西藏林芝县林芝云杉幼林更新与物种多样性指数研究

The article summarized the species diversity index and regeneration of young Linzhi spruce stand at Linzhi region in Tibet. It showed that the diversity index of the young Linzhi spruce stand community was high. The Simpson diversity index is 0.871, while the Shannon Wiener diversity index is 3.976. But the diversity index of arbor layer of young Linzhi spruce stand was lower. Its Simpson diversity index was 0.336,the Shannon wiener diversity index was 0.899. Linzhi spruce occupied 89% of the regeneration sapling.Its average basal diameter, average height was 3.5cm and 125cm respectively. The linzhi spruce regeneration sapling grew well. The authors suggest that local forestry bureau should carry on closing hill for afforestation in this area continually. At the same time, artificial regeneration measures should be taken to improve the young Linzhi spruces crown density.