Galitskiĭ V V
Zh Obshch Biol. 2012 Nov-Dec;73(6):442-52.
The sectional model of biomass dynamics of freely growing tree brahcnes of all orders is presented. The model is an extension of the sectional tree biomass model proposed earlier. The branches model showed bell-shaped dynamics of a branches biomass and, accordingly, boundedness of branch orders number. The important element of the model of branches system is the inter-verticil green biomass. The model is parameterized on the basis of published data on lifespan of branches of different orders and age in which the biomass of skeletal branches of spruce, Picea abies (L.) Karst, reaches the maximum. When adding known peculiarities of spruce growth (such as the initial growth inhibiton and presence of the inter-verticil branches) to the model of biomass dynamics of regular branches system, good appproximation of all natural data by model values is obtained. The possible mechanism of inter-verticil branches appearance in response to improvement of a tree growth conditions, and also their function in a tree growth process, namely replacement of regular branches incapable of appropriate response, is described. Initiation of appearing and/or waking of the sleeping (adventive) buds which give rise to inter-verticil branches is probably caused by rise of pressure of photosynthates in a tree phloem what the published results of experiments on a decapitaion of branches of Wollemia nobilis (Araucariaceae) also testify.
提出了各级自由生长树木枝条生物量动态的分段模型。该模型是对先前提出的树木生物量分段模型的扩展。枝条模型显示了枝条生物量呈钟形动态变化，相应地，枝条级数具有有限性。枝条系统模型的重要元素是轮间绿色生物量。该模型是根据已发表的不同级数枝条寿命以及云杉（Picea abies (L.) Karst）骨干枝条生物量达到最大值时的年龄数据进行参数化的。当将云杉生长的已知特性（如初始生长抑制和轮间枝条的存在）添加到规则枝条系统生物量动态模型中时，模型值能很好地拟合所有自然数据。描述了轮间枝条出现以响应树木生长条件改善的可能机制，以及它们在树木生长过程中的作用，即替代无法做出适当响应的规则枝条。产生轮间枝条的休眠（不定）芽的出现和/或苏醒可能是由于树木韧皮部光合产物压力升高导致的，这也得到了关于诺和木（南洋杉科）枝条去顶实验已发表结果的证实。
