核桃树是一种非常古老的树种,在我国已有两千多年的种植历史。这是一幅核桃树结果儿的照片。瞧,在树叶中间那绿绿的、圆圆的就是核桃。这些是核桃树生长情况的图片。核桃是怎么长出来的呢?先由花芽长出新梢,新梢开始往上长。叶片就像核桃树的“妈妈”,它为核桃树的发育提供养分 Walnut tree is a very ancient tree species, in our country has more than two thousand years of planting history. This is a picture of the result of a walnut tree. Look, in the middle of the leaves that green, round is the walnut. These are pictures of the growth of walnut trees. How walnuts grow out? The first flower buds grow new shoots, shoots began to grow up. The leaf is like the “mother” of the walnut tree, which provides nutrients for the development of the walnut tree