秋天到了,红艳艳的苹果压弯了枝头,又迎来了一个丰收年。大家可以想象,生产那么多硕果要消耗苹果树多少营养物质啊?确实,经过一年的结果,苹果树确有些亏了、累了。为了恢复树势,做到连年丰产,必须 Autumn is coming, the red apples bend the branches, and usher in a harvest year. We can imagine that the production of so many fruits to consume apple tree how much nutrients ah? Indeed, after a year’s results, apple trees do have some loss, tired. In order to restore the tree vigor, achieve year after year high yield, must