Seasonal dynamics of carbon and nitrogen in fine roots and their differences between successive rotation poplar plantations

In this study, poplar fine roots in two successive rotation plantations were sampled over seasons. Root samples were grouped from first to five orders to examine the seasonal dynamics of carbon and nitrogen contents of poplar fine roots with orders, and compared their differences between two success...

Full description

Saved in:
Bibliographic Details
Published inYing yong sheng tai xue bao Vol. 26; no. 11; p. 3268
Main Authors Wang, Yan-ping, Xu, Tan, Zhu, Wan-rui, Wang, Hua-tian, Zhang, Guang-can, Li, Chuan-rong, Jiang, Yue-zhong
Format Journal Article
LanguageChinese
Published China 01.11.2015
Subjects
Carbohydrates - chemistry
Carbon - chemistry
Nitrogen - chemistry
Plant Roots - chemistry
Populus - growth & development
Seasons
Online AccessGet more information

Cover

More Information
Summary:In this study, poplar fine roots in two successive rotation plantations were sampled over seasons. Root samples were grouped from first to five orders to examine the seasonal dynamics of carbon and nitrogen contents of poplar fine roots with orders, and compared their differences between two successive rotation plantations, and finally to find the relationships between the fine root growth and the productivity decline of successive rotation poplar plantations. The results showed that non-structure carbohydrates (NSC) content increased significantly with root orders, while nitrogen content decreased. The contents of total carbon and NSC were significantly related to total nitrogen content. Root orders explained 98.2% variance of carbon and nitrogen contents of poplar fine roots, and the difference between rotations only explained 1.7% of variance. Poplar fine roots consisted of more carbon and less nitrogen with root orders, and the seasonal changes in contents of total carbon, total nitrogen and NSC showed si
ISSN:1001-9332