沈阳农业大学研制的山楂丰收素,1988年经我省辽阳、宽甸、清原等15个县在山植生产中推广应用,普遍反映具有增产、优质、耐贮、壮树的效果.为了提高山楂坐果率,过去生产中多采用花期喷布赤霉素的方法,效果很好.但是,由于赤霉素只有提高坐果率的单一效应,在一些土质瘠薄的果园连年使用,往往出现树势减弱,花芽量减少的现象.为此,沈阳农业大学在研制山楂丰收素的配方过程中,针对山楂开花坐果的生理特点,在选用赤霉素的基础上,又增加了磷、钾、硼等元素.因而,使用山楂丰收素与赤霉素相比,不仅在提高坐果率方面具有相似的效果,同时,又有叶面喷 Hawthorn harvest developed by Shenyang Agricultural University, in 1988 by the province Liaoyang, Kuandian, Qingyuan 15 counties in mountain plant production in the promotion and application, generally with the yield, quality, storage and strong tree effect.In order to improve the hawthorn However, since gibberellin has only a single effect of increasing the fruit setting rate, it tends to be weakened in some infertile orchards after years of continuous use, Therefore, Shenyang Agricultural University, in the process of formulating hawthorn balsamin, aims at the physiological characteristics of flowering and fruiting of hawthorn on the basis of the selection of gibberellin, adding phosphorus, potassium, boron and other elements. Thus, the use of hawthorn compared with gibberellin, not only in improving the rate of fruit set has a similar effect, while foliar spray