Abstract: The field experiment with different water treatments and management methods, including traditional flooded cuhivafion(C1)，film mulched cultivation(C2)and uncovered cultivation(C3)，was conducted to investigate the effects of
cultivation model and nitrogen application on grain nutritional quality and phytic acid content for japonica rice，with 3 levels of nitrogen fertilizer(N1，0 kg／hm2；N2，124 kg／hm2；N3，150 kg／hm2) being designed for each wate rmanagement treatment．The results showed that C3 treatment(uncovered cultivation)had relatively higher total phosphorus content in rice grain，but much more decreasing phytic acid and in organic phosphorus contents compared with traditional flooded cultivation (C1)．For the same nitrogen level，total grain nitrogen and protein components of C3 treatment were lower than those of C2and C3 treatments，implying that a reasonable fertilizer and water management in paddy production could improve grain nutritional quality，especially increase grain protein contents an d decrease grain phytie acids．Additionally，the increasing application of nitrogen fertilizer should cause the remarkably enhancing accumulation of total phosphorus in rice grains．

Key words: cultivation pattern, nitrogen application, rice gain, nutritional quality, phytic acid