为了验证森林定量间伐效果,我们于1977年10月在该县设立了八个定位观测点。并于1979年10月进行了复测,现将初步观察及实测结果列表如下: 一、建立定位观测点的指导思想森林是一个动态的生态系统。通过营养链,把生物与环境因素紧密的联系在一个相互作用、循环不已的矛盾统一体中,就是说促动某个营养链(和改变某个成分的量),即可影响整个循环过程,从而打破系统的平 In order to verify the quantitative felling of forests, we set up eight survey sites in the county in October 1977. And conducted a retest in October 1979. The preliminary observations and the measured results are listed as follows: I. Guidelines for Establishing a Positioning Observation Site The forest is a dynamic ecosystem. Through the nutrition chain, the biological and environmental factors closely linked in an interactive and endless cycle of contradictory unity, that is to promote a nutrition chain (and change the amount of a component), you can affect the entire recycling process, Thus breaking the system’s level