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本文对四川西部亚高山林区云杉天然林分生产力与生态条件的关系进行了初步研究。结果表明:云杉天然林分的平均净初级生产力为5656 kg/ha.a,光能利用率为1.63%,总生产力为18.85k cal/m~2/d;乔木层平均净初级生产力为4676kg/ha.a,光能利用率为1.35%,总生产力为15.57k cal/m~2/d。林分与乔木层净初级生产力和海拔、坡向及林分密度呈非线性的二次抛物线相关;和土壤厚度、叶面积指数呈线性相关。对上述相关关系进行了回归分析,建立了数学模型。另外,从植物生理生态学的角度,系统地考察了云杉森林生态系统的光能利用率、总生产力及产量经济系数在不同生态条件下的表现,作了分析与讨论。
This paper conducted a preliminary study on the relationship between natural forest productivity and ecological conditions of spruce forests in the sub-alpine region of western Sichuan. The results showed that the average net primary productivity of natural spruce forest was 5656 kg / ha.a, the light energy utilization rate was 1.63% and the total productivity was 18.85 kcal / m ~ 2 / d. The average net primary productivity of arbor layer was 4676 kg /ha.a, light energy utilization rate of 1.35%, total productivity of 15.57k cal / m ~ 2 / d. The net primary productivity and the quadratic parabola correlation of net primary productivity and altitude, aspect and stand density of stand were linearly correlated with soil thickness and leaf area index. Regression analysis of the above relationship, the establishment of a mathematical model. In addition, from the perspective of plant physiology and ecology, we systematically investigated the light energy utilization efficiency, total productivity and economic efficiency of spruce forest ecosystem under different ecological conditions, and analyzed and discussed.