Effect of nitrogen application on reconstruction of nitrogen compounds during the maturation stage in several field crops

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Abstract
The effect of nitrogen application on the process of nitrogen distribution and retranslocation during the maturation stage was investigated in the field for rice, spring wheat, maize, soybean and potato. Based on the above results, it is suggested that, though the amount of nitrogen accumulated in the plant increased and the pattern of nitrogen distribution changed with the level of nitrogen application, the mechanism for the reconstruction of the nitrogen compounds in the leaves and harvesting organs was stable regardless of the level of nitrogen application in all the crops.