Effects of Nitrogen Phosphorus and Potassium Nutrient Management on Winter Wheat Grain Filling Characteristics and Yield under Straw Returning Conditions
To investigate the effects of crop straw returning and nutrient management on the grain filling characteristics and yield of winter wheat,using'JM22'as the test variety,three experimental treatments were set up,T1 was optimized nitrogen,phosphorus,and potassium nutrient management,T2(CK)was traditional treatment,T3 was crop straw returning nutrient alternative treatment.This study investigated the effects of different experimental treatments on the accumulation and transport of dry matter in winter wheat,grain-filling related parameters,grain yield and economic benefits.The results showed that compared with the control,the T1 treatment significantly increased the allotment amount and contribution rate of dry matter in the grains after anthesis,increased by 43.46％and 20.88％respectively;it also improved the maximum grain filling rate(Gmax)and average grain filling rate(Gmean),with an increase of 17.62％and 3.09％respectively;it also increased the number of grains per ear,thousand-grain weight,and grain yield,by 5.72％,4.51％,and 12.15％respectively.It is recommended that in areas with similar natural environment and production conditions to this experiment,the optimization of nitrogen,phosphorus and potassium nutrient management is an effective way to take into account both yield and economic benefits.
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