Abstract: The typical erect\|panicle rice variety Shennong 265 and half\|erect\|panicle rice variety Liaojing 294 were used to study the influence of N fertilizer on grain yield， dry matter accumulation and distribution through field experiment. It was shown that the yield of Liaojing 294 was higher than that of Shennong 265 at low N level， whereas the result was reversed at higher N level. Dry matter accumulation of Liaojing 294 was larger than that of Shennong 265 from tiller stage to heading stage， whereas the result was reversed form heading stage to harvest. Increased N application could improve the maximum dry matter accumulation rate， and advance the beginning time for the highest dry matter accumulation rate. Compared with Liaojing 294， the maximum dry matter accumulation rate of Shennong 265 was lower， and the time when the maximum accumulation and rapid accumulation rate appeared was postponed.

Key words: erect panicle rice, the maximum accumulation rate, heading stage