植物的根系之所以很长很多,是植物自身生长发育的需要。强大的根系首先可以把植物稳固在土壤中,根长得愈深愈多,植物就不容易被大风吹倒。其次植物生长需要大量的水分,庞大的根系可以保证向植物全身提供充足的源源不断的水分。此外,植物所需的有些养料深藏在土壤深处,根系分布 The reason why the root system of plants is much longer, is the plant's own growth and development needs. First, the strong roots of the plant can be stabilized in the soil, the root grows deeper, the plant is not easy to be blown down by the gale. Second, plant growth requires a lot of water, a large root system to ensure adequate supply of plants to the steady stream of water. In addition, some of the nutrients needed by plants deep in the soil deep, root distribution