Influence of Afforestation Density on Plant Diversity and Soil Physicochemical Properties of Pinus Tabulaeformis in Arsenic Sandstone Area

Fan Dong; Yang Zhenqi; Qin Fucang; Zhang Tiejun; Wang Xin

doi:10.13961/j.cnki.stbctb.2024.06.008

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Influence of Afforestation Density on Plant Diversity and Soil Physicochemical Properties of Pinus Tabulaeformis in Arsenic Sandstone Area

- Influence of Afforestation Density on Plant Diversity and Soil Physicochemical Properties of Pinus Tabulaeformis in Arsenic Sandstone Area
- Bulletin of Soiland Water Conservation Vol. 44, Issue 6, Pages: 68-76(2024)
- 作者机构：
  
  1. 内蒙古农业大学沙漠治理学院, 内蒙古自治区,呼和浩特,010018
  2. 中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,北京,100083
  3. 内蒙古自治区林业科学研究院, 内蒙古自治区,呼和浩特,010010
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2024.06.008
  CLC： S714.2;S791.254
- Published：2024
- 稿件说明：
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Fan Dong, Yang Zhenqi, Qin Fucang, et al. Influence of Afforestation Density on Plant Diversity and Soil Physicochemical Properties of Pinus Tabulaeformis in Arsenic Sandstone Area[J]. Bulletin of Soiland Water Conservation, 2024, 44(6): 68-76.
DOI：

Fan Dong, Yang Zhenqi, Qin Fucang, et al. Influence of Afforestation Density on Plant Diversity and Soil Physicochemical Properties of Pinus Tabulaeformis in Arsenic Sandstone Area[J]. Bulletin of Soiland Water Conservation, 2024, 44(6): 68-76. DOI： 10.13961/j.cnki.stbctb.2024.06.008.

摘要

[目的

]

研究不同造林密度对油松人工林林下植物群落结构、物种多样性及土壤理化性质的影响，确定适宜的水土保持林经营管理密度，为砒砂岩区油松人工林生态功能提升和可持续发展提供参考依据。[方法

]

以准格尔旗西黑岱徐家门前沟坡面油松人工林为研究对象，通过野外取样调查及室内实验，探究4种造林密度(950，2 000，3 250，4 300株/hm

)条件下林下草本植物群落组成、物种多样性和土壤理化性质的相互关系。[结果

]

①研究区林下草本植物共有9科19属33种，植物种数在造林密度为3 250株/hm

时最多。油松林下草本植物群落主要以禾本科(Gramineae)、菊科(Compositae)、豆科(Fabaceae)、蔷薇科(Rosaceae)植物为主，随着造林密度增加，伴生优势种由阳生、中生性物种向阴生性物种过渡。②不同造林密度处理下，林下草本层物种多样性指数、植株高度、生物量以及土壤有机质、速效氮磷钾含量、土壤含水量均表现为：3 250株/hm

>4 300株/hm

>950株/hm

>2 000株/hm

。③造林密度对林下土壤含水量、有机质以及速效氮磷钾含量影响显著(p

0.05)，对植物物种多样性指数则无显著影响(p>0.05)。在相关性分析中，土壤有机质、速效氮磷钾含量与草本层物种多样性指数之间关系最为密切。[结论

]

准格尔旗砒砂岩区油松人工林造林密度在3 250株/hm

时更利于其林下植物的生长和土壤肥力的改良。

Abstract

[Objective] The effects of different planting densities on plant community structure

species diversity

and soil physicochemical properties of Pinus tabulaeformis plantation were studied

and the appropriate management density of soil and water conservation forest were determined to provide reference for the improvement of ecological function and sustainable development of P. tabulaeformis plantation in the arsenic sandstone area. [Methods] Taking P. tabulaeformis plantation on the slope of Xujiamen Qiangou in Xiheidai of Zhungeer Banner as the research site

the relationship between understory herbaceous plant community composition

species diversity and soil physical and chemical properties under four planting densities (950

2 000

3 250

4 300 plant/hm2) was explored through field sampling and indoor investigation. [Results] ① There were 33 species from 9 families and 19 genera in the study area

and the number of plant species was the highest when the afforestation density was 3 250 plant/hm2. The understory herbaceous plant communities of P. tabulaeformis were mainly Gramineae

Compositae

Fabaceae and Rosaceae. With the increase of afforestation density

the associated dominant species transited from sunny and mesophytic species to shady species. ② The species diversity index

plant height

biomass

soil organic matter

available nitrogen

phosphorus and potassium content

and soil water content in the understory herbaceous layer were 3 250 plants/hm2>4 300 plants/hm2>950 plants/hm2>2 000 plants/hm2. ③ Afforestation density had significant effects on soil water content

organic matter and available nitrogen

phosphorus and potassium content (p<0.05)

but had no significant effects on plant species diversity index (p>0.05). In the correlation analysis

soil organic matter

available nitrogen

phosphorus and potassium content were most closely related to the species diversity index of herbaceous layer. [Conclusion] The planting density of 3 250 plant/hm2 was more conducive to the growth of understory plants and the improvement of soil fertility in the arsenic sandstone area of Zhungeer Banner.

关键词

Keywords

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