Effects of Biochemical Fulvic Acid Application on Water and Salt Transport Characteristics and Basic Ion Composition of Saline-alkaline Soil

SUN Yan; WANG Chunhong; WANG Quanjiu; QU Zhi; WANG Jian; ZHANG Xiyuan

doi:10.13870/j.cnki.stbcxb.2022.04.029

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Effects of Biochemical Fulvic Acid Application on Water and Salt Transport Characteristics and Basic Ion Composition of Saline-alkaline Soil

更新时间：2025-03-12

- Effects of Biochemical Fulvic Acid Application on Water and Salt Transport Characteristics and Basic Ion Composition of Saline-alkaline Soil
- Vol. 36, Issue 4, Pages: 228-235(2022)
- 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.2022.04.029
  CLC： S156.4
- Published：2022
- 稿件说明：
移动端阅览
SUN Yan, WANG Chunhong, WANG Quanjiu, et al. Effects of Biochemical Fulvic Acid Application on Water and Salt Transport Characteristics and Basic Ion Composition of Saline-alkaline Soil[J]. 2022, 36(4): 228-235.
DOI：

SUN Yan, WANG Chunhong, WANG Quanjiu, et al. Effects of Biochemical Fulvic Acid Application on Water and Salt Transport Characteristics and Basic Ion Composition of Saline-alkaline Soil[J]. 2022, 36(4): 228-235. DOI： 10.13870/j.cnki.stbcxb.2022.04.029.

摘要

生化黄腐酸（biochemical fulvic acid，BFA）在改善土壤结构、促进作物生长与提高肥效方面均表现出较好的应用价值。为探讨添加BFA对盐碱土水盐运移规律的影响，揭示BFA淋盐增效机理，基于一维垂直土柱入渗试验，对不同BFA添加量（0，1，2，4，8 g/kg）条件下盐碱土的水盐运移特征、入渗模型参数及土壤交换性盐基离子组成进行了研究。结果表明，入渗条件下增加BFA能够降低土壤水分入渗速率，延长入渗时间，提高土壤保水性能。Kostiakov模型、Philip模型和代数模型均能较好地描述入渗过程，模型参数中经验系数（K）、吸渗率（S）和综合形状系数（α）均随BFA添加量的增加呈先减小后增加的变化趋势。与对照相比，添加BFA均能提高土壤持水效率和相对脱盐率，在2 g/kg BFA添加量条件下，0—20 cm土层内土壤平均体积含水率提高3.38%，平均持水效率提高10.65%，相对脱盐率提高36.32%。此外，相比对照，添加BFA后土壤交换性盐基总量（total exchangeable base，TEB）均有所增加，TEB组成中Ca2+浓度增加，Na+浓度降低。因此，在盐碱土中添加BFA能够显著影响土壤水分入渗和水盐运移特征，改善土壤水盐分布状况，对盐碱土具有较好的保水和脱盐效果，且添加BFA后土壤TEB显著增加，能够显著改善土壤交换性盐基离子组成，提升土壤质量。

Abstract

Biochemical fulvic acid (BFA) has shown favorable application value in improving soil structure

promoting crop growth and improving fertilizer efficiency. In order to explore the effect of BFA addition on the water-salt migration law of saline-alkali soil

and reveal the salt leaching efficiency mechanism of BFA

this research based on one-dimensional vertical soil column infiltration experiment

to investigate the water-salt migration characteristics

the parameters of the infiltration model

and the composition of soil exchangeable base ions of saline alkali soil under different BFA application amounts (0

4 and 8 g/kg). The results showed that the application of BFA under infiltration conditions could reduce the soil water infiltration rate

prolong infiltration time and improve soil water retention performance. The Kostiakov model

Philip model and algebraic model could all describe the soil infiltration process well. The empirical coefficient K

the absorption rate S and the comprehensive shape coefficient α in the models all showed a trend of decreasing and then increasing with the increasing of BFA application amount. Compared with the control

the application of BFA could improve the soil water holding efficiency and relative desalinization rate. Under the condition of 2 g/kg BFA addition

the average volume water content

average water holding efficiency and relative desalinization rate in 0-20 cm soil layer increased by 3.38%

10.65% and 36.32%

respectively. In addition

compared with the control

the total exchangeable base (TEB) of soil increased after adding BFA

and the concentration of Ca2+ in TEB increased

while the concentration of Na+ decreased. Therefore

BFA application could significantly affect soil water infiltration and water and salt transport characteristics

improve the distribution of soil water and salt

and had favorable effect on water retention and desalination of saline soil. Moreover

studies have found that BFA application could significantly increase soil TEB

significantly improve soil exchangeable base ion composition and improve soil quality.

关键词

Keywords

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