中国农业大学学报2024，Vol.29Issue(6)：219-229,11.DOI:10.11841/j.issn.1007-4333.2024.06.22
长期施用炭基有机肥对土壤铜形态及微生物群落的影响
Effects of biochar-based organic fertilizer on Cu speciation and microbial community in soils
摘要
Abstract
To clarify the mitigation effect of biochar-based organic fertilizer on soil heavy metal pollution and its improvement effect on soil microecology,a field plot experiment was conducted to investigate the effects of three biochar-based organic fertilizers(T1,T2 and T3)on the soil nutrition,Cu speciation and microbial community after 5-year continuous application.T1,T2 and T3 were mixtures of organic manure and biochar,and the weight percentage of biochar were 3％,6％and 9％,respectively.The control group was organic manure(CK1).All treatments had equal nitrogen input.Compared with CK1,T1,T2 and T3 treatments significantly increased soil pH by 0.65,0.86 and 0.90 units,respectively;T2 and T3 significantly increased soil ammonium nitrogen by 1.94 times and 1.66 times,and T3 significantly increased soil organic carbon by 22.7％;Only T3 treatment had a significant effect on the distribution rate of exchangeable and reducible Cu,which were decreased by 21.9％and 45.1％,respectively;T2 and T3 treatments significantly increased soil basal respiration rate(51.5％and 37.6％,respectively),and T3 treatment significantly increased soil bacterial content,gram-negative bacteria and total PLFAs(15.5％,16.8％and 17.2％,respectively).Redundancy analysis indicated that soil pH and total Cu were the main environmental factors affected the variation in soil microbial community composition.In summary,T3 treatment had the best effects on improving soil chemical properties,reducing the availability of heavy metal Cu,and increasing the activity and quantity of soil microorganisms.关键词
重金属污染/炭基有机肥/磷脂脂肪酸/土壤呼吸Key words
biochar-based organic fertilizer/heavy metal pollution/phospholipid fatty acids/soil respiration分类
农业科技引用本文复制引用
李艳春,叶菁,刘岑薇,林怡,王义祥..长期施用炭基有机肥对土壤铜形态及微生物群落的影响[J].中国农业大学学报,2024,29(6):219-229,11.基金项目
福建省科技厅公益项目(2021R1021003) （2021R1021003）
中央引导地方科技发展专项(2021L3021) （2021L3021）
