Effects of Biochemical Fulvic Acid on Physical Properties and Water Movement Characteristics

WU Junhu; LI Yuchen; SHAO Fanfan; WANG Zexiang

doi:10.13870/j.cnki.stbcxb.2021.04.022

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Effects of Biochemical Fulvic Acid on Physical Properties and Water Movement Characteristics

更新时间：2025-03-12

- Effects of Biochemical Fulvic Acid on Physical Properties and Water Movement Characteristics
- Vol. 35, Issue 4, Pages: 159-164(2021)
- 作者机构：
  
  西安理工大学省部共建西北旱区生态水利国家重点实验室,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.04.022
  CLC： TQ314.1
- Published：2021
- 稿件说明：
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WU Junhu, LI Yuchen, SHAO Fanfan, et al. Effects of Biochemical Fulvic Acid on Physical Properties and Water Movement Characteristics[J]. 2021, 35(4): 159-164.
DOI：

WU Junhu, LI Yuchen, SHAO Fanfan, et al. Effects of Biochemical Fulvic Acid on Physical Properties and Water Movement Characteristics[J]. 2021, 35(4): 159-164. DOI： 10.13870/j.cnki.stbcxb.2021.04.022.

摘要

为了探究生化黄腐酸（biochemical fulvic acid， BFA）在土壤结构改良方面的应用，通过向土壤中添加BFA，研究其在不同浓度处理下对土壤物理性质及水分运动特性的影响。结果表明：（1）随着BFA施加比例提高，土壤中>0.25 mm的水稳性团聚体数量显著增多，施加比例为20 g/kg时，R0.25、MWD、GMD分别增加284.98%，105.64%，35.06%，分形维数降低2.17%。（2）在温度与pH变化的影响下，随着施加比例增大，Zeta电位的绝对值逐渐增大，施加比例为20 g/kg时，Zeta电位的绝对值分别提高11.77%，59.70%。（3）向土壤中施加BFA可以显著增强土壤的入渗能力，提高累积入渗量与入渗率，随着施加比例的增大，累积入渗量提高28.83%；3种入渗模型均能较好地模拟土壤水分入渗过程。

Abstract

In order to explore the application of biochemical fulvic acid (BFA) in soil structure improvement

the influence of BFA on soil physical properties and water movement characteristics under different concentrations was studied by adding BFA to soil. The results showed that: (1) As the proportion of BFA increased

the number of water-stable aggregates>0.25 mm in soil increased significantly. When the proportion was 20 g/kg

R0.25

mean weight diameter (MWD) and geometric mean diameter (GMD) increased by 284.98%

105.64%

and 35.06%

respectively

the fractal dimension decreased by 2.17%. (2) Under the influence of temperature and pH change

the absolute value of Zeta potential first increased and then decreased as the application ratio increased. When the application ratio was 20 g/kg

the absolute value of Zeta potential increased by 11.77% and 59.70%

respectively. (3) Applying BFA to soil could enhance soil infiltration capacity

increase cumulative infiltration and infiltration rate

and accelerate soil moisture front migration. Moreover

with the increase of application ratio

soil moisture infiltration capacity was significantly enhanced. Cumulative infiltration and was increased by 28.83%. The three infiltration models could simulate the soil water infiltration process well.

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