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对甘肃小陇山天然锐齿栎群落乔木层生物量进行了测定和研究。结果表明,天然锐齿栎群落乔木层生物量为183 6 6t·hm2 ,其中以锐齿栎为主的慢生树种占6 4 89% ,中速生树种占33 4 0 % ,针叶树种占1 38%。乔木层生物量随着锐齿栎群落发育年龄的增长,积累增多,各器官具有不同的增长速度,到群落发育成熟时群落总生物量的和各器官生物量都达到最大值,群落进一步发育,总生物量趋于稳定,部分器官生物量有所衰减。群落发育过程中,慢生树种生物量比例趋于增大,中速生树种生物量比例逐渐减少,直到发育末期,随着优势种—锐齿栎的衰败,其生物量比例有所减少,中速生树种生物量的比例相应又有所增大,针叶树种在整个发育过程中生物量所占比例很小
The biomass of arbor layer in the natural Quercus acutissima community in Xiaolongshan of Gansu Province was measured and studied. The results showed that the biomass of arbor layer in natural Quercus variabilis community was 183 6 6t · hm2, of which, 4 4 89% were slow-growing species mainly composed of Quercus aliena, 33 40% were middle-fast-growing species and 1 38 were conifers %. The arbor layer biomass increased with the developmental age, accumulation and the growth rate of various organs. When the community matured, the total biomass of the community and the biomass of all organs reached the maximum, the community developed further, The total biomass tended to be stable, and the biomass of some organs was attenuated. In the process of community development, the proportion of biomass of slow-growing tree species tended to increase, and the proportion of biomass of middle-growth tree species gradually decreased. Until the end of development, the proportion of biomass decreased with the decline of dominant species, The proportion of tree biomass has correspondingly increased, and the proportion of coniferous species in the whole development process is very small