华中农业大学学报2025，Vol.44Issue(4)：37-46,10.DOI:10.13300/j.cnki.hnlkxb.2025.04.004
硅酸钾改性生物炭对土壤铝硅形态和小麦生长发育及产量的影响
Effects of potassium silicate-modified biochar on speciation of aluminum and silicon in soil,growth and yield of wheat
摘要
Abstract
Acidic soil was used to study the effects of potassium silicate-modified biochar on the spe-ciation of aluminum(Al)in soil and the growth of crops.7 treatments including CK(no biochar),0.5％raw biochar(0.5％unmodified biochar,0.5％CBC),1％raw biochar(1％CBC),2％raw biochar(2％CBC),0.5％potassium silicate-modified biochar(0.5％S-CBC),1％potassium silicate modified biochar(1％S-CBC),and 2％potassium silicate modified biochar(2％S-CBC)were set up for pot experiments to plant wheat and measure soil properties,with 4 replicates per treatment.The results showed that the ef-fect of S-CBC on promoting the growth of wheat was higher than that of raw biochar.The root vitality of wheat seedlings treated with 0.5％S-CBC significantly increased by 103.0％.The single-spike weight of wheat treated with 0.5％S-CBC significantly increased by 8.61％compared to that with 2％CBC.S-CBC treatment significantly reduced the content of aluminum in wheat plants and increased the absorption of sili-con by roots of wheat.The addition of biochar significantly decreased the content of exchangeable acids in soil.0.5％S-CBC treatment decreased the content of exchangeable acid by 29.17％and promoted the con-version of active aluminum to inactive state compared to 2％CBC treatment,indicating that the effect of S-CBC is significantly stronger than that of CBC.Biochar increased exchangeable base cations in soil,and 0.5％S-CBC treatment increased exchangeable K+by 87.96％compared to 2％CBC treatment.Biochar in-creased microbial activity in soil and changed the composition of bacterial community,with soil pH and ex-changeable Al3+(Ex-Al3+)identified as key factors affecting the richness of microbial community.Overall,the addition of S-CBC improved soil fertility,alleviated soil acidity,increased microbial activity in soil,and thus promoted the growth of wheat.The best effect was achieved with the addition of 0.5％S-CBC to the soil tested.关键词
硅酸钾改性生物炭/酸性土壤/铝形态/微生物群落/小麦/根系/生长Key words
potassium silicate-modified biochar/acidic soil/aluminum speciation/microbial commu-nity/wheat/root/growth分类
农业科技引用本文复制引用
龙巧玲,朱俊,谭文峰,林杉,付庆灵,胡红青..硅酸钾改性生物炭对土壤铝硅形态和小麦生长发育及产量的影响[J].华中农业大学学报,2025,44(4):37-46,10.基金项目
国家重点研发计划项目(2021YFD1901202) （2021YFD1901202）
