年近来,我国果树种植面积迅速扩大,但由于北方地区冬季气候寒冷干燥,春季又多风少雨,对果树的越冬有很大影响。以往,针对一、二年生的幼树常采用整株伏倒埋土防寒。效果很好。但三年生以上的幼树通常采用筑防护墙、用秸杆、塑料膜包扎的方法虽效果不错,但费工费料,不宜大面积推广。最近,我们采用凡士林加熟猪油涂抹枝干,进行防寒越冬,简便易行,效果 In recent years, the planting area of ​​fruit trees in our country has rapidly expanded. However, due to the cold and dry winters in winter in northern China and the windy and rainy days in spring, winter planting of fruit trees has a great impact. In the past, one or two year-old young trees often use the whole plant fall buried cold. good results. But more than three-year-old saplings are usually used to build protective walls, straw, plastic film dressing method, although the effect is good, but the labor costs of materials, should not be large-scale promotion. Recently, we use petrolatum plus lard smear branches, cold winter, easy, effect