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作 者 ：江洪

期 刊 ：植物生态学报 1986年 10卷 2期 页码：146-152

关键词：紫果云杉；生物量；净生产量；

Keywords:Picea purpurea, Biomass, Net-production,

摘 要 ：本文对四川松潘地区海拔3200—3300m的紫果云杉(Picea purpurea)天然中龄林分生物量和生产力进行了测定和研究。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，建立了估测乔木层单株林木各器官生物量的回归方程，方程的相关系数和估测的精度都较高，具有实用价值。结果表明：林分总生物量平均为158.779吨／公顷，净生产量为3.259吨／公顷·年。其中乔木层生物量为134.408吨／ 公顷，净生产量为2.890吨／公顷·年。研究证实叶面积指数与林分乔木层的生产力关系十分紧密。在—定范围内，叶面积指数为4.34的林分比叶面积指数3.32的，其乔木层净生产量可增加47.2%。林冠浓密的林分比林冠稀疏的生产力要高。另外，林分的产量结构上反映出下层木结 构不合理，应予间伐。

Abstract:

A preliminary research of plant biomass and production of natural middle-age stand of Picea purpurea at elevation 3200–3350m in Songpan County of Sichuan Province is presented here. Spruce tree, spruce sapling, undergrowth, living plant cover and dead branches and leaves were observed by “average standard tree” and “divided-storeys” method. The following regression equations were derived from the standing crop of the destructive trees:

Ws= 3.1660 (D2H) 0.4567, WBk =0.8657 (D2H)0.4109,

WB= 12.4382(D2H)0.1928 WF=2.9259(D2H)0.3129,

WR= 14.8482 (D2H)0.1960

The estimated total biomass of P. purpurea forest community is 158.78 t/ha, net production 3.415 t/(ha.·r.). Total aboveground biomass of spruce is 134.407 t/ha, net-production 2.890 t/(ha·yr.), in which the percentages of stem, bark, branch, leaf and root are 44.6%, 5.9%, 19.5%, 10.6% and 19.4% respectively. The biomass percentages of spruce tree, spruce sapling, undergrowth and living plant cover and dead branch and leaf are 84%, 2%,9% and 5% respectively. The close relationship between leaf area index (LAI) and the production of spruce tree was further proved. Within a certain limit the stand of LAI of 4.34 would increase by 47.2% in comparison with the stand of LAI of 3.32, and that of close crown is higher than that of thin crown.

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