Forest ecosystem health theory 森林生态系统健康理论
Forest health is a new theory produced in control practice of forest pest and fire in recent ten years.
森林健康是美国近十多年来在森林病虫火防治实践中形成的一种新的理论。
Based on the theory of ecosystem health, healthy condition of urban forest ecosystem in Yan 'an was analyzed and assessed by setting diagnostic indicator system.
运用生态系统健康理论建立了城市森林健康评价指标体系，对延安市不同类型城市森林进行了分析评价。
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