【摘要】 基于林网体系尺度上的农田防护林持续经营模型 ,是以矩 (方 )形林网为对象 ,通过分析经营尺度、更新能力、林带更新年龄、更新方式等林网时空结构状态要素而建立起来的 ,是林网体系功能目标与时空结构状态之间的数量关系表达。本文通过有效性检验证明了该模型的实用性 ,并以辽宁省昌图前双井子行政村为对象 ,在杨树林网体系中应用该模型 ,计算出更新林带的空间位置和整个林网体系的结构动态变化过程 ,以及每个经营阶段林网体系中林带的年龄结构和空间分布状态转移序列 ,可形成持续经营状态林网体系 ,克服目前传统经营方式下林网的防护效益不能稳定维持的弊病 ,为优化林网配置形式和经营提供了方向。更多还原

【Abstract】 Taking square shelternets as a studying object, sustainable management model of shelterbelts/windbreaks in the shelternets system was constructed to express the quantitative relationship between functional aim of shelternets system and elements of spatio-temporal structure state of shelternets, by analyzing elements of spatio-temporal structure state of shelternets such as management scale, regeneration ability, regeneration age of shelterbelt and regeneration pattern. In this paper, the model validity was tested to testify the practicability of the model firstly. Then, the model was applied in the poplar networks on the study site, Shaobing Village of Changtu County, Liaoning Province. The spatial position of regeneration belts and the dynamic process of the whole shelternets structure were calculated, as well as the age sturcture and transfering series of spatial distribution of age in shelternets at every management stage. The results showed that application of this model would improve the management of shelterbelts, which could form the sustainable state and conquer the disadvantage of instable protection effects in traditional management.更多还原