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本文对四川西部高山林区云杉天然林分的生物量和生产力进行了测定与研究。按平均标准木法和样方收获法分别调查了乔木层、幼树下木层、草本地被物层和枯枝落叶层的生物量。据调查数据,按“相对生长法则”建立了估测乔木层单株木各器官生物量的回归方程,方程均具较高的精度。文中还研究了不同自然分布区和不同林型对于云杉林分生产力的影响,以及不同密度的林分中产量结构的变化。结果表明:云杉天然林分平均总生物量为285.906吨/公顷;净生产量为6284公斤/公顷·年林分中乔木层、幼树下木层、草本地被物层和枯枝落叶层生物量的平均比例是:74.4％∶4％∶11.6％和10％。乔木层生物量为212.773吨/公顷、净生产量是4676公斤/公顷·年。乔木层各器官(干、皮、技、叶、根)生物量的比例是:54.9％∶5.2％∶12.5％∶7.1％∶20.3％。发现云杉林分的生产力在针叶树种中是比较高的。另外云杉在高山峡谷区比在丘状高原区其生产力要高出77.1％,可达6536公斤/公顷·年。调查的云杉四种林型中,生产力最高的是灌木—云杉和箭竹—云杉林型,其净生产量可达6422和9246公斤/公顷·年,其次是禾草—云杉林型,为5975公斤/公顷·年,最差的是苔藓—云杉林型,只有3095公斤/公顷·年。林分密度对林木的产量结构有显著影响。林分内各
This paper measured and studied the biomass and productivity of natural spruce forest in western mountainous areas in China. According to the average standard method and the quadrat harvesting method, the biomass of arbor layer, young tree understory, herb layer and litter layer were investigated. According to the survey data, the regression equation for estimating the biomass of individual organs of arbor layer was established according to the relative growth law, and the equations all have high precision. The paper also studied the impact of different natural distribution areas and different forest types on the productivity of spruce stand, and the changes of yield structure in different density stands. The results showed that the average total biomass of natural spruce forest was 285.906 t / ha and the net production was 6284 kg / ha. The arbor layer, young tree subfamily, herb cover layer and litter layer The average biomass ratio is: 74.4%: 4%: 11.6% and 10%. The tree layer biomass was 212.773 tonnes / ha and the net production was 4676 kg / ha · year. The ratio of biomass of various organs (stem, skin, skill, leaf, root) in the arbor layer was 54.9%: 5.2%: 12.5%: 7.1%: 20.3%. The productivity of spruce stands was found to be high in coniferous species. In addition, spruce produced 77.1% higher productivity in the Alpine Gorge area than in the hilly plateau, reaching 6536 kg / ha · year. Of the four forest types surveyed, the highest productivity was shrub-spruce and arrow-bamboo-spruce forest, with a net production of 6422 and 9246 kg / ha · year, followed by grass-spruce forest , 5975 kg / ha · year, the worst is the moss-spruce forest type, only 3095 kg / ha · year. Stand density has a significant effect on the yield structure of trees. Within the forest