中国农业科学2025，Vol.58Issue(15)：3036-3050,15.DOI:10.3864/j.issn.0578-1752.2025.15.008
我国不同麦区土施硒肥的小麦富硒效应
Effect of Applying Selenium Fertilizer to Soil on Selenium Enrichment of Winter Wheat in the Different Wheat-Producing Areas of China
摘要
Abstract
[Objective]Based on varying climate,soil,tillage,and field management conditions in different wheat-producing regions of China,this study aimed to investigate the impacts of soil-applied selenium(Se)fertilizer on Se enrichment in wheat and the available Se content in soil.Furthermore,the regional factors contributing to differences in the enhancement of Se content in wheat grain across these diverse areas were analyzed.These findings would provide a foundation for the efficient utilization of Se fertilizer and the scientific advancement of biofortified Se in wheat grain.[Method]The experiment was conducted from 2022 to 2024 in four representative wheat-producing regions of China,including Yongshou County of Shaanxi Province,Baixiang County of Hebei Province,Zitong County of Sichuan Province,and Shucheng County of Anhui Province.Five different levels of selenite fertilizer were applied:0(Se0),100(Se100),200(Se200),300(Se300),and 400(Se400)g·hm-2.At the flowering and maturity stages of wheat,wheat plant and soil samples in each plot were collected.The wheat biomass,grain yield,Se content of different wheat organs,Se uptake and soil available Se content in different wheat-producing regions were determined and analyzed.[Result]Soil-applied Se fertilizer had no significant effect on wheat yield and aboveground biomass.Selenium content and accumulation in wheat organs were significantly increased with the increase of Se application rate.There was a linear positive correlation between Se content and Se application rate,and the selenium enrichment effect was in the order of Baixiang of Hebei Province>Yongshou of Shaanxi Province>Shucheng of Anhui Province>Zitong of Sichuan Province,and the Se content of grain was increased by 1.03,0.57,0.35,and 0.33 μg·kg-1,respectively with each application of 1 g·hm-2 selenium.Under the same Se application level,TFspike/stem and leaf value at flowering stage was higher than TFstem and leaf/root value,and TFgrain/stem and leaf value at maturity stage was increased with the increase of Se application rate,indicating that selenite was not easily transferred from root to stem and leaf,but easily transferred from stem and leaf to ear.The soil available Se content was significantly increased with the increase of Se application rate and the increasing effect was in the order of Yongshou of Shaanxi Province>Baixiang of Hebei Province>Shucheng of Anhui Province>Zitong of Sichuan Province,and the soil available Se content at the four sites was increased by 1.141,0.077,0.008,and 0.008 μg·kg-1,respectively with a rate of 1 g·hm-2 selenium application.The Se fertilizer application rate to meet the enrichment of grain selenium(150 μg·kg-1)in Yongshou of Shaanxi Province,Baixiang of Hebei Province,Zitong of Sichuan Province and Shucheng of Anhui Province were 232,0,376,and 354 g·hm-2,respectively.[Conclusion]In the wheat fields with low soil Se content,the application of Se fertilizer could lead to the production of Se-enriched wheat grain and an increase in the soil Se content in various wheat-producing regions of China.However,in alkaline soils,the enrichment of Se in wheat grain was more effective and the enhancement of soil available Se content was greater.The input rate of Se fertilizer for selenium enrichment requirement of wheat(>150 μg·kg-1)was lower in the alkaline soil than that in the acid soils.关键词
小麦主产区/硒肥/籽粒硒含量/土壤硒含量/硒强化指数Key words
main wheat-producing area/Se fertilization/grain Se content/soil Se content/Se biofortification引用本文复制引用
礼海风,李文虎,李宇珂,王朝辉,刘金山..我国不同麦区土施硒肥的小麦富硒效应[J].中国农业科学,2025,58(15):3036-3050,15.基金项目
国家重点研发计划(2021YFD1900700) （2021YFD1900700）
