在水土流失严重的地方，需要及时控制与保护土壤，最常用的植物就是草。许多种类的草都能迅速萌芽与成片，并很快地使根系伸到土壤中，固定土壤。这些带有发达根系的植物不仅能很好地保护土壤，使其不受暴雨与流水的侵蚀，还能向土壤提供有机物来改善土壤肥力。植草是长期... In areas where water and soil erosion are serious, the soil needs to be controlled and protected in time. The most commonly used plant is grass. Many species of grass can germinate and become rapidly, and quickly reach the soil root, fixed soil. These plants with developed root systems not only protect the soil well from storm and run-off, but also provide organic matter to the soil to improve soil fertility. Grass is long-term ...