果树长大以后,长势会变差,一方面与树龄老化有关,另一主要原因是土质太硬,根系难以扩展。以前解决这个问题的办法是人工扩穴,费时费力不说,还伤根严重。后来,柳林县枣农在枣树上采用了一种炮震松土法,现在已推广到苹果树、梨树、核桃树等大型树种,较好地解决了果园土硬的问题。 Growing up after the fruit trees, the growth will deteriorate, on the one hand and the aging of the tree, the other main reason is that the soil is too hard, difficult to expand the roots. The solution to this problem in the past was to increase artificial pressure points, time-consuming and labor-intensive, and serious injuries. Later, jujube farmers in Liulin County adopted a gun-shattering method on dates, which has now been extended to large tree species such as apple tree, pear tree and walnut tree, which has solved the hard problem of orchard soil.