@article{oai:yamagata.repo.nii.ac.jp:00004982,
 author = {山本, 隆儀},
 issue = {4},
 journal = {山形大学紀要．農学, Bulletin of the Yamagata Unibersity.Agricultural science},
 month = {Feb},
 note = {論文(Article), In the previous paper (Yamamoto, 2020), by combining many alternatives concerning training - pruning procedures, a large number of crown models were designed using the crown design system (CDS). In the present study, light environment, photosynthesis and characteristics of canopy shape in those models were compared between the alternatives (Experiment 1). The alternatives were classified into three grades with respect to efficiency to improve the light environment, viz., high, medium and low. Tree crown models were designed newly by combining the alternatives as all-play-all within each grade and analyzed to find out ideal crown models to improve the light environment (Experiment 2). As the results of Experiment 1, the next cases may be effective for the improvement, namely, the increment of central angle of the primary scaffold branches (PSBs) being equal to “360 degree / number of the PSBs”, the trunk being long, the first PSB emerging out of the south side of the crown, the PSBs branching with wide angles, the compound units of stems after secondary scaffold branches (units) being big in size, the units branching with narrow angles and the units rising horizontally at both sides of the PSB. But, some problems such as overreaching the allocated space and shortage or excess of the leafy blocks occurred. Especially, these were remarkable in the case of two PBSs. As the results of Experiment 2, the upper limit of daily mean PPFD at leaf surface on a clear day (CDMPPFD) distributed in a range of about 345-370 μE・m^-2・s^-1 , and that on an overcast day (ODMPPFD) did in a range of about 143-150 μE・m^-2・s^-1 . The lower limit of the CDMPPFD distributed in a range of about 250-260 μE・m^-2・s^-1 and that of ODMPPFD did in a range of about 115-118 μE・m^-2・s^-1. The alternative series necessary to construct tree crown models for the favorable light environment were found., 上記内容記述の「^-2」および「^-1」は上付き文字},
 pages = {287--320},
 title = {立木仕立て果樹における整枝せん定方法の選択肢が果樹園光環境に及ぼす影響 : モデル手法を用いた解析},
 volume = {18},
 year = {2021}
}