Change of Soil Properties and Related Fractal Features During Forestation and Sand Fixation by Straw Checkerboard:A Case Study in Southeast Edge of Tengger Desert

CHANG Haitao; LIU Rentao; LIU Jianan; ZHAO Juan; LUO Yaxi; ZHANG jing; MA Ji

doi:10.13870/j.cnki.stbcxb.2018.06.010

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Change of Soil Properties and Related Fractal Features During Forestation and Sand Fixation by Straw Checkerboard:A Case Study in Southeast Edge of Tengger Desert

更新时间：2025-03-12

- Change of Soil Properties and Related Fractal Features During Forestation and Sand Fixation by Straw Checkerboard:A Case Study in Southeast Edge of Tengger Desert
- Vol. 32, Issue 6, Pages: 58-65(2018)
- 作者机构：
  
  1. 宁夏大学西北退化生态系统恢复与重建教育部重点实验室,银川,750021
  2. 宁夏大学农学院,银川,750021
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.06.010
  CLC： S151.3
- Published：2018
- 稿件说明：
移动端阅览
CHANG Haitao, LIU Rentao, LIU Jianan, et al. Change of Soil Properties and Related Fractal Features During Forestation and Sand Fixation by Straw Checkerboard:A Case Study in Southeast Edge of Tengger Desert[J]. 2018, 32(6): 58-65.
DOI：

CHANG Haitao, LIU Rentao, LIU Jianan, et al. Change of Soil Properties and Related Fractal Features During Forestation and Sand Fixation by Straw Checkerboard:A Case Study in Southeast Edge of Tengger Desert[J]. 2018, 32(6): 58-65. DOI： 10.13870/j.cnki.stbcxb.2018.06.010.

摘要

以腾格里沙漠东南缘草方格人工固沙植被区为研究对象，分别选取流动沙地、4年和30年固沙植被区为研究样地，于春季、夏季和秋季研究了草方格造林固沙过程中土壤性质变化及分形特征。结果表明：（1）土壤含水量与土壤pH既受到不同固沙年限的影响，亦受到季节变化的调控。（2）流动沙地、4年和30年固沙植被区土壤电导率分别为77.84~82.34，86.04~114.68，113.80~168.66 μS/m，土壤有机碳含量分别为0.86~1.74，1.30~1.52，7.96~17.36 g/kg，土壤全氮含量分别为0.18~0.32，0.24~0.26，0.44~0.78 g/kg。（3）仅流动沙地土壤具有粗沙粒成分，含量占0.50%~0.53%。流动沙地、4年和30年固沙植被区土壤中沙粒含量分别为40.42%~43.82%，14.36%~17.17%和12.01%~14.75%，土壤细沙粒含量分别为55.44%~58.84%，80.15%~83.19%和42.55%~53.30%，土壤极细沙粒含量分别为0.24%~0.31%，2.45%~3.33%和15.85%~21.35%。仅30年固沙植被区土壤具有黏粒和粉粒成分，含量分别为0.84%~1.33%和15.16%~22.75%。（4）土壤粗沙粒与土壤电导率间呈负相关性（P<0.05），土壤细沙粒、中沙粒均与土壤电导率、有机碳、全氮、碳氮比之间呈显著负相关性（P<0.01），而土壤黏粒、粉粒、极细沙粒均与土壤电导率、有机碳、全氮、碳氮比呈显著正相关性（P<0.01）。（5）土壤分形维数介于0~3。流动沙地、4年和30年固沙植被区土壤分形维数分别为0.55~0.82，1.57~1.67和2.37~2.59。（6）土壤分形维数与土壤粗沙粒和中沙粒间呈负相关性（P<0.05），与土壤黏粒、粉粒和极细沙粒间呈显著正相关性（P<0.01），而与土壤细沙粒间无相关性（P>0.05）。研究表明，在腾格里沙漠地区扎设草方格并进行人工造林固沙，有利于改善土壤质地，促使土壤理化性质向良好的方向发展，促进土壤质量提升和实现沙漠化防治。

Abstract

In Shapotou districts of southeastTengger Desert

we selected the flow sand

4 and 30 years sand fixing areas within straw checkerboard as the research plots to study the soil properties and fractal characteristics during the process of forestation and sand fixation by straw checkerboard across seasons. The results showed that:(1) Soil moisture content and soil pH were affected by both timing of sand fixation and seasonal variations. (2)Soil electrical conductivity of the flow sand

the 4 year and the 30 years sand fixing vegetation area was 77.84~82.34

86.04~114.68 and 113.80~168.66 μS/m

respectively

and soil organic carbon of the three kinds of plots was 0.86~1.74

1.30~1.52 and 7.96~17.36 g/kg

respectively

and soil total nitrogen was 0.18~0.32

0.24~0.26

and 0.44~0.78 g/kg

respectively.(3) Coarse sand was found only in the flow sand

and the content was 0.50%~0.53%. Medium sand content of the flow sand

the 4 year and the 30 years sand fixing vegetation area was 40.42%~43.82%

14.36%~17.17% and 12.01%~14.75%

respectively

and fine sand content was 55.44%~58.84%

80.15%~83.19% and 42.55%~53.30%

respectively

and very find sand was 0.24%~0.31%

2.45%~3.33% and 15.85%~21.35%

respectively. Clay and silt were found in the 30 years sand fixing vegetation area

and the content was 0.84%~1.33% and 15.16%~22.75%

respectively. (4) There was a negative correlation between coarse sand and soil electrical conductivity(P<0.05)

and fine sand and medium sand both showed significant negative correlation with electrical conductivity

organic carbon

total nitrogen and carbon-nitrogen ratio(P<0.01). Clay

silt and very fine sand all showed significant positive correlation with soil electrical conductivity

organic carbon

total nitrogen and carbon-nitrogen ratio(P<0.01). (5)The soil fractal dimension was 0~3

soil fractal dimensionof the flow sand

the 4 year and the 30 years sand fixing vegetation area was 0.55~0.82

1.57~1.67 and 2.37~2.59

respectively. (6)There was a negative correlation between soil fractal dimension and coarse sand

medium sand(P<0.05)

which had significant positive correlation with clay

silt

and very fine sand (P<0.01)

but had no correlation with soil fine sand (P>0.05). It was concluded that the stabilization of flows and by straw checkerboard and artificial forestation and sand fixation in southeast Tengger Desert could improve soil texture

promotethe better development of soil physical-chemical properties and the improvement of soil quality

and prevent and control desertification.

关键词

Keywords

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