四川大头茶繁殖分配及其环境适应性的关联度研究

 本文研究了四川缙云山亚热带常绿阔叶林不同群落类型中四川大头茶的繁殖分配(RA)，并将植物种群的繁殖提高到种群适应对策的高度来分析，探索了应用灰色关联度分析、灰色动态模型研究四川大头茶繁殖分配的环境适应性。结果表明四川大头茶的RA随群落类型、年龄而发生变化，其每年繁殖分配所占比例为13.6％～20.0％，不同群落类型中四川大头茶RA大小顺序为大头茶纯林>针阔叶混交林>常绿阔叶林。关联度分析指出，10个环境生态因子中对四川大头茶繁殖分配影响较大的环境因素是群落土壤pH值、群落内的热状况和肥、水条件。繁殖分配与环境因子间相互作用的灰色关联时间动态模型方程为dy/dt+0.42y＝0.07x1–4.26x2–6.38x3+15.54x4–7.46x5+4.72x6+1.97x7–0.66x8+0.57x9–0.20x10

Reproductive Allocation in Gordonia acuminata in Subtropical Evergreen Broad-leaved Forest and Analysis of Its Adaptation Using Gray Rational Degree

The reproductive allocation (RA) of G. acuminata in different community types of subtropical evergreen broad-leaved forest of Jinyun Mountain was investigated. We analyzed the reproduction of the plant population as its adaptive strategies. Reproductive allocation in G. acuminata and its environmental adaptation were analyzed using gray rational degree and gray dynamic model. The results showed that the reproductive allocation in G. acuminata varied among age and community types. It was largest in pure forest of G. acurninata, intermediate in evergreen needle and broad-leaved forest, and smallest in evergreen broad-leaved forest. The gray rational analysis revealed that the soil pH, the average air temprature, the organic matter content of soil and soil moisture played an important role in formation of reproductive allocation of G. acuminata. The gray rational time dynamic model for interaction between reproductive allocation and environmental factors was expressed as:dy/dt+0.42y＝0.07x1–4.26x2–6.38x3+15.54x4–7.46x5+4.72x6+1.97x7–0.66x8+0.57x9–0.20x10