With socio-economic development,energy crisis has become a serious problem in the world. As a potential substitute plant for fossil fuel and a renewable energy,Jatropha curcas has been attracted particular attention. In this paper,a comparative study was made on the leaf nitrogen allocation,photosynthesis,biomass accumulation and allocation,and seed yield of nine J. curcas populations,aimed to provide references for enlarging the planting of this species and for breeding new varieties. The results showed th...