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测定了冬枣强壮树、中庸树、弱树落果和正常果实内源生长素、赤霉素、脱落酸的含量。结果表明,冬枣在果实生长发育期均有落果发生,其2个落果高峰分别出现在7月底(生理落果)和9月底(采前落果);强壮树、中庸树、弱树正常果中生长素、赤霉素含量高于同类树同期落果的含量,强壮树、中庸树、弱树落果中脱落酸含量始终高于同类树同期正常果的含量。
The contents of endogenous auxin, gibberellin and abscisic acid in strong and deciduous tree of jujube, moderate tree, weak tree and normal fruit were measured. The results showed that winter jujube had deciduous fruit during the fruit growth and development stage, and the two deciduous fruit peak appeared at the end of July (Physiological deciduous) and the end of September (deciduous fruit before harvest) respectively. The strong, moderate and weak tree auxin Gibberellin content was higher than that of the same type of deciduous fruit during the same period. The content of abscisic acid in strong tree, moderate tree and weak tree was always higher than the normal fruit in the same kind of tree.