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[1]邓浩俊,陈爱民,严思维,等.不同林龄新银合欢重吸收率及其C:N:P化学计量特征[J].应用与环境生物学报,2015,21(03):522-527.[doi:10.3724/SP.J.1145.2014.11032]
 DENG Haojun,CHEN Aimin,YAN Siwei,et al.Nutrient resorption efficiency and C:N:P stoichiometry in different ages of Leucaena leucocephala[J].Chinese Journal of Applied & Environmental Biology,2015,21(03):522-527.[doi:10.3724/SP.J.1145.2014.11032]
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不同林龄新银合欢重吸收率及其C:N:P化学计量特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
21卷
期数:
2015年03期
页码:
522-527
栏目:
研究论文
出版日期:
2015-06-25

文章信息/Info

Title:
Nutrient resorption efficiency and C:N:P stoichiometry in different ages of Leucaena leucocephala
作者:
邓浩俊陈爱民严思维林勇明张广帅杜锟吴承祯洪伟
1 福建农林大学林学院 福州 350002 2 武夷学院生态与资源工程学院 南平 354300
Author(s):
DENG Haojun CHEN Aimin YAN Siwei LIN Yongming ZHANG Guangshuai DU Kun WU Chengzhen HONG Wei
1College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China 2College of Ecology and Resource Engineering, Wuyi University, Nanping 354300, China
关键词:
干热河谷新银合欢鲜叶凋落叶重吸收率化学计量特征
Keywords:
hot and dry valley Leucaena leucocephala leaf litter resorption efficiency stoichiometric characteristics
分类号:
Q945.79
DOI:
10.3724/SP.J.1145.2014.11032
文献标志码:
A
摘要:
以干热河谷区9、15、26年生新银合欢(Leucaena leucocephala)为研究对象,运用单因素方差分析和Pearson相关性分析,测定并计算其鲜叶、凋落叶的养分含量、重吸收率及其C:N:P化学计量比. 结果显示:新银合欢鲜叶N、P含量均表现为15年生>26年生>9年生,凋落叶N、P含量随林龄增加而增大;N、P重吸收率随林龄增大而下降,N、P重吸收率分别在42.76%-55.90%和26.35%-40.60%之间,N重吸收率均大于P重吸收率;鲜叶C:N、C:P均小于凋落叶,但鲜叶N:P大于凋落叶,且N:P均大于20;N重吸收率除与凋落叶N:P无显著相关性外,与其他化学计量比均呈显著正相关(P < 0.05);P重吸收率除与凋落叶C:N、C:P有极显著正相关外(P < 0.01),与其他化学计量比无显著相关性. 本研究表明,干热河谷区新银合欢养分重吸收率表现出随林龄的增大呈下降的趋势,说明新银合欢保存养分的能力随林龄增大而下降;而新银合欢在生长过程中主要受P限制.
Abstract:
This research studied the leaf nutrient content before and after senescing, nutrient resorption efficiency (RE) and C:N:P stoichiometry of 9, 15 and 26 years Leucaena leucocephala in hot and dry valley, using one way analysis of variance and Pearson correlation analysis. The results showed the leaf nitrogen (N) and phosphorus (P) content in an order of 15 a > 26 a > 9 a, and an increase of N and P content of litter along with the forest age. N and P resorption efficiency (42.76-55.90% and 26.35-40.60% respectively) decreased with the forest age, with the N resorption efficiency greater than P resorption efficiency. Leaf C:N and C:P were less than that of litter, but leaf N:P was greater than that of litter and both of them bigger than 20. Except the N:P of litter, N resorption efficiency was significantly and positively correlated to other stoichiometric ratio, while P resorption efficiency was significantly and positively correlated only to C:N and C:P of the litter. On the whole, the nutrient resorption efficiency of Leucaena leucocephala decreased along with forest age in the hot and dry valley, indicating that the ability of nutrient conservation decreases with the forest age. Besides, we also found that P is the main limiting factor of Leucaena leucocephala growing.

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备注/Memo

备注/Memo:
国家自然科学基金项目(41201564)和福建农林大学林学院青年科研基金项目(6112C039Q)资助 Supported by the National Natural Science Foundation of China (41201564) and the Youth Science and Technology Foundation of Forestry College Fujian Agriculture and Forestry University (6112C039Q)
更新日期/Last Update: 2015-06-23