Development of above-ground and underground parts of containerized and bare-rooted seedlings in Picea jezoensis over three years after planting
後藤, 晋 ,
西山, 教雄 ,
村瀬, 一隆楠本, 大
51 , 2015-09-01 , 東京大学大学院農学生命科学研究科附属演習林
In November 2011, we planted three-year-old tree seedlings that were either bare-root or grown in containers. We tracked the growth of the seedlings by measuring height and root collar diameter in the winters of 2012, 2013, and 2014. After measurement, we chose more than ten seedlings of each type and measured the dry weight of the above-ground and below-ground parts. The height of the containerized seedlings was significantly greater than that of the bare-rooted seedlings in 2012, but was not significantly different in either 2013 and 2014. The root collar diameter of the containerized seedlings was significantly smaller than that of bare-rooted seedlings in all years. The dry weight of the below-ground parts was lower for containerized seedlings in 2013, but was not significantly different between two types of seedlings in 2014. Furthermore, the T/R ratio of containerized seedlings was less than that of bare-rooted seedlings in 2014.