Field experiments were conducted in a high fertility paddy soils to determine the effects of nitrogen and potassium rates on grain yield,yield components as well as biomass production and distribution in super hybrid rice.Super hybrid rice cultivar Guiliangyou 2 was grown under three nitrogen rates( 172. 5kg / hm2,207. 0kg /hm2and241. 5kg / hm2N) and three potassium rates( 216 kg / hm2,288 kg /hm2 and 360kg / hm2K2O). A treatment without nitrogen and potassium application( N0K0) was taken as a check. The re...