硅肥耦合水分管理對(duì)土壤As形態(tài)及水稻As累積的影響

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中圖分類(lèi)號(hào)：S156 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1006-060X（2025）05-0027-06

引用格式：，等.硅肥耦合水分管理對(duì)土壤As形態(tài)及水稻As累積的影響[J.湖南農(nóng)業(yè)科學(xué)，2025（5）：27-32

DOI：10.16498/j.cnki.hnnykx.2025.005.006

Abstract：Pot experiments were conducted with diferent water management practices combined with silicon application to investigate theeffects of water managementcombined with siliconapplicationonarsenic （As）accumulation inriceand the bioavailabilityofAsinpaddysoil.TheresultsshowedthattheAscontentinbrownriceunderalternatingdryingandwettig（IF） and alternating drying and weting combined with silicon application （IF+Si） ）decreased by 54.6% （P<0.05） ）and 54.5% （P<0.05） ， respectively，compared withconventional water management （CK）andconventional watermanagementcombined with silicon application （ CK+Si） . Compared with CK，IF increased the content of available silicon and reduced the content of available As in soil. ThesilicoaplcationincreasedthepHandavailablesiliconcontentbutdecreasedthecontentofavailableAs insoil.Comparedwith CK，IFreducedthecontentofexchangeableAs （Exc-As），carbonate-boundAs （Carb-As），andiro-manganeseoxide-boundAs FeMnOx-As）insoil.Under thesame water management，thecontentofExc-As and Carb-Asdecreased aftersiliconaplication.The As contentinricestemsandleavesandthecontentofweakacidextractableAs （Acid-As）andCarb-Asinsoildirectlyafectedthe As uptake bybrowice.Soil pHandExc-AscontentdiretlyafectedtheabsoptionofAsbyricerots.Alteatingdryingandweting combined with silicon application can effectively reduce the uptake ofAs by brown rice in production.

Keywords：rice;arsenic contamination; silicon;water management; bioavailability

砷（As）作為強(qiáng)毒性類(lèi)金屬元素，在水稻中有較強(qiáng)的富集能力[。（剩余11571字）