The natural recovery of the forest fire vestige, afforestation and its effect

The natural recovery of the forest fire vestige and the afforestation and its effect in Northwest of Guangxi were studied. The results express that with the increment of the operating time, the soil organic matter is averagely increased by 2.50%～4.08%, total N by 11.80%～43.64%, total P by －2.33%～19.95%, total K by 17.73%～44.33%; the biomass amount of artificial oil tea is the tallest, which attains 87791kg／hm², the next is artificial eucalyptus being 70799kg／hm²; the productivity of artificial wood lotus is the tallest being 36965kg／hm², the next is artificial oil tea being 32746kg／hm². The water and soil conservation effect of artificial bamboo and artificial oil tea is the best, the next is artificial wood lotus, artificial horsetail and artificial eucalyptus.