«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:

25卷

期数:

2019年01期

页码:

1-11

栏目:

研究论文

出版日期:

2019-02-25

文章信息/Info

Title:

Effects of Stand Age and Slope Position on the Stoichiometric Characteristics of the Cunninghamia lanceolata-Aleurites montana Mixed Forest

作者:

樊 月1; 2 陈志为1; 2 潘云龙1; 2 洪滔1; 2 苏少川3 吴承祯4 林 晗1; 2**

1福建农林大学林学院 福州 350002 2福建省高校森林生态系统过程与经营重点实验室 福州 350002 3福建省南平市建阳区林业局 建阳 354200 4武夷学院 南平 354300

Author(s):

FAN Yue1; 2;  CHEN Zhiwei1; 2;  PAN Yunlong1; 2;  HONG Tao1; 2;  SU Shaochuan3;  WU Chengzhen4;  LIN Han1; 2*

1 College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China 2 Key Lab for Forest Ecosystem Processes and Management in Fujian Province , Fuzhou 350028, China 3 Jianyang Forestry Adiministration, Jianyang 354200, China 4 Wuyi Universiy, Nanping 354300 , China

关键词:

千年桐; 杉木; 化学计量学; 林龄; 坡位

Keywords:

Aleurites montana;  Cunninghamia lanceolata;  Ecological stoichiometry;  stand age;  slope position

摘要:

以7-9 a生不同坡位（上坡、中坡、下坡）的杉木（Cunninghamia lanceolata）-千年桐（Aleurites montana）混交林的鲜叶、凋落叶及0-10 cm土壤层的养分含量为研究对象，分析不同林龄、不同坡位的碳氮磷含量及化学计量比的差异，探讨杉桐混交林随林龄和坡位变化的化学计量特征，以期为闽北山地针阔混交林的养分循环提供参考。结果表明：（1）两种树种C、N、P 含量基本表现为叶片＞凋落叶＞土壤，且在三个库之间差异显著。（2）混交林叶片N含量较低、P含量较高，凋落叶N、P含量均较低，土壤C、N含量较高而P含量偏低，叶片中较高的P含量是对土壤中相应养分含量缺乏的适应策略。（3）千年桐叶片的C、N、P及杉木的N、P均表现为9 a生的最高，凋落叶随林龄变化与叶片完全一致；混交林土壤P含量随林龄增加而增大。（4）混交林土壤有机C含量、N含量随坡位变化表现为上坡＞中坡＞下坡。结合本项目组的前期研究发现，该研究区幼龄期受N和P的共同限制，而在中龄期受N限制减缓仅受P元素的限制，表明混交林对林木的养分限制状况有一定的改善作用。本研究结果可为我国南方地区针阔叶混交林的可持续经营提供科学依据。（图3 表4 参43）

Abstract:

To reveal the ecological stoichiometry of fresh leaf, litter and 0-10 cm soil layer in mixed forest, an investigation was conducted in Cunninghamia lanceolata-Aleurites montana mixed forests of 7-9 years old on different slope positions (up-, mid- and down-slope). The results showed were that the C, N and P contents in two species showed leaf > litter > soil, except for the leaf of Aleurites montana with litter > leaf. There were significant differences in C, N and P contents among leaf, litter, and soil. The N content was low, and P content was high in lea f. The N and P contents were low in litter. The C, N contents w ere high , while P content was low in the soil . The P content was high in leaf is an adaptive strategy for lack of nutrient content in soil. (3) The C, N, P contents was high in leaf of Cunninghamia lanceolate as was for N, P contents in Aleurites montana in 9 years old forest stand. The amount of these nutrients in the litter was completely consistent with the leaf with the change of stand age, indicating that there was a close relationship between leaf and litter. The soil P content in the mixed forest increased with the increase of stand age. (4) The soil organic C and N contents were in the order of upper > middle > lower slope. (5) When compared with the previous studies, it was found that the 3-5 years old young growth in the research area was limited by both N and P elements. The mid-maturation forest was limited by the P only. These results indicate that the mixed forest has some certain improvements on the nutrient limitation. Determination of the C, N, P stoichiometric characteristics of the leaf-litter-soil in Cunninghamia lanceolate-Aleurites montana mixed forest in this study can provide a scientific guidance for the sustainable management of coniferous and broad-leaved mixed forests in southern China

常用功能

更新日期/Last Update: 2018-07-13