Study on Growth Effect of the Mixed Plantation Composed of Pinus sylvestris var. mongolica and Amorpha fruticos in the Musu Desert Area

The silvicultural techniques to plant mixed stands composed of Pinus sylvestris var. mongolica and Amorpha fruticos were studied according to the characteristics of Musu sand land to mitigate the impact of site degradation and insect pest infestation resulted from pure plantation of Pinus sylvestris var. mongolica. The planting effect of mixed stand was analyzed by comparing the growth status of mixed stands with the pure stands. The results showed that planting the two tree species in mixed stands might prevent the plantation from pest damage and significantly increase the growth rate and survival rate of Pinus sylvestris var. mongolica. Compared to the pure stand of Pinus sylvestris var. mongolica, the coverage, species richness and the litter rate of the mixed stands and the formation of forest community environment could be significantly promoted.