１９９０年葡萄冻害发生时期是元月２０日至２月１０日之间，调查得知田间总体受害指数为３７．８％。主要成因是土壤持续低温造成了根系冻害、气温骤变造成了蔓基冻害。受害后进行的葡萄促根试验表明：用人为断根加ＮＡＡ或ＡＢＴ生根粉溶液灌根的方法，可使受害株根系的发新根能力由５％提高到８０％以上。 Grapefruit in 1990 occurred during the period January 20 to February 10 between the survey found that the field overall victimization index was 37.8%. The main cause is caused by the continuous low temperature soil root frost damage, sudden changes in temperature caused by vine-based frost damage. The results of grape root promotion after victimization showed that the method of root pruning with artificial root pruning plus rooting powder solution of NAA or ABT can increase the rooting capacity of the damaged root from 5% to more than 80%.