摘要
本文讨论了森林病害造成材积生长损失的基本模式,系统提出森林病害经济危害允许水平、经济阈值、防治指标、病害最高及最低允许水平的定义。在此基础上,组建了相应的数学模型群;建议在我国森林病害综合管理的以生产实践为水准的现阶段,使用病害最低允许水平作为防治指标。
Proposes a fundamental pattern of volume loss caused by forest disease. Definitions of tolerable economic deficit level, economic threshold value, control index, the lowest and highest tolerable injury levels related to forest disease are given systematically, and relative mathematical models are constructed based on the pattern and definitions. The lowest tolerable forest. disease injury level used as control index in the integrated forest disease management practice in China are suggested.
出处
《西北林学院学报》
CSCD
1991年第3期1-7,共7页
Journal of Northwest Forestry University
关键词
森林
病害
数学模型
定义
forest disease
tolerable injury level
mathematical model
