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基于树木年轮学与标准地调查法,研究了川西亚高山林区3种恢复森林类型生物量、蓄积量及生产力动态变化特征,旨在尝试年轮学在森林生长过程反演中的运用,并探索不同恢复模式下森林生物量和蓄积量的动态变化。结果表明,不同恢复类型发育至20年以后,均进入生长加速期,平均胸径间差异逐渐显著,人工云杉(Picea asperata)林胸径增长最快,明显高于天然恢复的次生桦木(Betula spp.)林和次生针阔混交林。在恢复过程中,次生针阔混交林一直保持最高的林分平均地上生物量与林分蓄积量,其地上平均生物量一直显著高于人工云杉林(p<0.05),在20年以后显著高于次生桦木林(p<0.05)。与人工云杉林相比,次生桦木林在25年前具有相对较高的生物量,而在25年之后则低于人工云杉林。在0-20年桦木林林分蓄积量略高于云杉林,而20年以后,云杉林蓄积量则超过桦木林。不同恢复类型的生产力大小对比显示,30年之前,次生针阔混交林>次生桦木林>人工云杉林,30年之后,针阔混交林生产力仍然最高,而人工云杉林则超过次生桦木林。川西林区次生针阔混交林恢复模式在生物量和蓄积量积累方面均具有显著优势。
Based on tree ring and standard survey method, the dynamic characteristics of biomass, stock volume and productivity of three restoration forest types in subalpine forest area of western Sichuan were studied in order to try the application of annual ring in the inversion of forest growth process, And explored the dynamic changes of forest biomass and stock volume under different restoration patterns. The results showed that the average DBH diameter of the Picea asperata grew fastest and significantly higher than that of the naturally recovered secondary birch (Betula spp) after 20 years of development. Forest and secondary coniferous and broad-leaved forest. In the process of restoration, the secondary forest of coniferous and broadleaf evergreens had the highest average aboveground biomass and stand volume, and the aboveground biomass had consistently higher than that of artificial spruce (p <0.05). After 20 years Significantly higher than the secondary birch forest (p <0.05). Secondary birch forests had a relatively high biomass 25 years earlier than artificial spruce forests, but were lower than artificial spruce forests 25 years later. In 0-20 years, the stock volume of birch forest was slightly higher than that of spruce forest, but after 20 years, the volume of spruce forest surpassed that of birch forest. Comparison of the productivity of different types of restoration shows that after 30 years, secondary coniferous-broadleaved mixed forest> secondary birch forest> artificial spruce forest, the productivity of coniferous-broad-leaved mixed forest remained the highest 30 years later, while that of artificial spruce forest exceeded that of secondary Birch forest. The secondary coniferous and broad-leaved forest recovery model in the western Sichuan forest area has significant advantages both in terms of biomass and accumulation.