Effects of Reduced Nitrogen Application on Nitrogen Utilization and Grain Quality in Different Organs of Spring Wheat
In order to investigate the appropriate nitrogen amount of spring wheat in eastern Hebei province,"Jinqiang 11"spring wheat was utilized as the study material,and four levels of nitrogen application were established,the effects of 0(N0),80(N80),160(N160),and 240 kg/ha(N240)on spring wheat processing quality,organ growth,nitrogen accumulation,and organ transport were examined.The results showed that nitrogen reduction was beneficial to the accumulation and transport of nitrogen in the later stage of wheat,and the contribution rates of post flowering nitrogen to grain were 29.63％and 28.53％when nitrogen reduction was reduced to N80 and N160,which was significantly higher than that of N240(18.23％).The highest nitrogen accumulation levels were 5.04,10.35 and 143.73 kg/ha in the sheaths,stems and grains of N80 at the later growth stage of wheat,respectively.Nitrogen use efficiency,nitrogen agronomic use efficiency,nitrogen physiological use efficiency and nitrogen partial productivity of grain were N80＞N160＞N240.When nitrogen was reduced to N80,the grain water content and wet gluten content reached the maximum values,and protein content was the highest at N160 treatment,which could improve the quality of wheat in later processing.Considering the above factors,it is suggested that 80-160 kg/ha is the best nitrogen application rate for spring wheat planting in eastern Hebei Province.
Spring wheatNitrogen accumulation and transportNitrogen fertilizer utilization rateProcessing quality
万方数据
维普
