Method for preventing and controlling water contamination in karst regions on basis of vegetation measures

The invention discloses a method for preventing and controlling water contamination in karst regions on the basis of vegetation measures, which is to plant native species which have high capability of absorbing ions contaminating water from southwest China on karst sloping fields in a reasonably optimized planting manner. The method can achieve the effects of conserving water and soil, preventing water and soil from losing, absorbing mineral ions which are easy to lose and cause contamination in soil and finally preventing and controlling the water contamination in the karst regions. The method of the invention is very suitable for use in karst regions of seriously destroyed vegetation, violent water and soil loss and capacity of causing downstream water contamination for effectively preventing water loss and preventing and controlling contamination of downstream water; therefore, the method has a very bright application prospect and a very high value.