System of scenic thinning for man-made forests

通过对奈良县矢野县、鹿儿山县、森地县的柳杉林、群马县Oneyama森林公园的几种森林、长野县赤泽森林公园的短叶松林、长野县神宫县的赤松林和短叶松林的调查，揭示了它们的森林结构。在伊势神社森林，我们就森林经营政策采访了负责人。在此基础上，我们分析了上米那县5个森林的森林结构，包括停止经营、经营、人工林和人工林根据以上研究结果得出结论，针对大树林地的景观疏伐，可以制定如下政策。在已停止经营的人工林中，改善抑制人工林的积压林。以停止经营的人工林和管理林中现有树木组成的大乔木林为目标。保持森林分层及其多样性，考虑上层和下层的平衡，以实现森林的永久更新。

As results of the surveys of the Cryptomelia japonica forests at Yashino, Kasugayama, and Murooji in Nara prefecture, of some kinds of forests at Oneyama forest park in Gunma prefecture, of the Chamaecyparis obtusa forests at Akasawa forest park in Nagano prefecture, and of Pinus densiflora and Chamaecyparis obtusa forests at Kamiina County in Nagano prefecture, we have revealed their forest structures.And, at Ise shrine forest, we have interviewed the person in charge about the policy of forest management.And then, we have analyzed the forest structures of 5 forests at Kamiina County, including man-made forest where the management have been stopped, managed forest, and scenic beauty forest.As a conclusion drawn from above-mentioned results, we can make following policies about the scenic thinning aiming for great trees forest.1. Improve overstocked stand which inhibits plantation forestry in man-made forest where the management have been stopped.2. Consider as goal great trees forest which consists of the present trees in man-made forest where the management have been stopped and in managed forest.3. Maintain the stratification of forest and its diversity, considering the balance of upper story and under story to eternal forest regeneration.