摘要
猪粪堆肥土地利用是实现猪粪资源化的主要途径,将生物炭作为添加剂用于畜禽粪便好氧堆肥可以有效改善堆肥质量,而生物炭基堆肥的施用对土壤-植物系统的影响值得探究。以土壤-樱桃萝卜系统为研究对象,通过盆栽实验短期施用不同比例的生物炭基猪粪堆肥,考察其对土壤理化性质及重金属含量的影响,并在此基础上对土壤的生态安全进行评价。结果表明:施用生物炭基猪粪堆肥可改善土壤酸化及土壤养分状况,同时还可增加樱桃萝卜的生物量。总体看来,施用生物炭基猪粪堆肥后土壤重金属含量升高,土壤的潜在生态风险增加,但其能在一定程度上降低植物中的重金属含量。6种重金属中,Cd对土壤综合潜在生态风险指数的贡献率为54.64%~62.71%,是影响土壤生态风险的最主要元素。冗余分析表明,pH是对土壤重金属含量影响较大的理化指标,其中Co、Zn的含量受土壤理化指标的影响尤为显著(P<0.05)。
The application of pig manure compost to the soil is a promising way to realize pig manure resource utilization.Adding biochar as an additive to aerobic compost of livestock and poultry manure has been found to effectively enhance the compost quality.Additionally,exploring the application of biochar-based compost on the soil-plant system is worthwhile.In this study,the effects of applying different proportions of biochar-based pig manure compost on soil physical and chemical properties,heavy metal content,and the ecological security of soil were investigated using soil-cherry radish system as the research subject.The results revealed that the application of biochar-based pig manure compost improved soil acidification,enhanced soil nutrient status,and increased the biomass of cherry radish.Overall,the application of biochar-based pig manure compost led to an overall increase in the content of heavy metals in the soil.This increase also resulted in an elevated potential ecological risk of the soil.However,it was found that the application of biochar-based pig manure compost could reduce the content of heavy metals in plants to some extent.Among the six heavy metals studied,Cd was found to contribute the most(54.64%-62.71%)to the comprehensive potential ecological risk index of the soil,making it the most important element affecting soil ecological risk.Redundancy analysis revealed that pH was a significant physical and chemical index that greatly influenced the content of heavy metals in the soil.Specifically,the content of Co and Zn were found to be significantly affected by soil physical and chemical indexes(P<0.05).
作者
李海民
叶枢华
王晋娟
易素瑶
刘强
刘常青
郑育毅
LI Haimin;YE Shuhua;WANG Jinjuan;YI Suyao;LIU Qiang;LIU Changqing;ZHENG Yuyi(College of Environment and Resources Sciences·College of Carbon Neutral Modern Technology,Fujian Normal University,Fujian Key Laboratory of Pollution Control&Resource Reuse,Fuzhou Fujian 350007;The Municipal Waste Resourceization Technology and Management of Fujian College Engineering Research Center,Fuzhou Fujian 350007;School of Geographical Sciences·School of Carbon Neutrality Future Technology,Fujian Normal University,Fuzhou Fujian 350007)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2023年第8期1138-1143,1163,共7页
Environmental Pollution & Control
基金
福建省科学技术厅对外合作项目(No.2021I0010)
福建省科学技术厅计划项目(No.2020N5015)
福建省科学技术厅公益类项目(No.2019R1015-1)。
关键词
生物炭基猪粪堆肥
樱桃萝卜
重金属
速效氮
速效磷
biochar-based pig manure compost
cherry radish
heavy metals
available nitrogen
available phosphorus
