Effects of Plant Density Regulation on Soil Physical Properties and Plant Diversity of Plantations in Yellow River Flood Plain of Northern Shandong Province

Wang Lichao; Xia Jiangbao; Zhao Yuyao; Chen Ping

doi:10.13961/j.cnki.stbctb.2022.03.007

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Effects of Plant Density Regulation on Soil Physical Properties and Plant Diversity of Plantations in Yellow River Flood Plain of Northern Shandong Province

- Effects of Plant Density Regulation on Soil Physical Properties and Plant Diversity of Plantations in Yellow River Flood Plain of Northern Shandong Province
- Bulletin of Soiland Water Conservation Vol. 42, Issue 3, Pages: 43-48(2022)
- 作者机构：
  
  1. 滨州学院山东省黄河三角洲生态环境重点实验室,山东,滨州,256603
  2. 山东农业大学林学院泰山森林生态系统国家定位观测研究站黄河下游森林培育国家林业和草原局重点实验室,山东,泰安,271018
  3. 利津县王庄沙区林场建设发展服务中心,山东,东营,257400
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.03.007
  CLC： S725.6
- Published：2022
- 稿件说明：
移动端阅览
Wang Lichao, Xia Jiangbao, Zhao Yuyao, et al. Effects of Plant Density Regulation on Soil Physical Properties and Plant Diversity of Plantations in Yellow River Flood Plain of Northern Shandong Province[J]. Bulletin of Soiland Water Conservation, 2022, 42(3): 43-48.
DOI：

Wang Lichao, Xia Jiangbao, Zhao Yuyao, et al. Effects of Plant Density Regulation on Soil Physical Properties and Plant Diversity of Plantations in Yellow River Flood Plain of Northern Shandong Province[J]. Bulletin of Soiland Water Conservation, 2022, 42(3): 43-48. DOI： 10.13961/j.cnki.stbctb.2022.03.007.

摘要

[目的] 分析黄泛平原林分密度调控对不同林分土壤物理性质和植物多样性的影响，为优化林分生长，改良土壤物理性质和增加林下植被多样性提供理论依据。[方法] 以山东省东营市利津县王庄沙区林场相同立地条件下3种人工林（白蜡、旱柳、白榆）为研究对象，调查不同密度（株行距3 m×3 m，3 m×6 m）各林分土壤容重、孔隙度、持水量和植被生长情况。[结果] ①林分密度由3 m×3 m降至3 m×6 m，两种林分密度均可增加各林分的冠幅、胸径和树高；林下植物生物量及其多样性，与其他林分相比，白榆人工林的林分因子各指标增加最为显著。②林分密度3 m×6 m降低了同一土层非毛管孔隙度，增加了同一土层毛管孔隙度和总孔隙度。③林分密度3 m×6 m显著提高了白蜡、旱柳、白榆3种人工林0—20 cm土层的饱和持水量和毛管持水量（p<0.05），显著提高了白榆人工林20—40 cm土层的土壤质量含水量（p<0.05）。[结论] 低林分密度调控，白榆人工林林下植物生物量、多样性的增加最明显；白蜡人工林林下土壤毛管孔隙度和总孔隙度提高最明显；白蜡、白榆、旱柳人工林0—20 cm土层的土壤饱和持水量和毛管持水量均显著提高，且白榆人工林20—40 cm土层的土壤质量含水量的提高显著。

Abstract

[Objective] The effects of plant density regulation on soil physical properties and plant diversity of different plant stands in the Yellow River flood plain were analyzed in order to provide a theoretical basis for optimizing stand growth

improving soil physical properties

and increasing understory vegetation diversity.[Methods] Three plantations (Fraxinus chinensis

Salix matsudana

Ulmus pumila) growing under the same site conditions in the Wangzhuang Forest Farm

Lijin County

Dongying City

Shandong Province were selected as the research objects. The soil bulk density

porosity

water-holding capacity

and vegetation growth of different stand densities (3 m×3 m

3 m×6 m) were investigated.[Results] ① Reducing stand density to 3 m×6 m increased crown width

diameter at breast height

and tree height of each stand

as well as the biomass and diversity of understory plants. The increase of each stand factor index in the U. pumila plantation was significantly greater than observed for the other stands. ② The stand density of 3 m×6 m reduced the non-capillary porosity of the same soil layer

and increased the capillary porosity and total porosity of the same soil layer. ③ The stand density of 3 m×6 m significantly increased the saturated water-holding capacity and capillary water-holding capacity of the 0-20 cm soil layer in F. chinensis

S. matsudana

and U. pumila plantations (p<0.05)

and significantly increased the soil moisture content of the 20-40 cm soil layer in the U. pumila plantation (p<0.05).[Conclusion] Decreasing stand density resulted in a significant increase in biomass and diversity of understory plants in the U. pumila plantation

and soil capillary porosity and total porosity in the F. chinensis plantation were also increased significantly. Decreasing stand density also significantly increased soil saturated water-holding capacity and capillary water-holding capacity in the 0-20 cm soil layer of F. mandshurica

U. pumila

and S. matsudana plantations

and soil water content in the 20-40 cm soil layer of the U. pumila plantation was also significantly increased.

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