Effect Of Different Nitrogen Treatment On Absorption Of Nitrogen And Yield And Quality Of Beet

The studied material was sugar beet cultivars KWS9167, studied on five nitrogen levels (0,50,100,150 and 200kg/hm2) and different application of nitrogen (dressing ration of 3:7 and 4:6, after manuring carried out in the early of foliage rapid growth stage) would affect the dry matter accumulation, the change of nitrogen accumulation, photosynthetic indexes and other physiological factors. Analyzed the correlation among the nitrogen application rate with yield and sugar content. In order to improving the nitrogen use efficiency and applying the nitrogen reasonable. The main results showed as follows:1. when the dressing ration of 4:6, the yield and the sugar content are higher than the other. The quadratic fitting equation shows that the nitrogen amount of 147.57kg/hm2 would make the maximum yield, and the nitrogen amount of 119.95 kg/hm2 would meet the maximum sugar content.2 The nitrogen fertilizer amount of 150 kg/hm2 and the dressing ration of 4:6, promoted the sugar beet dry matter accumulation significantly. The dry matter quality of sugar beet was the maximum in the sugar content accumulated stage.3.In different nitrogen conditions, the biggest nitrogen accumulating rate occurred on the foliage rapid growth stage. Compared with the two dressing rations, the nitrogen accumulation would be more when the dressing ration of 4:6 than the other.4. In different nitrogen conditions, chlorophyll content, photosynthetic rate (Pn), transpiration rate (Tr) and stomata conductance (Gs) were all expressed in single peak curve. Comparing with the two dressing rations, the indicators showed that the fertilization for dressing ration of 4:6 better than the dressing ration of 3:7.