Effects of Drought Stress and Fly Ash on Fractal Dimension and Fertility of Aeolian Sandy Soil

ZHU Xiaoyue; MA Can; FANG Yan; SHANGGUAN Zhouping

doi:10.13870/j.cnki.stbcxb.2023.05.013

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Effects of Drought Stress and Fly Ash on Fractal Dimension and Fertility of Aeolian Sandy Soil

更新时间：2025-03-12

- Effects of Drought Stress and Fly Ash on Fractal Dimension and Fertility of Aeolian Sandy Soil
- Vol. 37, Issue 5, Pages: 103-110(2023)
- 作者机构：
  
  1. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.05.013
  CLC： S156.92
- Published：2023
- 稿件说明：
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ZHU Xiaoyue, MA Can, FANG Yan, et al. Effects of Drought Stress and Fly Ash on Fractal Dimension and Fertility of Aeolian Sandy Soil[J]. 2023, 37(5): 103-110.
DOI：

ZHU Xiaoyue, MA Can, FANG Yan, et al. Effects of Drought Stress and Fly Ash on Fractal Dimension and Fertility of Aeolian Sandy Soil[J]. 2023, 37(5): 103-110. DOI： 10.13870/j.cnki.stbcxb.2023.05.013.

摘要

探讨不同比例粉煤灰在水分胁迫下与风沙土复配对沙土颗粒分形维数及肥力的影响

为毛乌素沙地土壤肥力提升提供理论依据。采用盆栽控水方法

设置4个粉煤灰水平(F0、F1、F2、F3

分别占风沙土干重的0

10%)和3个水分梯度[W1、W2、W3

分别占田间持水量的(75±5)%

(55±5)%

(35±5)%]

采用分形维数反映在水分和粉煤灰作用下风沙土粒径分布特点

利用主成分分析结合聚类分析方法评价不同处理下风沙土肥力变化。结果表明:(1)在相同水分条件下

风沙土分形维数随着粉煤灰复配比例的增加而增加。(2)在相同粉煤灰复配比例下

风沙土中硝态氮(NO3--N)含量随着水分胁迫利用效率提高

呈现出增加的趋势。(3)粉煤灰和水分处理条件下风沙土中全氮(TN)含量均处于较低水平

在实际生产过程中应考虑配施氮肥。(4)对风沙土肥力综合评价结果表明

粉煤灰10%复配比例效果较好

且在干旱情况下有一定的适用性。

Abstract

In order to explore the effects of different proportions of fly ash composited with aeolian sandy soil on the fractal dimension and fertility of sand particles under drought stress and to provide a theoretical basis for fertility promotion of Mu Us sandy land

four fly ash levels (F0

and F3

accounting for 0

5% and 10% of dry weight of aeolian sandy soil

respectively) and three water levels[W1

W2 and W3

accounting for (75±5)%

(55±5)% and (35±5)% of the field water capacity

respectively] were set up in the experiments

and a pot cultivation method was used for water control. The fractal dimension was used to reflect the particle size distribution of aeolian sandy soil under the action of water and fly ash. And the principle component analysis and hierarchical cluster analysis method were used to evaluate the fertility change of aeolian sandy soil under different treatments. The results showed that:(1) Under the same water condition

the fractal dimension of aeolian sandy soil increased with the increasing of fly ash proportion. (2) Under the same proportion of fly ash

the content of nitrate nitrogen (NO3--N) of aeolian sandy soil showed an increasing trend with the improvement of drought stress utilization efficiency. (3) The total nitrogen (TN) content of aeolian sandy soil was at low level under treatments of fly ash and drought stress. Nitrogen fertilizer application should be considered in the actual production process. (4) The comprehensive evaluation results of aeolian sandy soil showed that 10% composite ratio of 10% fly ash had good effect and it had certain applicability in drought situations.

关键词

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