红壤低产田土壤特点、低产原因及改良OA

Red soil group soils(including red soil,yellow soil,and latosol)distributed in mountainous,hilly,platform,and mound regions of tropical and subtropical China are characterized by such drawbacks as heavy texture,compact soil structure,shallow plow layer,low organic matter content,nutrient deficiency,strong acidity,poor permeability,and high drought susceptibility.These soil limitations have severely constrained crop yields,thus necessitating urgent soil improvement practices to break the yield bottleneck,boost agricultural productivity and farmers'income,and achieve efficient land utilization.Available amelioration measures include the application of organic fertilizers,rational chemical fertilization,lime amendment,integrated soil utilization and conservation strategies,optimized crop rotation and inter-cropping systems,as well as appropriate tillage practices to accelerate soil maturation.Implementation of these integrated measures can effectively improve the physical and chemical properties of red soils,significantly enhance soil fertility,and promote substantial crop yield increases.This comprehensive soil improvement approach has proven to be scientifi-cally sound and practically feasible,providing robust technical support for the steady fertility enhancement of low-yield red soil fields,sustainable agricultural intensification,and long-term agroecosystem sustainability.