为什么光秃、陡峻的九华山花岗岩岩体有繁茂的植被？这是花岗岩节理裂隙的功劳。九华山花岗岩的节理裂隙一方面为种子发芽、根系生长提供空间环境，另一方面节理裂隙中的泥土和水分提供植物生长的养分。同时，植物生长也会加速裂隙发育与岩石风化，增加新的空间与养分，这是生物物理与化学风化作用。 The Joints and Plant Growth Why can lush vegetation grow on bald precipitous granite rocks in Jiuhuashan? That thanks to the granite joint fissures which provide space for seed germination and root growth, and on the other hand, the mud and water within joint fissures provide nutrients for the growth of plants. At the same time, the growth of plants accelerates the development of fissures and weathering of rocks, and increases new space and nutrients, which are biophysical and chemical weathering.