杏幼树生长势旺，不易成花。1997年在河南许昌进行了环剥促花试验。供试品种有二红杏、串枝红、银白否和黄吨谷，株行距3m×4m，树龄3年生，主干疏层形树形。每品种环剥4株，1殊不环剥作对照。5月20日上午（当日天气晴朗）在主干上距地面20～30cm处环剥，剥口定1．5mm（干径5cm Apricot saplings grow prosperous, not easy to spend. 1997 in Xuchang, Henan, a girdling flower test. There were two cultivars of red apricot, red string twig, silver yellow and yellow tons of no, spacing 3m × 4m, tree age 3 years, the main sparse layer tree-shaped. Galloping per plant 4 strains, 1 special ring for the control. On the morning of May 20 (the weather is fine on the day), stripping 20 to 30 cm above the ground on the trunk, peeling should be 1.5 mm (dry diameter 5 cm