引言在过去的200多年时间里,林业的基本概念一直都未曾发生过改变。“多资源森林经理”代表着向现代林业的一种挑战。当今的林业模式,大体包括两个部分:“永续收获”与“多用途”。“永续收获”部分当然定义了今天的林业模式:将一种可更新资源的定期积累(收获)限定在其定期生长(增值)之内。对于单一的资源,永续收 Introduction Over the past 200 years, the basic concept of forestry has not changed. “Multi-resource forest managers” represent a challenge to modern forestry. Today’s forestry model, generally consists of two parts: “sustainable harvest” and “multi-purpose.” The “perpetual harvest” course defines today’s forestry model: limiting the regular accumulation (harvest) of an updatable resource to its regular growth (value added). For a single resource, sustainable income