Community Recovery and Stand Growth after Transforming the Secondary Broadleaved Forest into the Edible Fungi Raw Material Forest

The research found that the economic benefit was relatively high for the selection cutting which was advantageous to the rapid community recovery. The stand stocking already reached the level before the selection cutting with 7-years forest conservation. Although the amount of edible fungi timber gained was great for the clean cutting regeneration, the reserved young trees were damaged heavily, which was disadvantage to the growth and recovery of forest after felling. The increase amount of stand stocking during the forest conservation period was 64. 7% and 73. 4% of that with the selection cutting regeneration and the control in the area without management. The dynamic monitor result showed that the community recovery was relatively rapid after adopting the measures of selection cutting and the clean cutting regeneration with artificial promotion. The ground bud plant and 1-year-old plant proportions increased because of the transmittance's increasing sharply and the mass intrusions of heliophilous and indeteminate tree species after the thinning. In the 7th year, the phaenerophyte proportion was already close to that of the area without management. The species diversity indexes of different layers of arbor, brush and grass were higher than that of natural broadleaved forest without management, but the species homogeneous degrees of the different layers were close to the degree of natural broadleaved forest. The study also found that the soil nutrient loss was small for the two reproduction management modes. The forest land soil fertility already reached the former natural forest land soil fertility level through the 7-year's recovery.