晋西黄土区不同密度油松人工林保育土壤功能评价

兰道云; 毕华兴; 赵丹阳; 王宁; 云慧雅; 王珊珊; 崔艳红

doi:10.13870/j.cnki.stbcxb.2022.02.025

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晋西黄土区不同密度油松人工林保育土壤功能评价

更新时间：2024-11-07

- 晋西黄土区不同密度油松人工林保育土壤功能评价
- Evaluation on Soil Conservation Function of
- 水土保持学报 2022年36卷第2期页码：189-196
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 山西吉县森林生态系统国家野外科学观测研究站,北京,100083
  3. 水土保持国家林业局重点实验室(北京林业大学),北京,100083
  4. 北京市水土保持工程技术研究中心(北京林业大学),北京,100083
  5. 林业生态工程教育部工程研究中心(北京林业大学),北京,100083
- 作者简介：
  
  [ "兰道云(1996-),男,硕士研究生,主要从事林业生态工程研究。E-mail:527663009@qq.com" ]
- 基金信息：
  
  国家自然科学基金项目“晋西黄土区水土保持林林分结构与功能耦合机理研究”（31971725）,“黄土区土壤-地表-地下水文多维耦合过程及植被调控机制”（U2243202）国家重点研发计划项目（2016YFC0501704）
- DOI：10.13870/j.cnki.stbcxb.2022.02.025
  中图分类号： S714
- 纸质出版：2022
- 稿件说明：
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兰道云, 毕华兴, 赵丹阳, 等. 晋西黄土区不同密度油松人工林保育土壤功能评价[J]. 水土保持学报, 2022,36(2):189-196.

LAN Daoyun, BI Huaxing, ZHAO Danyang, et al. Evaluation on Soil Conservation Function of[J]. 2022, 36(2): 189-196.
兰道云, 毕华兴, 赵丹阳, 等. 晋西黄土区不同密度油松人工林保育土壤功能评价[J]. 水土保持学报, 2022,36(2):189-196. DOI： 10.13870/j.cnki.stbcxb.2022.02.025.

LAN Daoyun, BI Huaxing, ZHAO Danyang, et al. Evaluation on Soil Conservation Function of[J]. 2022, 36(2): 189-196. DOI： 10.13870/j.cnki.stbcxb.2022.02.025.

摘要

研究晋西黄土区不同密度油松林保育土壤功能变化规律及差异性

评价其保育土壤功能

以加强林分管理和生态恢复建设。以山西吉县蔡家川流域4种不同密度(925

1 325

1 750

2 250株/hm2)油松人工林为研究对象

对其土壤容重、孔隙度等物理性质、有机质等化学性质以及坡面径流泥沙量进行测定和分析

确定了12项评价指标

采用熵权法(EWM)对各密度油松林地的保育土壤功能进行综合评价。结果表明:(1)4种林分密度的油松人工林

土壤容重、总孔隙度、非毛管孔隙度、毛管孔隙度、全氮、全磷、氨氮、硝氮和速效磷均存在显著差异(P<0.05);(2)林分密度变化会不同程度地改变油松林土壤物理性质、土壤养分和径流泥沙量等12项指标

其中土壤容重、径流量、泥沙量均随林分密度增大呈现先下降后上升的趋势;土壤有机质、全氮、全磷、硝氮、速效磷

随林分密度增大呈先增加后减少的趋势;(3)不同密度油松林地的土壤物理结构、土壤肥力和产流产沙均随密度变化呈现一定的变化规律

随着林分密度增大

土壤结构改良状况和土壤肥力呈现先上升后下降的趋势;径流泥沙量表现为先减小后增大地趋势;(4)对不同密度油松人工林保育土壤功能评价表明

4种密度油松林中

随着油松林林分密度的增加

保育土壤功能呈现先增强后减弱的趋势。密度为1 750株/hm2的油松林地保育土壤功能相对较好。从保育土壤角度出发

建议将1 750株/hm2作为晋西黄土区油松人工林经营密度

该密度油松林能较好保持水土

改善林地土壤质量。

Abstract

This paper aimed to study the changing laws and differences of soil conservation functions of Pinus tabulaeformis forests with different densities in the loess area of western Shanxi Province

and to evaluate their soil conservation function

so as to strengthen forest stand management and ecological restoration. Four kinds of P. tabulaeformis plantations with different densities (925 plant/hm2

1 325 plant/hm2

1 750 plant/hm2 and 2 250 plant/hm2) in the Caijiachuan watershed of Jixian County

Shanxi Province were taken as the research objects. The soil bulk density

porosity and other physical properties

organic matter and other chemical properties as well as the amount of slope runoff and sediment were measured and analyzed

and 12 evaluation indicators were determined

and the entropy weight method (EWM) was used to evaluate comprehensively the soil conservation functions of each P. tabulaeformis forests. The results showed that:(1) There were significant differences in soil bulk density

total porosity

non-capillary porosity

capillary porosity

total nitrogen

total phosphorus

ammonia nitrogen

nitrate nitrogen and available phosphorus among the four kinds of P. tabulaeformis plantation (P<0.05). (2) The change of stand density would change the 12 indicators of soil physical properties

soil nutrients and runoff and sediment volume of the P. tabulaeformis forest. Among them

soil bulk density

runoff and sediment volume all decreased first and then increased with the increasing of forest density. Soil organic matter

total nitrogen

total phosphorus

nitrate nitrogen and available phosphorus showed the opposite tendency with the increasing of forest density. (3) The soil physical structure

soil fertility

runoff and sediment yield of different P. tabulaeformis forests all showed certain change laws with the change of density. The improvement of soil structure and soil fertility increased first and then decreased with the increasing of forest density. With the increasing of forest density

the amount of runoff and sediment decreased first and then increased. (4) The evaluation of soil conversation function of P. tabulaeformis plantations with different densities showed that the soil conservation function of P. tabulaeformis forest increased firstly and then decreased with the increasing of density. The conservation soil function of P. tabulaeformis forest land with a density of 1 750 plant/hm2 was relatively good. From the perspective of soil conservation

it was recommended that 1 750 plant/hm2 should be used as the management density of P. tabulaeformis plantations in the loess area of western Shanxi. This density could better maintain water and soil and improve the soil quality of forest land.

关键词

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