Effects of Biochar and Reductive Soil Disinfestation on Dissolved Organic Matter in Facility Vegetable Soils

YAN Daihong; JI Chunyang; HE Yunhua; MA Yapei; MA Hongliang; GAO Ren; YIN Yunfeng

doi:10.13870/j.cnki.stbcxb.2022.02.036

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Effects of Biochar and Reductive Soil Disinfestation on Dissolved Organic Matter in Facility Vegetable Soils

更新时间：2024-11-07

- Effects of Biochar and Reductive Soil Disinfestation on Dissolved Organic Matter in Facility Vegetable Soils
- Vol. 36, Issue 2, Pages: 283-291(2022)
- 作者机构：
  
  1. 福建师范大学湿润亚热带山地生态国家重点实验室培育基地,福州,350007
  2. 福建师范大学地理科学学院,福州,350007
  3. 福清市现代农业发展中心, 福建福清,350300
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.02.036
  CLC： X53;S153.6
- Published：2022
- 稿件说明：
移动端阅览
YAN Daihong, JI Chunyang, HE Yunhua, et al. Effects of Biochar and Reductive Soil Disinfestation on Dissolved Organic Matter in Facility Vegetable Soils[J]. 2022, 36(2): 283-291.
DOI：

YAN Daihong, JI Chunyang, HE Yunhua, et al. Effects of Biochar and Reductive Soil Disinfestation on Dissolved Organic Matter in Facility Vegetable Soils[J]. 2022, 36(2): 283-291. DOI： 10.13870/j.cnki.stbcxb.2022.02.036.

摘要

利用田间试验

探讨生物炭与强还原处理(RSD)对退化设施蔬菜土壤可溶性有机质(DOM)的影响。处理为对照(CK)、生物炭修复(BC)、淹水(SF)、淹水覆膜(SFF)、强还原修复(RSD)、RSD与生物炭联合修复(RSD+BC)

对比研究不同处理对0-20

20-40 cm土壤DOM含量及光谱特征的影响。结果表明:0-20 cm土层中

相比CK

其他处理土壤pH均显著增加

BC、SF、SFF和RSD处理的NO3--N含量分别降低31.9%

59.4%

40.0%和22.3%(P<0.05)。RSD处理可溶性有机氮(DON)含量显著提高;RSD和RSD+BC处理的可溶性有机碳(DOC)含量分别显著提高188.2%和201.4%(P<0.05)

DOC/DON比值增加

但使DOM芳香化程度和腐殖化程度降低

结构变得简单。土壤DOM组分以类富里酸和类腐殖酸物质为主

且RSD+BC处理的荧光强度达到最大。对于20-40 cm土层

各处理的荧光强度和DOC含量均显著降低

但相比CK

RSD和RSD+BC处理的DOC含量仍显著增加(P<0.05)

而BC和RSD+BC处理使得DON含量降低。综上

RSD+BC联合修复短期内可以减缓土壤酸化

提升土壤DOC含量

但降低土壤DOM芳香化和腐殖化程度。研究结果可为退化设施蔬菜地土壤修复和环境风险评价提供科学参考。

Abstract

A field experiment was conducted to investigate the effects of reductive soil disinfestation (RSD) and biochar (BC) application on dissolved organic matter (DOM) in degraded vegetable soils. In this study

six treatments

i.e.

(1)soil untreated (CK)

(2) soil incorporated with 1% (w/w) biochar (BC)

(3) soil flooded (SF)

(4) soil flooded and covered with plastic film (SFF)

(5) soil incorporated with 1% (w/w) alfalfa residue

flooded and covered with plastic film (RSD)

and (6) soil incorporated with 1% (w/w) alfalfa residue and 1% (w/w) biochar

flooded and covered with plastic film (RSD+BC) were performed to compare the effects of different treatments on DOM content and its spectral characteristics in soil 0-20 cm and 20-40 cm of layers. The results showed that for 0-20 cm soil

compared with CK

soil pH value of other treatments was increased significantly

and NO3--N contents of BC

SFF

and RSD treatments were significantly decreased by 31.9%

59.4%

40.0%

and 22.3%

respectively. Soil dissolved organic nitrogen (DON) content was significantly increased by RSD treatment (P<0.05). The contents of dissolved organic carbon (DOC) in RSD and RSD+BC treatments were significantly increased by 188.2% and 201.4% (P<0.05)

respectively

whereas the degree of DOM aromatization and humification was decreased under the two treatments. Soil DOM was mainly composed of fulvic acid-like and humic acid-like material

and the fluorescence intensity of DOM in RSD+BC treatment reached the maximum. For 20-40 cm soil

the fluorescence intensity and DOC contents of all treatments were decreased significantly compared with that of 0-20 cm soil. However

compared with CK

the DOC contents in RSD and RSD+BC treatments were still increased significantly (P<0.05)

while the DON contents in BC and RSD+BC treatments were decreased. These results implied that the combination of biochar and RSD could further alleviate soil acidification in the short period

improve soil DOC content

and reduce the degree of soil DOM aromatization and humification. This study provides scientific guidance for the remediation and environmental risk assessment of degraded facility vegetable soil.

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