Abstract:In order to reasonably evaluate the effect of NutrientExpert(NE)on double-cropping rice inChina,a seriesof field experiments were conducted in Jinxian county,Jiangxi Province from 2014 tO2016.There treatments wereNE,farmer habits(FP)and soil testing from the local agricultural technical department(ST).Riceyield,nutrientuptake,fertilizer amounts and partial factorproductivity(PFP)were analyzed.The results showedthat:1)NE treatmentsignificantly increased grain yield and nutrients uptake of early and laterice(except for2014).In 2015 and2016,the yield of NE treatment was increased by 15.17%~ 32.74% and 14.33%~ 19.25% than FP treatment in early and laterice,respectively.Compared withFP,the nitrogen uptake of NE treatment was increased by 25.16%~ 33.21% and 22.09%~ 26.82% in early and laterice,respectively.The phosphorus uptake were increased by 27.45%~ 29.57% and 27.02%~38.60%,potassium uptake were increased by 16.59%~ 22.34% and 14.24%~16.21%.2)Compared withFP treatment,the nitrogen fertilizer of NE were decreased by 24.86%~ 29.15% and 28.15%~ 34.43% in early and laterice,respectively.The phosphate fertilizer were decreased by 15.97%~ 37.05% and 31.72%~44.75%.The potassium fertilizer was decreased by 60.35%~ 66.22% and 72.29%~74.02%,respectively.3)Compared with FP treatment, the PFP of nitrogen fertilizer in NE treatment was increased by 53.26%~ 83.41% and 48.77%~81.86%,respectively. The PFP of phosphorus fertilizer were increased by 57.97%~ 76.31% and 66.24%~115.83%respectively.The PFP of potassium productivity were increased by 113.25%~ 156.13% and 160.88%~206.00%,respectively.Therefore,NE could achieve the goal of chemical fertilizer reduction and synergism in double cropping rice.