| 朱桃川,李泽康,明玉飞,李传福,高舒,董智,焦树英,李永强.膨润土和腐植酸对猪粪堆肥Zn、Cu钝化和微生物群落的影响[J].农业环境科学学报,2024,43(4):937-946. |
| 膨润土和腐植酸对猪粪堆肥Zn、Cu钝化和微生物群落的影响 |
| Effects of bentonite and humic acid on Zn and Cu passivation and microbial communities in pig manure composting |
| 投稿时间：2023-04-10 |
| DOI：10.11654/jaes.2023-0277 |
| 中文关键词: 猪粪堆肥 膨润土 腐植酸 重金属钝化 微生物 |
| 英文关键词: pig manure composting bentonite humic acid heavy metal passivation microorganism |
| 基金项目:山东省自然科学基金项目（ZR2020MC173，ZR2021QD018）；国家“十三五”重点研发计划项目（2018YFD0800403）；山东省农业科技资金（林业科技创新）项目（2019LY005-03） |
| 作者 | 单位 | E-mail | | 朱桃川 | 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心, 山东 泰安 271018 | | | 李泽康 | 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心, 山东 泰安 271018 | | | 明玉飞 | 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心, 山东 泰安 271018 | | | 李传福 | 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心, 山东 泰安 271018 | | | 高舒 | 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心, 山东 泰安 271018 | | | 董智 | 山东农业大学林学院, 山东 泰安 271018 | | | 焦树英 | 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心, 山东 泰安 271018 | jiaoshuying@sdau.edu.cn | | 李永强 | 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心, 山东 泰安 271018 | lyqlinda@163.com |
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| 中文摘要: |
| 为提高堆肥资源化利用，减少农业面源污染，通过单独添加10%膨润土（BT）、10%腐植酸（HA）以及2.5%膨润土+7.5%腐植酸（BH1）、5.0%膨润土+5.0%腐植酸（BH2）和7.5%膨润土+2.5%腐植酸（BH3）混合添加的方式，开展了其对猪粪堆肥重金属Zn、Cu钝化效果及微生物群落组成影响的研究。结果表明：添加膨润土和腐植酸延长了堆肥高温期，BH3处理的可溶性有机碳（DOC）降解率达40.52%，较对照（CK）显著提高12.46个百分点（P<0.05）。堆肥过程中，BH3处理下的Cu生物有效态占比较堆肥前下降12.17个百分点，而Zn可氧化态占比较堆肥前上升29.74个百分点，降幅和升幅均显著高于其余处理（P<0.05）。与CK和单独添加处理相比，混合添加可显著提高重金属Cu、Zn钝化效率，BH3处理对Cu和Zn的钝化率分别达79.84%和36.97%，较CK分别显著提高47.80个百分点和23.09个百分点（P<0.05）。膨润土和腐植酸混合添加，不同程度地促进了厚壁菌门、梭菌纲等参与纤维降解的有益物种相对丰度的升高。BH3处理下拟杆菌门和拟杆菌纲的相对丰度显著高于同时期的其他各处理。研究表明，膨润土和腐植酸与猪粪共堆肥更有利于堆肥腐熟和重金属钝化，混合添加7.5%膨润土和2.5%腐植酸为最佳推荐比例。 |
| 英文摘要: |
| This study aimed to improve the utilization of compost resources and reduce agricultural non-point source pollution. An experiment was conducted a study on the effects of adding 10% bentonite（BT）and 10% humic acid（HA）separately, as well as a mixture of 2.5% bentonite+7.5% humic acid（BH1）, 5.0% bentonite+5.0% humic acid（BH2）, and 7.5% bentonite+2.5% humic acid（BH3）on the passivation effect of heavy metals Zn and Cu and microbial community composition in pig manure composting. The results showed that the addition of bentonite and humic acid prolonged the high-temperature period of composting, and the degradation rate of dissolved organic carbon in the BH3 treatment reached 40.52%, significantly increasing by 12.46 percentage points compared to that of the control treatment （CK）（P<0.05）. In the composting process, the percentage of bioavailable Cu in the BH3 treatment decreased by 12.17 percentage points compared with that before composting, while the percentage of Zn in the oxidized state increased by 29.74 percentage points compared with that before composting, and the decrease and increase were significantly higher than those in the other composting treatments（P<0.05）. Compared to CK and the individual addition treatments, the mixed addition of additives significantly improved the passivation efficiency of heavy metals Cu and Zn. The passivation rates of Cu and Zn treated with BH3 reached 79.84% and 36.97%, respectively, significantly increasing by 47.80 percentage points and 23.09 percentage points compared to that of CK（P<0.05）. The mixed addition of bentonite and humic acid promoted a higher relative abundance of beneficial species involved in fiber degradation, such as Firmicutes and Clostridia, to varying degrees. The relative abundance of Bacteroidota and Bacteroidia in the BH3 treatment was significantly higher than that in other treatments at the same time. The co-composting of bentonite and humic acid with pig manure was more conducive to composting maturity and heavy metal passivation. The best recommended ratio is to add 7.5% bentonite and 2.5% humic acid together. |
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