论文部分内容阅读
在天然林生长发育及演替过程中,每个阶段所出现的植物群落相互间已形成一个比较协调的生态环境。在这种协调的生态环境中,天然林植物群落多样性对病虫害具有较强的控制能力。在病虫与寄主群体生态中,相互间存在着一个动态平衡状态,大多数病虫处于低密度水平。随着天然林植物群落的演替和群落结构的改变,就会对病虫害自然控制力产生影响。产生其影响的有自然因素和人为因素等多个方面。
In the process of natural forest growth and succession, the plant communities in each stage have formed a more coordinated ecological environment. In this coordinated ecological environment, the diversity of natural forest plant communities has strong control over pests and diseases. In the pest and host community ecology, there is a dynamic balance between each other, most of the pests at low density levels. With the succession of the natural forest plant community and the change of community structure, the natural control of pests and diseases will be affected. Produce its impact of natural and human factors and many other aspects.