防护林防护成熟与干扰

PROTECTIVE MATURITY OF PROTECTIVE PLANTATION AND DISTURBANCE

防护成熟是经营防护林的核心问题。作者在回顾防护林防护成熟研究进展的基础上 ,指出以往关于防护林防护成熟的研究 ,往往把森林看作一个纯自然物品 ,这是个非常理想的状态 ;提出了在干扰几乎无处不在的当今社会 ,对防护林防护成熟的认识上应重视干扰因子的作用 ;并给出了防护林防护效益变化模式图 。

Protective maturity is the key in protective forest management. Based on reviewing studies of progresses and questions of protective maturity, the authors point out that it is in a perfect state that forest was previously regarded as a pure, natural good. The factor of disturbance must be taken into account in our understanding of protective maturity for protective forest, especially nowadays with disturbance anywhere. The model on transformation of protective benefit is presented in this paper. The relationship between disturbance and protective maturity is analyzed and discussed with modeling, and a case study of soil and water conservation forest in western Liaoning province. The authors argued that some protective forests can reach no, one, or more times protective maturity depending on the type, degree, continuance time of disturbance and other factors.