植物营养与肥料学报2025，Vol.31Issue(10)：1901-1914,14.DOI:10.11674/zwyf.2025028
小麦籽粒锌强化和土壤有效锌含量对锌肥响应的区域差异
Regional differences in responses of wheat grain Zn bio-fortification and soil Zn availability to Zn fertilization
摘要
Abstract
[Objectives]Znic(Zn)biofortification in wheat grain varies remarkably with regions and sites.We studied the reasons and the suitable Zn fertilizer application rates suitable for the main wheat production regions in China.[Methods]This study was conducted in Yongshou of Shaanxi,Baixiang of Hebei,Zitong of Sichuan,and Shucheng of Anhui across two cropping seasons of 2022-2023 and 2023-2024.ZnSO4·H2O was applied into soil as basal fertilizer at Zn rates of 0,6.8,13.6,20.4,and 27.2 kg/hm2.Wheat yield,biomass,yield components,Zn concentration in various plant parts were analyzed,and topsoil samples were simultaneously collected to determine soil available Zn contents.[Results]Zn application did not lead to significant differences in grain yield,biomass,and yield components,but significantly enhanced Zn concentration in various parts of wheat.Every 1.0 kg/hm2 of Zn input could lead to an average increase of 0.28,0.15,0.75,and 1.54 mg/kg in grain Zn in Shaanxi,Hebei,Sichuan,and Anhui,respectively.At Zn application rate of 10.5 and 0.0 kg/hm2,the grain biofortified target of 40.0 mg/kg and the highest of 46.6 and 75.5 mg/kg were achieved respectively in Sichuan and Anhui,but in Shaanxi and Hebei,the grain Zn concentration only reached 31.4 and 36.5 mg/kg even at the highest Zn application rate.Every 1.0 kg/hm2 of Zn input could lead to an average increase of 0.14,0.12,0.17,and 0.50 mg/kg in wheat flour Zn in Shaanxi,Hebei,Sichuan,and Anhui respectively.The Zn concentration in flour reached 15 mg/kg in each region in the cropping season of 2023-2024.Shoot Zn use efficiency was higher in Sichuan and Anhui,with an average of 0.87%and 1.31%,which was higher than that of Shaanxi and Hebei,where the values were correspondingly 0.25%and 0.16%.Translocation of Zn from shoot to grain was significantly decreased,and that to straw was increased with Zn application,while the distribution ratio of absorbed Zn between flour and bran in grain was not changed.Concentration of available Zn in soil was significantly increased with Zn application,with the increase in the second year being higher than that in the first year,and the highest increase was found in Anhui,followed by Sichuan and Hebei,with the lowest in Shaanxi.The average increase was 0.28,0.16,0.16,and 0.14 mg/kg for each 1.0 kg/hm2 of Zn input at the four sites,respectively.[Conclusions]After continuous Zn application,available soil Zn concentration was effectively enhanced in all regions.Wheat Zn biofortification differences were mainly determined by soil pH and available Zn contents in different regions.Sichuan and Anhui could achieve the grain Zn biofortification target of 40.0 mg/kg,while Shaanxi and Hebei could not,with average grain Zn concentrations reaching 46.6,75.5,31.4 and 36.5 mg/kg respectively,over two years.Meanwhile,flour Zn concentration in all four regions could achieve the biofortification target of 15.0 mg/kg after continuous Zn application.Overall,to achieve wheat Zn biofortification targets,the minimum Zn application rate of 10.0 kg/hm2 is recommended in calcareous soils with available soil Zn lower than 0.5 mg/kg,while the Zn application rate could be less than 6.0 kg/hm2 in acid soils with available soil Zn close to 1.0 mg/kg.关键词
小麦/锌含量/锌肥/土壤施锌/有效锌/施锌量Key words
wheat/Zn concentration/Zn fertilizer/soil Zn application/soil available Zn/Zn application rate引用本文复制引用
李文虎,杨珺,李小涵,刘金山,王朝辉,刘保华,礼海风,杜宇鹏,李宇珂,佘文婷,李艳霏,宋文斌,张丰,黄翠..小麦籽粒锌强化和土壤有效锌含量对锌肥响应的区域差异[J].植物营养与肥料学报,2025,31(10):1901-1914,14.基金项目
国家现代农业产业技术体系建设专项(CARS-3). （CARS-3）
