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枣树(Zizyphus jujuba Mill.)秋季叶施尿素、乙烯利及尿素十乙烯利均可促进叶片及落性枝的氮素向树体回流,增加树体贮藏氮素水平,尤以尿素+200ppm乙烯利的效果最佳;尿素及乙烯利处理均增加了次年枣吊长度、平均单果重及枣果还原糖含量;尿素处理还显著增加了叶片及新梢含氮量,座果数,但降低了枣果蔗糖含量。枣树秋冬季地上部与根系具有同等重要的贮藏氮素作用;蛋白态氮是主要贮藏形态,为非蛋白态氮的2—3倍。
Jujube (Zizyphus jujuba Mill.) Autumn leaves with urea, ethephon and doetilide urea can promote leaves and branches of the nitrogen flow back to the tree, increasing the level of nitrogen storage of trees, especially urea + 200ppm ethylene The results showed that urea and ethephon increased the length, average fruit weight and the reducing sugar content of jujube fruit in the next year. The urea treatment also significantly increased the nitrogen content and fruit number of leaves and shoots, but decreased Jujube fruit sugar content. The shoots and roots of jujube trees had the same important nitrogen storage effect in autumn and winter. Protein nitrogen was the main storage form, which was 2-3 times of non-protein nitrogen.