEM-CFD method,the coarse graining DEM has been developed to simulate large-scale powder systems.The coarse graining DEM is a scaling law model and hence can simulate large-scale systems using a smaller number of particles than the actual one.Although the coarse graining DEM enables to effectively simulate large-scale powder systems on a single PC,visualized image is lack of reality due to reduced spatial resolution.Here a novel visualization method is developed to produce realistic images.In the proposed technique,the virtual particles are located by considering the motion and location of the coarse grain particles.To show the adequacy of the proposed method,two types of visualization based on the computational results are made:a blow-up of powder due to injected gas flow and a spouted bed.In these systems,the visualized images are shown to be improved by the proposed visualization technique.The effectiveness of the proposed method is proved by the agreement of the images based on the calculation results between the standard DEM-CFD method and coarse graining DEM.展开更多
基金supported by the National Key Research and Development Program Projects of China(2024YFD2300600)the China Agriculture Research System(CARS-15-16)。
文摘Crop chemical regulation using plant growth regulators(PGRs)represents a key strategy for achieving high-efficiency cotton production in China.This review synthesizes four decades of research on mepiquat chloride(MC),an inhibitory PGR pivotal to optimizing cotton growth architecture,stress resilience,and yield-quality parameters.We detail MC's stage-specific roles—from root development and flowering acceleration to canopy optimization and assimilate partitioning—and its mechanistic interactions with hormones(e.g.,gibberellin suppression,cytokinin enhancement)under biotic/abiotic stresses.Furthermore,we conceptualize MC deployment into three evolutionary tiers:(1)symptom-guided remedial application,(2)systemic growth-stage programming,and(3)integrated management with agronomic practices.These paradigms,supported by field validation across China's cotton belts,offer a roadmap for precision regulation.Future advancements in nano-formulations,digital agriculture,and PGR synergism are discussed to unlock next-generation yield frontiers.
基金supported by JSPS KAKENH1 Grant Number 19J22534.
文摘Gas-solid flows are ubiquitous in industrial systems.The coupled model of the discrete element method(DEM)and computational fluid dynamics(CFD)is one of the techniques for the simulation of the gas-solid flows.To enhance the applicability of the DEM-CFD method,the coarse graining DEM has been developed to simulate large-scale powder systems.The coarse graining DEM is a scaling law model and hence can simulate large-scale systems using a smaller number of particles than the actual one.Although the coarse graining DEM enables to effectively simulate large-scale powder systems on a single PC,visualized image is lack of reality due to reduced spatial resolution.Here a novel visualization method is developed to produce realistic images.In the proposed technique,the virtual particles are located by considering the motion and location of the coarse grain particles.To show the adequacy of the proposed method,two types of visualization based on the computational results are made:a blow-up of powder due to injected gas flow and a spouted bed.In these systems,the visualized images are shown to be improved by the proposed visualization technique.The effectiveness of the proposed method is proved by the agreement of the images based on the calculation results between the standard DEM-CFD method and coarse graining DEM.
