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在农田防护林可持续经营内涵与目标分析的基础上 ,提出农田防护林可持续经营的理想结构 ;以矩 (方 )形林网体系作为研究对象 ,分析经营尺度、更新能力、林带更新年龄、更新方式等林网体系时空结构状态要素 ,提出农田防护林可持续经营模型构建的基本条件 ;根据林网体系中林带环度与林带数量的关系 ,标定并量化网格中林带的空间位置和年龄结构分布 ,定义了需要更新林带之间的距离函数 ,来表征各林带之间的分散程度 ;根据更新林带在林网体系内时空分布的均匀性 ,构建了农田防护林可持续经营模型。
Based on the analysis of the connotation and objective of sustainable management of farmland shelterbelts, the ideal structure of sustainable shelterbelts for farmland shelterbelts was proposed. Based on the rectangular (square) shaped forest network system, the operating scale, renewal ability, age of regeneration, And so on. Based on the relationship between the forest belt loop and the number of forest belts in the forest network system, the spatial position and age distribution of the forest belt in the grid were calibrated and quantified. The distance function between forest belts is defined to characterize the degree of dispersion between forest belts. According to the uniformity of spatiotemporal distribution of forest belts in the forest network, a sustainable management model of farmland shelterbelts is constructed.