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基于小兴安岭红松的树轮资料,确定了Tree-Ring生态机理模型模拟红松树木生长的参数。应用Tree-Ring模型对小兴安岭红松的生长过程进行了模拟,结果显示Tree-Ring模型在该地具有较好的适用性。参数敏感性分析表明红松树木生长比较敏感的参数是光合最低温度、光合最适温度下限、最适土壤体积含水率上限和最大土壤体积含水率。模拟发现,红松树轮宽度变化主要受到生长季上一年10月份气温和当年4月份气温变化控制。形成层开始生长平均是在4月下旬,这时水分充足,而温度在光合最低温度和最适温度下限之间,温度愈高,光合速率愈大,储存的养料愈多,因此表现为与树轮宽度的正相关关系。形成层生长结束的时间平均在10月上旬,用于形成层细胞生长的光合产物的消耗减少,而光合速率随着温度的升高而增大,因此,10月份的气温越高为下一年储存的养料越多,翌年易形成宽轮。
Based on the tree-ring data of Pinus koraiensis in Xiaoxing’anling, the parameters of Tree-Ring ecological model to simulate the growth of Pinus koraiensis were determined. Tree-Ring model was used to simulate the growth of Pinus koraiensis in Xiaoxing’anling. The results show that Tree-Ring model has good applicability in this region. Parameter sensitivity analysis showed that the parameters that are more sensitive to the growth of Pinus thunbergii are the lowest photosynthetic temperature, the lowermost temperature of photosynthesis, the upper limit of the optimum soil volumetric water content and the maximum soil volumetric water content. The simulation shows that the change of the width of the red pine tree is mainly controlled by the temperature in October and the temperature in April of the same year in the growing season. The formation of layers began to grow on average in late April, when sufficient moisture, and the temperature between the lowest photosynthetic temperature and the lower limit of the optimum temperature, the higher the temperature, the greater the photosynthetic rate, the more storage of nutrients, so the performance of the tree The positive correlation of wheel width. The average growth time of the cambium is in the beginning of October. The consumption of photosynthate used to form cambium is reduced while the photosynthetic rate increases with increasing temperature. Therefore, the higher the temperature in October is the next year The more nutrients stored, the formation of wide wheels the following year.