中国生态农业学报（中英文）2026，Vol.34Issue(5)：925-935,11.DOI:10.12357/cjea.20250842
有机替代下配施生物炭促进土壤质量提升和水稻养分利用
Biochar addition in combination with organic fertilizer substitution could effectively improve soil quality and nutrient utilization of rice
摘要
Abstract
Clarifying the effects of organic fertilizer substitution and biochar or biochar-based fertilizer application on the paddy soil quality and rice grain yields can provide a theoretical basis for the sustainable utilization of paddy fields in the middle and lower reaches of the Yangtze River in China.Pot experiments were conducted to explore the effects of biochar or biochar-based fertilizer application in combination with organic fertilizer substitution on soil quality,rice growth,and nitrogen use efficiency.This study included the following eight treatments:control(CK),conventional fertilization(CF),biochar addition(BC),organic fertilizer substitution(OF),biochar-based fertilizer addition(BF),conventional fertilization with biochar(CF+BC),organic fertilizer substitution with biochar(OF+BC),and organic fertilizer substitution with biochar-based fertilizer(OF+BF).The results revealed that compared with that under CK,the pH under BC,BF,OF+BC,and OF+BF significantly increased by 0.22,0.13,0.26,and 0.18,respectively.The soil organic carbon content significantly increased by 8.8%-17.8%in the treatments with organic fertilizer,biochar or biochar-based fertilizer application and the total nitrogen content significantly increased by 9.3%-12.7%in the treatments with organic fertilizer or chemical fertilizer application compared with that under CK,with OF+BC showing the largest increase.Compared with CK,other treatments showed significant increases of 14.3%-35.9%,5.5%-19.9%,and 14.2%-54.0%in the content of available phosphorus,available potassium,and microbial biomass carbon(MBC),respectively,and OF,CF+BC,OF+BC,and OF+BF significantly increased the available nitrogen content by 24.3%-41.5%,with OF+BC showing the largest increase.The trends of soil urease,sucrase,alkaline phosphatase,acidic phosphatase,and catalase activities among treatments were similar to that of MBC,and there was no significant difference between OF+BC and OF+BF.Compared with CK,other treatments significantly increased the soil quality index,rice grain yield,and the plant accumulation of nitrogen,phosphorus,and potassium by 78.3%-209.1%,27.3%-93.0%,30.2%-117.3%,32.6%-101.9%,and 37.1%-104.0%,respectively,with OF+BC showing the largest increase.Meanwhile,the nitrogen recovery rate significantly increased by 27.4%,55.3%,83.1%,and 72.0%under BF,CF+BC,OF+BC,and OF+BF,respectively,compared with that under CF.Therefore,the application of biochar or biochar-based fertilizer in combination with organic fertilizer substitution can promote the simultaneous improvement of soil quality and rice grain yields,which is beneficial to the sustainable utilization of paddy fields in the middle and lower reaches of the Yangtze River in China.关键词
有机替代/生物炭/土壤质量/水稻产量/氮素回收率Key words
organic fertilizer substitution/biochar/soil quality/rice yield/nitrogen recovery rate分类
农业科技引用本文复制引用
卢恒,刘祥,刘晓慧,王珊珊,任可,谷春洋,王智,孙瑞波,李硕..有机替代下配施生物炭促进土壤质量提升和水稻养分利用[J].中国生态农业学报（中英文）,2026,34(5):925-935,11.基金项目
国家重点研发计划项目(2023YFD1902300)资助 This study was supported by the National Key Research&Development Program of China(2023YFD1902300). （2023YFD1902300）
