Abstract: Abstract: The study was designed two types of fertilizers and two ways of fertilizations for comparative research, and analyzed the variations of available N in the different treatments using randomized blocks design, in order to finding the best way of fertilization, the maximum water and nitrogen utilization and decreasing the environmental pollution. The result showed that, there were significant variations between the different fertilizers and the different fertilizations, respectively. 1 Compared SRCF (Slow-release and compound fertilizer) with CCF (general compound fertilizer) at the same total nutrient content, the yield and the N agronomic efficiency, the N apparent efficiency, the N physiological efficiency increased by 27.69%~28.71%, 40.24%~42.05%, 4.18%~5.26%, 34.58%~34.95%, respectively; 2 Compared SAF(Spring application fertilizer) with AAF（Autumn application fertilizer），there was no significant variation in yield, N efficiency ,etc. 3 In 0-60cm soil layer, the available N content of CCF was higher than that of SRCF in seedling stage, but the jointing stage was in contrast. The available N of soil was decreased with the plant growing, and the peak of available N appeared 0-20cm soil layer by SAF, but 20-40cm soil layer appeared by AAF. 4 The available N content of two types of fertilizers had significant variation in 0-60cm soil layer in seedling stage, but after jointing stage, it was no significant variation. 5 The available N mainly existed in 0-60cm soil layer, and the lowest point was in 60cm soil layer. Below the 60cm soil layer, it was rebounded.