文献类型：期刊文献

英文题名：Growth and Nitrogen Retranslocation of Nutrient-Loaded Clonal Betula alnoides Transplanted with or without Fertilization

作者：Chen, Lin[1,2] Ma, Yue[1] Li, Hua[1] Zeng, Ji[1] Dell, Bernard[3,4] Li, Zhaoying[1]

第一作者：Chen, Lin;陈琳

通信作者：Chen, L[1];Chen, L[2]

机构：[1]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China;[2]Youyiguan Forest Ecosyst Res Stn, Pingxiang 532600, Peoples R China;[3]Murdoch Univ, Agr & Forest Sci, South St Campus, Murdoch, WA 6150, Australia;[4]Chinese Acad Forestry, Beijing 100091, Peoples R China

年份：2021

卷号：12

期号：11

外文期刊名：FORESTS

收录：;EI(收录号：20220311476546);Scopus(收录号：2-s2.0-85122795102);WOS:【SCI-EXPANDED(收录号:WOS:000724281500001)】；

基金：This study was jointly funded by the Central Research Institute of Basic Research and Public Service Special Operations, Chinese Academy of Forestry (grant number CAFYBB2019MA003) and National Natural Science Foundation of China (grant number 31800533).

语种：英文

外文关键词：nutrient loading; N-15 labeling; transplant fertilization; nitrogen retranslocation; field performance

摘要：Nutrient loading can improve the growth and nutrient content of nursery-grown Betula alnoides Buch.-Ham. ex D. Don, but it is unknown whether nutrient loading enhances growth and nutrient uptake after transplanting. Plants were grown with three nutrient loading treatments (N100, N200, and N400; 100, 200, and 400 mg N per plant as N-15-urea) in nursery containers and then transplanted into plastic pots, with or without controlled-release fertilizer (F0 and F10, 0 and 10 g per plant). The N400 plants had a smaller size but higher nitrogen concentration relative to the N100 and N200 plants before transplanting. However, 180 days after transplanting, the N200 and N400 plants had superior root collar diameter, root length, and root area compared to the N100 plants, due to an increase in N-15 retranslocation to new stems and new leaves. Moreover, transplant fertilization (F10) enhanced the height, root collar diameter, root length, and plant dry mass, but not nitrogen concentration or retranslocation, relative to F0. We recommend that medium- and high-dose nutrient loading is implemented in B. alnoides nurseries to optimize growth after transplanting. Additional fertilizer at transplanting may be advantageous in supporting growth, owing to the rapid depletion of nutrient reserves after planting out in the field.