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采取人工模拟松毛虫取食的方法，摘去油松部分２，３年生针叶，发现油松失去部分针叶后光合强度有所提高，并对当年新叶生长量没有影响．这表明油松受害后，其光合产量的增加是通过提高光合强度实现的．通过对组建的失叶率与初级产量关系模型分析，求出了不同失叶水平下的补偿点和超补偿点．当失叶率为２５％时，其初级产量不受当年新叶量多少的影响，始终高于对照组，其超补偿的表现相对稳定；当失叶率为５０％时，其补偿量随当年新生叶量而变化，表现出超补偿、补偿、准补偿，使“油松允许失叶量在５０％左右”有了一个可信的解释，为进一步研究油松被害后的补偿与超补偿机制提供了依据
Take artificial moths feeding method, pick pine part 2, 3-year-old needles, Pinus tabulaeformis lost part of the needle after the photosynthetic intensity has increased, and the new leaf growth was no effect. This indicates that the increase of photosynthetic yield of Pinus tabulaeformis is achieved by increasing the photosynthetic rate. Through the analysis of the model of the relationship between the rate of losing leaf and the primary yield, the compensation points and overcompensation points under different levels of leaf loss were obtained. When the rate of leaf loss is 25%, its primary yield is not affected by the amount of new leaf in the current year, and is always higher than that of the control. The performance of overcompensation is relatively stable. When the rate of leaf loss is 50% Newborn leaves change, showing overcompensation, compensation, quasi-compensation, “Pinus tabulaeformis allowed the loss of leaves in about 50%” has a credible explanation for the further study of Pinus tabulaeformis compensation and super-compensation mechanism Provided the basis