Effects of Humic Acid on Nutrient Release from Coal Gangue

YU Jian; ZHOU Guang; WANG Mengtian; FANG Li; ZHU Kaiqun; XIE Jinfei; YU Yuanchun; XU Zhanjun

doi:10.13870/j.cnki.stbcxb.2018.03.055

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Effects of Humic Acid on Nutrient Release from Coal Gangue

更新时间：2025-03-12

- Effects of Humic Acid on Nutrient Release from Coal Gangue
- Vol. 32, Issue 3, Pages: 364-368(2018)
- 作者机构：
  
  1. 安徽师范大学国土资源与旅游学院, 安徽省自然灾害过程与防控省级实验室,安徽,芜湖,241003
  2. 南京林业大学生物与环境学院,南京,210037
  3. 山西农业大学资源与环境学院, 山西太谷,030801
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.03.055
  CLC：
- Published：2018
- 稿件说明：
移动端阅览
YU Jian, ZHOU Guang, WANG Mengtian, et al. Effects of Humic Acid on Nutrient Release from Coal Gangue[J]. 2018, 32(3): 364-368.
DOI：

YU Jian, ZHOU Guang, WANG Mengtian, et al. Effects of Humic Acid on Nutrient Release from Coal Gangue[J]. 2018, 32(3): 364-368. DOI： 10.13870/j.cnki.stbcxb.2018.03.055.

摘要

煤矸石是一种潜在的资源，在现有技术条件下无法快速处理的大量煤矸石裸露堆放造成占地及生态环境问题，已成为矿区生态环境治理关注的热点。煤矸石山的植被恢复是其原位保存的最有效办法。腐殖酸作为腐殖质的主要组成成分对改善不利的植物生长环境具有积极作用。为探讨腐殖酸对煤矸石养分释放的影响，采用室内培养试验方法，研究了添加不同浓度腐殖酸及不同培养时间下煤矸石的pH、电导率（EC）变化及氮、磷、钾速效养分的释放特征。结果表明：相对于不添加腐殖酸处理（CK），添加腐殖酸的煤矸石pH明显升高，最高达到7.77，而EC急剧下降，平均为126.13 μS/cm，比CK的平均EC下降77.81%；添加腐殖酸的煤矸石速效磷和碱解氮均大幅度增加，速效磷含量平均为CK的2.33倍，碱解氮含量最高达到CK的1.94倍；速效钾含量相对于CK也有一定增加；添加的腐殖酸浓度越大，促进煤矸石养分释放效果越好；在培养期间，各项研究指标值总体表现"V"和"N"形，在后期逐渐呈现稳定作用趋势。煤矸石具有一定养分供给潜力，腐殖酸添加到煤矸石中可以提高其植物养分可获得性。

Abstract

Coal gangue is a potential resource. A large number of coal gangues not able to be disposed quickly due to the existing technical conditions occupied land and caused ecological environment problem

which has become a hot issue of ecological environment conservation in coal mining area. The vegetation restoration of coal gangue mountain is the best way for in-situ conservation and environmental protection. Humic acid (HA)

as the main component of humus

has a positive effect on improving the unfavorable plant growth environment. To discuss the effects of HA on nutrient release from coal gangue

an experiment of incubator at constant temperature was conducted to study the characteristics of the pH and electrical conductivity (EC) of coal gangue and the release of alkali hydrolysable nitrogen (AN)

available phosphorus (AP) and available potassium (AK) from gangues under different humic acid concentrations and incubation durations. Compared with treatment without HA (CK)

the pH of coal gangue with HA increased significantly

the highest value reached 7.77

while the EC value decreased sharply

with an average of 126.13 μS/cm

dropped by 77.81% compared with the average EC value of CK. All the AP and AN of coal gangue added with HA increased greatly. The content of AP was 2.33 times that of CK

and the content of AN reached 1.94 times that of CK. The same is true of AK. The greater the concentration of humic acid added

the better the effect of promoting the release of nutrients from coal gangue. During the incubation

all the indicators for study presented a change characterized as "V" or "N"

and in the later stage

the change gradually showed trend of stability. Coal gangue has a certain potential for nutrient supply

therefore

adding humic acid to coal gangue can improve the availability of plant nutrients.

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