控混肥减量基施对直播杂交籼稻稻米产量和品质及效益的影响OA

To investigate the effects of different controlled-release blended fertilizers(CRBFs)on rice yield and grain quality in sandy loam soils of the ancient Yellow River course in northern Jiangsu,a field experiment was conducted using hybrid indica rice'Shenyou Yuehesimiao'as test material.Five fertilization treatments were established,including Hansfeng slow-release blended fertilizer(T1),three custom-formulated CRBFs(T2-T4),and conventional fertilization(CK).Comprehensive evaluations of yield components and grain quality parameters were performed,along with correlation analyses of starch viscosity properties.Key findings demonstrated that one-time basal application of custom CRBFs(T2-T4)significantly increased grain yield by 2.53％-8.25％compared to CK,with T3 treatment showing optimal performance.This yield enhancement primarily resulted from synergistic improvements in grains per panicle,seed-setting rate,and 1000-grain weight.Regarding processing and appearance quality,T2 and T3 treatments significantly increased brown rice rate,milled rice rate,and head rice rate,while reducing chalkiness degree and chalky grain rate.For palatability,T1-T3 treatments exhibited lower protein content and amylose content,corresponding to improved taste values.CRBF treatments notably modified RVA profiles,showing higher peak viscosity,hot paste viscosity,and breakdown viscosity,along with lower setback and consistency values.Correlation analysis revealed significant associations between RVA profile characteristics and milled rice rate,chalkiness degree,and amylose content.Economic benefits analysis revealed that T3 treatment achieved 22.30％higher net income than CK,attributable to both yield increase and reduced fertilizer costs.These results demonstrated that optimized CRBF application with reduced nitrogen input(particularly the T3 treatment)in sandy loam rice production systems of northern Jiangsu's ancient Yellow River course,could simultaneously enhance yield,improve grain quality,reduce cost and increase economic returns,demonstrating significant potential for widespread adoption and application.