几种植物生长调节剂和叶面肥在山楂上的应用一、赤霉素（ＧＡ）：山楂花期喷施５０×１０－６赤霉素，可极显著地提高座果率，增大果个，较对照增产４８．１％，提高含糖量，但Ｖｃ有所降低，对花芽形成有明显减少，故生产上使用时，一定要配合肥水等其它技术措施，同时，... Application of several plant growth regulators and foliar fertilizer on hawthorn GA3: sprayed with 50 × 10-6 gibberellin at the flowering stage of hawthorn could increase the fruit setting rate significantly, , 48.1% more yield than the control, increase the sugar content, but Vc decreased, the formation of flower buds decreased significantly, so when used on the production, we must cooperate with fertilizer and other technical measures, at the same time, ...