@article{oai:iwate-u.repo.nii.ac.jp:00015687,
 author = {斎藤, 仁志 and 佐々江, 希望 and 白澤, 紘明 and 松澤, 義明 and 植木, 達人},
 issue = {6},
 journal = {日本森林学会誌, Journal of the Japanese Forest Society},
 month = {Dec},
 note = {樹種別の造材歩留まりを推定し，木質資源の利用可能量に与える影響を検討した。カラマツ・ヒノキ・スギ・アカマツの樹種別造材歩留まりを推定するため，長野県内で行われた搬出作業の結果から伐採量と販売量を把握し，造材歩留まり推定した。その結果，主伐ではすべての樹種において，造材歩留まりが従来値よりも低くなり，間伐では，アカマツ以外の樹種で従来よりも高い値となった。また，集材方法別では，車両系集材の方が架線系よりも高い値となった。この結果を用いて，樹種別に造材歩留まり考慮した場合と，従来通り一定値とした場合とでそれぞれ木質資源利用可能量推定を行った。その結果，従来方法の推定よりも，カラマツ，ヒノキ，スギでは利用可能量が増加し，アカマツでは利用可能量が減少することが明らかになり，造材歩留まりの正確な推定が重要であることが示された。, The yield percentage by tree species was estimated and the effect on the amount of wood biomass resources available was examined. In order to estimate the yield percentage of larch, cypress, cedar, and red pine by species, the results of logging operations in Nagano Prefecture were used to determine the amount of timber cut and sold, and to estimate the yield of lumber produced. As a result, the yield percentage of all tree species in clear-cutting was lower than the conventional value, and in thinning, it was higher than the conventional value for all tree species except red pine. In addition, by yarding system, the value for vehicle-based yarding was higher than that for overhead wire-based yarding. Using these results, we estimated the amount of wood biomass resources available when the yield percentage was taken into account for each tree species and when the percentage was assumed to be constant as in the conventional method. The results showed that the availability of larch, cypress, and cedar increased, while that of red pine decreased, compared to the estimation by the conventional method. The results suggest that it is important to accurately estimate the yield percentage.},
 pages = {443--448},
 title = {樹種別の造材歩留まりが木質資源利用可能量へ与える影響},
 volume = {103},
 year = {2021}
}