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山楂的花芽为混合芽。春季混合芽萌发后,先抽生结果新梢,随着结果新梢的抽生,花序即露出(花序着生在结果新梢顶端),当结果新梢加长生长停止后,花序即分离开花。山楂开花后,其花序座果数与单果重或单果体积之间矛盾不大(不同于苹果),因此生产中一般都采用花期喷赤霉素(九二○)提高花序座果率和花序座果数的办法来提高产量和质量。生产实践证明,这种在负载量不加控制,植株处于超负荷生长的情况下,大小年现象是非常严重的。生产实践也证明,只有在调整花序留量的基础上喷赤霉素,才能克服大小年,提高产量和质量,实现既壮树又丰产。
Flower buds of hawthorn for mixed buds. After germination of the spring mixed buds, the new shoots are first drawn, and the inflorescences emerge with the pumping of the new shoots (inflorescences are born at the top of the new shoots). When the new shoots grow longer, the inflorescences are separated and flowered. Hawthorn after flowering, the number of inflorescence fruit and fruit weight per unit volume or inconsistency (unlike the apple), so the production are generally used flowering gibberellin (920) to increase inflorescence fruit rate and inflorescence seat Fruit number to improve yield and quality. Production practice has proved that in the uncontrolled load, plants in the case of overloaded growth, the size of the year phenomenon is very serious. Production practice also proves that only by adjusting the inflorescence reserve on the basis of gibberellin in order to overcome the size of the year, increase production and quality, to achieve both strong tree and high yield.