滨海沙地不同固氮树种叶片氮、磷重吸收与生物固氮的耦合关系

葛露露; 孟庆权; 林宇; 何宗明

doi:10.13870/j.cnki.stbcxb.2019.01.022

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滨海沙地不同固氮树种叶片氮、磷重吸收与生物固氮的耦合关系

更新时间：2025-03-12

- 滨海沙地不同固氮树种叶片氮、磷重吸收与生物固氮的耦合关系
- Coupling Relationship Between Biological Nitrogen Fixation and Leaf Resorption of Nitrogen and Phosphorus of Different Nitrogen Fixing Tree Species in Southeast Coastal Area
- 水土保持学报 2019年33卷第1期页码：134-138
- 作者机构：
  
  1. 福建农林大学林学院,福州,350002
  2. 福建省长乐大鹤国有防护林场, 福建长乐,350212
- 作者简介：
  
  [ "葛露露(1992-),女,硕士研究生,主要从事恢复生态与生态工程研究。E-mail:1293447419@qq.com" ]
- 基金信息：
  
  国家自然科学基金项目（31570604，41371269）福建省林业科技项目（闽林科[2014]2号）福建农林大学林学高峰学科项目
- DOI：10.13870/j.cnki.stbcxb.2019.01.022
  中图分类号： S718.5
- 纸质出版：2019
- 稿件说明：
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葛露露, 孟庆权, 林宇, 等. 滨海沙地不同固氮树种叶片氮、磷重吸收与生物固氮的耦合关系[J]. 水土保持学报, 2019,33(1):134-138.

GE Lulu, MENG Qingquan, LIN Yu, et al. Coupling Relationship Between Biological Nitrogen Fixation and Leaf Resorption of Nitrogen and Phosphorus of Different Nitrogen Fixing Tree Species in Southeast Coastal Area[J]. 2019, 33(1): 134-138.
葛露露, 孟庆权, 林宇, 等. 滨海沙地不同固氮树种叶片氮、磷重吸收与生物固氮的耦合关系[J]. 水土保持学报, 2019,33(1):134-138. DOI： 10.13870/j.cnki.stbcxb.2019.01.022.

GE Lulu, MENG Qingquan, LIN Yu, et al. Coupling Relationship Between Biological Nitrogen Fixation and Leaf Resorption of Nitrogen and Phosphorus of Different Nitrogen Fixing Tree Species in Southeast Coastal Area[J]. 2019, 33(1): 134-138. DOI： 10.13870/j.cnki.stbcxb.2019.01.022.

摘要

福建滨海沙地氮磷养分匮乏，季节性干旱严重。养分重吸收可以减弱植物对土壤养分供应的依赖，从而增强植物适应逆境的能力。以福州市滨海后沿沙地人工营造的木麻黄、肯氏相思和纹荚相思人工林为研究对象，进行不同叶龄（成熟叶、衰老叶）叶片N、P浓度及稳定氮同位素丰度值（δ15N）的测定，通过统计手段研究叶片N、P重吸收效率（NRE、PRE）、重吸收度（NRP、PRP）及其与生物固氮率的关系。结果表明：（1）滨海沙地不同固氮树种叶片NRE表现为纹荚相思（52.80%） > 肯氏相思（28.27%） > 木麻黄（24.63%），纹荚相思叶片NRE显著高于肯氏相思和木麻黄，但后两者间无显著差异；PRE表现为肯氏相思（74.08%） > 纹荚相思（63.99%） > 木麻黄（40.47%），且相互之间差异显著。（2）滨海沙地不同固氮树种生物固氮率表现为肯氏相思（69.45%） > 纹荚相思（69.15%） > 木麻黄（34.59%），2种相思树种生物固氮率无显著差异，但显著高于木麻黄99.88%~100.77%。（3）滨海沙地不同固氮树种生物固氮率与NRE、PRE和NRP呈负相关关系，与叶片PRP呈正相关关系。因而，滨海沙地不同固氮树种生物固氮与叶片的氮、磷重吸收存在耦合关系，并显著影响氮、磷重吸收效率和重吸收度。研究结果为揭示滨海沙地不同固氮树种对贫瘠土壤和季节性干旱的适应机制提供依据，也为滨海沙地营林管理提供参考。

Abstract

Nitrogen and phosphorus deficiencies and seasonal drought are major problems of plantations in coastal sandy land of Fujian. Nutrient resorption can reduce dependence of plants on soil nutrients supply

thereby enhancing their ability to adapt to adversity. Casuarina equisetifolia

Acacia cunninghamia and A.aulacocarpa artificial plantations in the coastal sandy land of Fuzhou city were taken as objects

and nitrogen and phosphorus concentrations and stable nitrogen isotope abundance values (δ15N) in leaves at different ages (mature leaves and senescent leaves) were determined. The nitrogen and phosphorus resorption efficiencies of leaves (NRE

PRE)

resorption proficiency (NRP

PRP) and their relationship with biological nitrogen fixation rates were studied by statistical methods. The results showed that (1) the NRE of leaves of different nitrogen fixing tree species in the coastal sandy land was sequenced as A.aulacocarpa (52.80%) > A.cunninghamia (28.27%) > C.equisetifolia (24.63%). The leaf NRE of A.aulacocarpa was significantly higher than those of A.cunninghamia and C.equisetifolia

but there was no significant difference between the latter two species. The PRE of leaves followed the order of A.cunninghamia (74.08%) > A.aulacocarpa (63.99%) > C.equisetifolia (40.47%)

and there was significant difference among them. (2) The biological nitrogen fixation rates of different nitrogen fixing trees in coastal sandy land listed in the order of A.cunninghamia (69.45%) > A.aulacocarpa (69.15%) > C.equisetifolia (34.59%). There was no significant difference in nitrogen fixation rate between the two Acacia species

however

the biological nitrogen fixation rate of the two Acacia species was significantly higher than that of C.equisetifolia by 99.88%~100.77%. (3) The biological nitrogen fixation rates of different nitrogen fixing trees was negatively correlated with NRE

PRE and NRP

and positively correlated with PRP. Therefore

there was a coupling relationship between nutrient resorption and biological nitrogen fixation (BNF) in different nitrogen fixing tree species in the coastal sandy land

and BNF significantly affected NRE

PRE

NRP and PRP. The results would provide a basis for revealing the adaptation mechanism of different nitrogen fixing tree species to barren soil and seasonal drought in coastal sandy land

and also provide a reference for forest management.

关键词

Keywords

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