摘要
[目的]研究太原市不同林龄油松人工林生物量的变化规律.[方法]采用平均标准木法和样方收获法获取不同林龄(12、26、45年)油松人工林乔木层、灌木层、草本层及枯落物层的生物量,分析了各器官及各层次生物量的分配特征.[结果]不同龄林林分的总生物量随林龄的增大而增大,12、26、45年生的油松生物量分别为9.79、217.48、276.06 t/hm2.乔、灌、草及枯落物层次分配方面,乔木层生物量占绝对优势,且随林龄增大而增大,其次为枯落物层.草本层和灌木层生物量较小,随林龄增大,有降低趋势.不同层次的生物量从大到小依次为乔木层、枯落物层、草本层、灌木层.[结论]该研究可为促进油松人工林合理经营与利用提供科学依据.
Abstract
[Objective]To study the biomass changes of Pinus tabuliformis plantations at different stand ages in Taiyuan.[Method]The biomass of tree layer, shrub layer, herb layer and litter layer of Pinus tabuliformis plantation with different stand age (12, 26, 45 a) were obtained by means of average standard wood method and quadrat harvesting method.The distribution characteristics of biomass in different organs and layers of Pinus tabuliformis were analyzed.[Result]The total biomass of different age stands increased with the increase of stand age, and the biomass of 12, 26 and 45 a were 9.79, 217.48 and 276.06 t/hm2, respectively.In the allocation of shrub, grass and litter, the biomass of tree layer was dominant, and it increased with the increase of stand age, followed by litter.The biomass of herb layer and shrub layer was small, and it decreases with the increase of stand age, the biomass of different levels from big to small followed by tree layer, litter layer, herb layer and shrub layer.[Conclusion]The study can provide a scientific basis for promoting rational management and utilization of Pinus tabuliformis.
基金项目
山西省回国留学人员科研资助项目(2015-119)
国家科技期刊平台
NSTL
维普
万方数据