Replacing Chemical N Fertilizer by Manure Improves the Yield and Quality of Rice and Soil Fertility
This study aims to investigate the effects of replacing chemical N fertilizer by manure on rice growth and soil fertility.Field experiments were carried out with seven treatments:no fertilizer(T1),conventional fertilizer(T2),optimized fertilizer(T3),manure replacing 15%chemical N fertilizer(T4),manure replacing 30%chemical N fertilizer(T5),manure replacing 15%chemical N fertilizer under isonitrogen conditions(T6),and manure replacing 30%chemical N fertilizer under isonitrogen conditions(T7).The rice yield,yield components,nitrogen use efficiency,rice quality,and soil physicochemical properties in each treatment were determined.The results showed that compared with T3,replacing chemical N fertilizer with manure significantly increased the rice yield,and T7 had the best effect.Compared with T3,T5 and T7 increased the effective panicle number by 10.9%and 13.3%,respectively.Compared with T3,T7 increased the partial factor productivity and agronomic nitrogen efficiency of rice.Compared with T1,other treatments increased the head rice rate by 1.29%-2.87%.Compared with T3,T7 increased the rice protein content by 8.3%and it meanwhile increased the available nitrogen and available phosphorus in soil.In conclusion,replacing 30%chemical N fertilizer with manure under isonitrogen conditions is a fertilization mode suitable for application and popularization.
replacing chemical N fertilizer by manurechemical fertilizerriceyieldqualitysoil nutrients
万方数据
维普
