Spraying growth regulators in later dormant period with GA3 and 6-BA made the starch content reduce quickly and increased the content of soluble sugar sharply, but ABA had no effect.

• 10、外源生长调节剂也影响了主要呼吸基质的含量：外源GA3、6-BA引起花芽中淀粉含量迅速降低，可溶性糖含量迅速升高，但ABA的影响效应不显著。