There are many advantages to planting shrubs and herbs together. If only shrubs are planted without grass, it is impossible to intercept slope runoff and reduce erosion in the early stage. Because shrubs grow slower than herbs in the early stage, their ability to cover the ground is poor; If only grass is planted without shrubs, the long-term slope protection effect is not obvious, the durability of slope protection is poor, and soil erosion cannot be completely controlled. Therefore, only by combining the two can we protect the slopes such as railways, highways, reservoirs and river banks for a long time.

There are many kinds of soil and water conservation plants that can be mixed, such as Amorpha fruticosa mixed with weeds, which has a good effect. 1 row of Amorpha fruticosa and 4 rows of weeds, with a row spacing of 20 cm. Horizontal ditch planting. Attention should be paid to compacting the soil, so that the roots of soil-conserving plants can be closely combined with the soil to ensure the survival of newly planted plants.

Weeds grow rapidly, cover the ground tightly, are not easy to invade, and can reduce transpiration intensity and improve the surrounding environment, which is very beneficial to the growth of Amorpha fruticosa. There are nodules in the underground part of Amorpha fruticosa. Free nitrogen in the air can be used to increase soil nitrogen, which is beneficial to the growth of weeds. Amorpha fruticosa has a well-developed root system, which can penetrate deep into the soil layer to absorb water during drought; Buffalo grass has strong drought tolerance and can withstand long-term drought. Amorpha fruticosa and bison are more salt-tolerant and are very beneficial to slope protection of railways, highways and reservoirs in saline-alkali land.