Ecological environment analysis of Abies holophylla plantations under different cutting systems

摘要

Different types of plantations were observed in Baishilazi National Nature Reserve, Liaoning Province,for 34 a. The environmental quality of Abies holophylla plantations was analyzed under different cutting systems.Analysis factors included soil erosion rate, humification degree of litters, and water hold capacity. The surface soil loss of clear cutting area was 19 000 t·km-2·a-1 more than that of selective cutting area. The content of soil organic matter in board-leaved-Abies holophylla forest was 4.62% more than that in pure stand, and the water hold capacity of the mixed forest was 1.43 time of that of pure stand. The mixed forest of board-leaved--Abies holophylla by selective cutting can upgrade the ecological environment quality.