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茌梨全氮水平年中有一次大的高峰和两次小的高峰。同期,幼龄组织较老龄组织含量高。新梢开始生长含量较低。旺盛新梢氮含量特别高,随新梢停止生长,氮水平迅速下降。旺树氮含量较弱树高。同一组织不同时期氮素水平不一。芽萌动期短梢和细根含量最高,开花期花朵含量最多,新梢生长期以新梢和其上的叶片最多,秋季以叶片和根系的含量最高,而冬季枝条和根系含量最多。
Pear total nitrogen level in the year there is a big peak and two small peaks. Over the same period, younger age groups than the high content of aging. Shoots begin to grow at lower levels. The nitrogen content of the exuberant shoots is particularly high, with the shoot growth stopped, the nitrogen level decreased rapidly. Mongolian tree nitrogen content is weaker tree height. The same organization at different periods of different levels of nitrogen. The shoots had the highest shoots and fine roots at the germinating stage, the highest at the flowering stage, the shoots and leaves at the shoot growing stage, the leaves and roots at autumn and the branches and roots at winter.