[1]赵家豪,袁景西,袁在翔,等.武夷山南方铁杉针阔混交林不同地形土壤营养元素分析[J].南京林业大学学报(自然科学版),2020,44(4):176-182.[doi:10.3969/j.issn.1000-2006.201902009]
 ZHAO Jiahao,YUAN Jingxi,YUAN Zaixiang,et al.An analysis of soil nutrient elements in different terrains of coniferous(Tsuga chinensis var. tchekiangensis) and broadleaf mixed forest in Jiangxi Wuyishan[J].Journal of Nanjing Forestry University(Natural Science Edition),2020,44(4):176-182.[doi:10.3969/j.issn.1000-2006.201902009]
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
44
期数:
2020年4期
页码:
176-182
栏目:
研究论文
出版日期:
2020-09-01

文章信息/Info

Title:
An analysis of soil nutrient elements in different terrains of coniferous(Tsuga chinensis var. tchekiangensis) and broadleaf mixed forest in Jiangxi Wuyishan
文章编号:
1000-2006(2020)04-0176-07
作者:
赵家豪 袁景西 袁在翔 王小民 陈斌 郑元庆 关庆伟
作者单位:南京林业大学生物与环境学院,南方现代林业协同创新中心,江苏 南京 210037; 江西武夷山国家级 自然保护区管理局,江西 铅山334500
Author(s):
ZHAO Jiahao1 YUAN Jingxi2 YUAN Zaixiang1 WANG Xiaomin2 CHEN Bin1 ZHENG Yuanqing2 GUAN Qingwei1
(1.Co-Innovation Center for the Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; 2.Administrative Bureau of Jiangxi Wuyishan National Nature Reserve, Yanshan 334500, China
关键词:
南方铁杉 原始林 针阔混交林 地形 土壤营养元素 江西武夷山国家级自然保护区
Keywords:
var. virgin forest coniferous and broadleaf mixed forest terrain soil nutrient element Jiangxi Wuyishan National Natural Reserve.
分类号:
S718.5
DOI:
10.3969/j.issn.1000-2006.201902009
文献标志码:
A
摘要:
目的 南方铁杉(Tsuga chinensis var. tchekiangensis)在江西武夷山国家级自然保护区有较大的天然种群分布。探究江西武夷山南方铁杉针阔混交林中不同地形条件下土壤营养元素含量的特征,揭示地形因素对该地土壤营养元素迁移分布的影响,为深入研究土壤-植被相互关系以及生物多样性保护提供参考。 方法 以江西武夷山国家级自然保护区内面积为6.4 hm2的南方铁杉针阔混交林动态监测固定样地为研究对象,分析样地中土壤营养元素含量和变异特征;将样地中160个20 m×20 m的样方根据海拔、凹凸度和坡度等3种地形因子进行系统聚类并划分成4种不同的地形类型,比较这4种地形类型中0~20 cm的土壤中C、N、K、P、Fe、Na、Ca、Mg、Zn、Cu、Mn元素含量,并分析其与3种地形因子之间的关系。 结果 ①江西武夷山动态监测固定样地中各土壤营养元素含量的变异程度均为中等,其中土壤Cu和P元素的变异程度最强,土壤K元素的变异程度最弱。②4种地形中仅土壤C、N、P、Mg、Mn元素有显著性差异。③地形因子中,海拔的降低与坡度的增大均可增加土壤C元素含量;土壤Mn元素受凹凸度影响相对较高,其次为海拔,(呈负相关关系);凹凸度越大,土壤Ca元素含量越高。 结论 地形对土壤营养元素含量和迁移分布具有一定的影响,尤其可显著影响土壤中植物必需营养元素N、P的含量和分布,可成为南方铁杉种群分布和天然更新的限制因子。
Abstract:
Objective Tsuga chinensis var. tchekiangensis is widely distributed in the Jiangxi Wuyishan National Naturae Reserve. The effects of topographical factors on the spatial variation of soil elements in a permanent plot of coniferous (T. chinensis var. tchekiangensis) and broadleaf mixed virgin forest in Jiangxi Wuyishan were investigated. This provided a model system to study the relationship between soil, vegetation and biodiversity conservation. Method The study was carried out in a 6.4 hm2 coniferous and broadleaf mixed forest permanent plot, in the core region of the Jiangxi Wuyishan National Nature Reserve. The soil element content was analyzed from 160 samples, taken from 20 m × 20 m plots, which were divided into four topographic categories based on the clustering analysis of three topographic factors: altitude, convexity, and slope. The variation in the element contents of C, N, K, P, Fe, Na, Ca, Mg, Zn, Cu and Mn in the 0-20 cm layer of soil across the different terrains was analyzed to determine the relationship between the soil element content and the three topographic factors. Result ① The degree of variation in the soil element content in the permanent plot was moderate, although soil Cu and P varied the most, while K had the least variation; ② Only the element contents of soil C, N, P, Mg and Mn varied significantly among the different types of terrain; ③ Soil C increased with the increase of slope and decrease of altitude. Among the three topographical factors, soil Mn was most affected by convexity, followed by altitude, which was negatively correlated. Additionally, with the increase in convexity, the soil Ca content increased. Conclusion These results suggested that topography does affect the soil element content and migration distribution, in particular the content and distribution of plant essential nutrients N and P. This in turn may limit the distribution and regeneration of T. chinensis var. tchekiangensis population in the Jiangxi Wuyishan National Nature Reserve.

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备注/Memo

备注/Memo:
收稿日期:2019-02-15
更新日期/Last Update: 2020-08-13