湖南农业科学Issue(5)：27-32,6.DOI:10.16498/j.cnki.hnnykx.2025.005.006
硅肥耦合水分管理对土壤As形态及水稻As累积的影响
Effects of Silicon Application Combined with Water Management on Arsenic Forms in Soil and Arsenic Accumulation in Rice
摘要
Abstract
Pot experiments were conducted with different water management practices combined with silicon application to investigate the effects of water management combined with silicon application on arsenic(As)accumulation in rice and the bioavailability of As in paddy soil.The results showed that the As content in brown rice under alternating drying and wetting(IF)and alternating drying and wetting combined with silicon application(IF+Si)decreased by 54.6%(P<0.05)and 54.5%(P<0.05),respectively,compared with conventional water management(CK)and conventional water management combined with silicon application(CK+Si).Compared with CK,IF increased the content of available silicon and reduced the content of available As in soil.The silicon application increased the pH and available silicon content but decreased the content of available As in soil.Compared with CK,IF reduced the content of exchangeable As(Exc-As),carbonate-bound As(Carb-As),and iron-manganese oxide-bound As(Fe-MnOx-As)in soil.Under the same water management,the content of Exc-As and Carb-As decreased after silicon application.The As content in rice stems and leaves and the content of weak acid extractable As(Acid-As)and Carb-As in soil directly affected the As uptake by brown rice.Soil pH and Exc-As content directly affected the absorption of As by rice roots.Alternating drying and wetting combined with silicon application can effectively reduce the uptake of As by brown rice in production.关键词
水稻/砷污染/硅/水分管理/生物有效性Key words
rice/arsenic contamination/silicon/water management/bioavailability分类
农业科技引用本文复制引用
黄洁,纪雄辉,谢运河,官迪,陈山,吴家梅..硅肥耦合水分管理对土壤As形态及水稻As累积的影响[J].湖南农业科学,2025,(5):27-32,6.基金项目
国家重点研发计划项目(2022YFD1700105) （2022YFD1700105）
