油松林下种子更新过程格局模型的初步研究

Preliminary Study on the Pattern Models of Seed Germination Process in Chinese Pine(Pinus tabulaeformis) Woodland

从数学模型层面上对油松天然林更新与林下种子萌生的关系进行深入研究,提出一系列的理论模型,并对种子领地分布模型进行引例数据拟合模型。结果表明,种子的超氧化物歧化酶和丙二醛随着频次增加呈负指数关系。非线性参数拟合分析表明:提出的模型能较好地模拟油松林下种子的空间分布状况,为油松林下种子空间分布状况的估计提供参考。

The natural forest regeneration of Pinus tabulaeformis largely depended on its seed germination in woodland. A series of theoretical models were provided in this paper, and of which Model of Demesne Distribution was fitted with experimental data. The re- suits showed that the contents of SOD and MDA of Chinese pine seed appeared a typical negative exponential relationship with its frequency. Regression estimate of non - linear parameter showed that all the three models proposed in this paper could simulate the spatial distribution of Pinus tabulaeformis seed. In addition, the ecological significance of each parameter was alsodiscussed, which could provide us the spatial distribution references of Pinus tabulaeformis seed.