| From 2006 to 2008, in order to explore nitrogen application techniques on super high yielding wheat cultivation in Huaibei area， researches have been carried out on the effect of the proportion of different nitrogen based fertilizer to quantity, quality and nutrient content in the plants, with strong gluten wheat Jimai 20, Yannong19 and Wanmai 50 in the condition of ultra high yielding cultivation （with more than 9 000kg/ha）. The results showed that if the ratio of basal and topdressing nitrogen ranged from 10∶0 to 4∶6, with 307.5 ~ 322.5kg nitrogen per hectare (among which 270 kg nitrogen from chemical fertilizer), the grain yield, grain number, weight of 1000 grain of Jimai 20, Yannong 19 and Wanmai 50, increased with more nitrogen applied in the jointing stage, and showed a significant and positive correlation or quadratic curve correlation. In addition, quality indexes, such as protein, wet gluten, sedimentation value also improved in the same condition. The nitrogen content in the plants of Yannong19 and Wanmai 50 became lower with the growing process, with the maximum at the tillering stage and the minimum at the mature stage. In conclusion, the most appropriate way of nitrogen application techniques on super high yielding wheat cultivation in Huaibei area is that to applye 40% ~ 50% nitrogen as the basal and to apply 50% ~ 60% nitrogen at jointing stage. On the other hand, it was difficult for the traditional “one off” way to achieve yield level of 9000 kg per hectare. |
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