Abstract: Micro-climate of rice population is one of the most important factors on nitrogen utilization. Clarifing the micro-climate response of indicia rice population on nitrogen fertilizer can help to optimize the nitrogen fertilizer management and to enhance the nitrogen using efficiency in indicia rice field. R498, R816 and R499 were selected to represent dropping panicle, semi-erect panicle and erect panicle, respectively; 3 nitrogen fertilizer levels (N0: N 0 kg/hm²; N1: N 150 kg/hm²; N2: N 300 kg/hm²) were applied for each panicle type. Temperature, relative humidity and luminous of indicia rice population during heading stage and 20 days after full heading were measured at different positions under different nitrogen fertilizer treatments, by Temperature & Humidity Data Logger (TP1000) and Luminometer (TASI-8720). Responsive characters of micro climate on nitrogen fertilizer were investigated by comparing temperature, relative humidity and light intensity of different panicle types at different positions of indicia rice populations. The results showed that: ① With the increase of nitrogen fertilizer, the temperature at upper, middle and lower position of indicia rice population all increased after decreasing; the response of micro climate on nitrogen fertilizer was not only affected by nitrogen fertilizer but also impacted by position in indicia rice population. ② Relative humidity at upper, middle and lower position of indicia rice population all showed a significant difference among different nitrogen fertilizer treatments and among different panicle types during the full heading stage; Relative humidity at middle and lower position of indicia rice population both performed an increasing trend from N0 to N2 at 9:00-19:00, the relative humidity at upper position increased from N0 to N2 at 17:00 to 19:00. ③ The luminous intensity of indicia rice population showed a down trend from top to bottom in rice population, while its decreasing rate varied significantly, the decreasing rate of luminous intensity of R499 was significantly lower than R498 and R816. ④ The response index of micro-climate on nitrogen fertilizer of R498 and R816 both performed a down trend from top to bottom at N1 and N2 fertilizer treatment; the response index of microclimate of R499 on nitrogen fertilizer increased from top to bottom under N1 fertilizer treatment, while it was significantly lower at top than it at middle and bottom position. According these results, we conclude that the comprehensive response of micro-climate of erect panicle indicia rice on nitrogen fertilizer is better than dropping panicle indicia rice. The effective panicle and the grain yield of erect panicle indicia rice is higher than dropping panicle indicia rice, its agronomic efficiency of applied nitrogen and increase rate of grain yield by nitrogen also was higher than dropping panicle indicia rice under higher fertilizer treatment. Comparing with dropping panicle indicia rice, erect panicle indicia rice is more appropriate for high fertilizer. Therefore, we suggest farmers to plant erect panicle indicia rice in heavy fertilizer area or used more fertilizer in moderate fertilizer area.