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为了在我国建立全国性的森林植被生长模拟系统,选择美国的森林植被模拟系统(FVS)作为预测森林植被生长的参照原型。但是,森林植被生长受各种环境因子和其本身生理活动差异的影响,造成生长的极端复杂性,而FVS中也存在大量生长特征量,需对它们进行有选择的研究。本文从众多生长特征量中选择胸径作为基本特征量,以北京西山地区油松、侧柏的调查数据为数据源,对各种生长模型进行研究分析,对FVS中的模型进行利用和修正后,模拟了基本生长模型,经计算验证,该方法形成的生长预测体系是完整有效的。
In order to establish a national simulation system of forest vegetation growth in our country, the United States Forest Fence Simulation System (FVS) was selected as a reference prototype for predicting the growth of forest vegetation. However, the growth of forest vegetation is affected by the difference of various environmental factors and their own physiological activities, resulting in the extremely complex growth. However, there are a large number of growth characteristics in FVS, so they need to be studied selectively. In this paper, we choose the DBH as the basic characteristic quantity from many growth characteristics and take the survey data of Pinus tabulaeformis and Platycladus orientalis in Beijing Xishan as the data source to study and analyze various growth models. After using and correcting the model in FVS, Simulation of the basic growth model, calculated by the verification, the growth prediction system formed by the method is complete and effective.