作物研究2026，Vol.40Issue(2)：130-140,11.
氮肥运筹对水稻镉和矿质养分含量与转运的影响
Effects of Nitrogen Fertilizer Management on Cadmium and Mineral Nutrient Contents and Translocation in Rice
摘要
Abstract
To investigate the effects of nitrogen fertilizer management on the accumulation and translocation of cadmium(Cd)and mineral nutrients in rice,and to provide a theoretical basis for safe production in Cd-contaminated paddy fields,a pot experiment was conducted using two early season rice varieties,Taiyou 398 and Xiangzaoxian No.32,at the Rice Research Institute of Hunan Agricultural University from April to July 2021.A no nitrogen treatment was used as the control(CK),and four nitrogen application ratios(basal:tillering:panicle:grain fertilizer)were set as follows:5∶5∶0∶0(T1),4∶4∶2∶0(T2),6∶0∶2∶2(T3),and 3∶2∶2∶3(T4).The Cd and mineral nutrient contents in different rice organs were compared among treatments.The results showed that nitrogen application promoted the formation of iron plaque on the root surface and Cd adsorption,while inhibiting Cd translocation from roots to aboveground parts.The Fe content in the root iron plaque was positively correlated with root Cd content,but negatively correlated with stem Cd content.The brown rice Cd content of Taiyou 398 followed the order:CK>T3>T2>T1>T4,whereas that of Xiangzaoxian No.32 followed:T1>T2>CK>T3>T4.Notably,T4 achieved the lowest brown rice Cd content in both varieties.In addition,although T1 significantly reduced the Cu,Mn,and Zn contents in brown rice of Taiyou 398(by 31.63%,31.47%,and 24.72%,respectively,compared with CK),it markedly increased the brown rice Cd content of Xiangzaoxian No.32(increased by 38.6%compared to CK),indicating a variety dependent difference.Taken together,the T4 treatment exhibited the best performance in consistently reducing brown rice Cd content without adversely affecting mineral nutrient levels,and can therefore be recommended as a nitrogen management strategy for safe rice production in Cd contaminated paddy fields.关键词
水稻/施肥/氮/镉/矿质元素/根表铁膜Key words
rice/fertilization/nitrogen/cadmium/mineral elements/iron plaque on root surface分类
农业科技引用本文复制引用
陈澎,白宇龙,张玉盛,敖和军..氮肥运筹对水稻镉和矿质养分含量与转运的影响[J].作物研究,2026,40(2):130-140,11.基金项目
国家自然科学基金面上项目(32172107) （32172107）
国家水稻产业技术体系栽培与土肥岗位专家项目(CARS-01). （CARS-01）
